How to connect 2 amplifiers to a radio with 2 rca: 1, in a car, diagram of connecting two to one linear output in a car, subwoofer, two subwoofers

Over time, those who like to listen to music in a car experience a lack of power and quality, so they are constantly developing their audio system. The process of creating the perfect audio system is constantly evolving, so hobbyists resort to clever tricks to achieve their goals. One of these techniques is based on simultaneously connecting two amplifiers in a car. Special circuits have been developed for this, because in order to correctly perform this procedure, it is necessary not only to connect the output of a sound source, for example a radio, with the inputs of two amplifiers, but also to properly organize the power supply system. Connection diagrams for two amplifiers in a car are performed in several variants; let’s look at each of them in more detail.

List of required components

To begin with, let’s decide on a general list of parts, namely their name and function, and then give a recommendation for selection.

Power wire. Supplies power from the battery to the amplifier. For a medium-sized sedan you will need 5 m of “plus” and 1 m of “minus”. You can get more accurate dimensions by measuring your car yourself.
Bulb with fuse. An important component. Serves as protection in the event of a short circuit in the power cable.
Terminals. Allows you to simplify the connection of power wires to the battery and car body. You will need 2 pcs. ring type. If the connection to the amplifier is on the blades, you will need 2 more pieces. fork type.
Tulips and control wire. Transmits an audio signal from the radio to the amplifier. Can come complete with interconnect cables or be purchased separately.
Speaker wire. Transfers an improved signal from the amplifier to the subwoofer. You will need 1-2 m. If you have an active subwoofer, this wire will not be needed.
Additionally, a distributor may be needed if two amplifiers are installed.

Adviсe

Let's give some advice.

In addition to calculating the load on the equipment in a specific connection, it is important to correctly select the wires that match the resistance in the circuit. Preference can be given to acoustic wires, which give the purest sound at the output, or to ordinary wires with R not lower than 4 ohms. To avoid damage and short circuit, the polarity of the contacts + to - should be strictly observed. When you turn on the radio for the first time to check, the volume should be minimal

If the sound is distorted, the equipment should be turned off immediately. This effect occurs when the polarity of the connections is not observed, which will have to be corrected.

Two subwoofer solutions

Here are three ways to add two subwoofers to your home theater system:

If your home theater receiver only has one subwoofer preamp output (sometimes labeled Pre-Out, Sub Out, LFE, or Subwoofer Out), simply use an RCA Y-Adapter and use it to send two parallel low-frequency audio signals to two separate subwoofers.
If your home theater receiver has two subwoofer outputs, connect one output to one subwoofer and the other to the other subwoofer.
If one of your subwoofers has an RCA Line-in and Line out option, you can choose to connect your subwoofer to your subwoofer, and then connect the subwoofer's line-in to the line-in input of the second subwoofer.

Connecting an active subwoofer

As we have already said, an active sub combines an amplifier and a passive sub. Connecting such a system is even easier. This is explained by the fact that the amplifier is already connected to a speaker inside the active subwoofer housing. Otherwise, the connection process is no different from the “amplifier - passive subwoofer” system.

When purchasing an active sub, check the standard wires that are included in the kit. They may not meet the requirements for cross-section and material from which they are made. In this case, by replacing them in accordance with the recommendations outlined above, you can significantly improve the quality and volume of playback.

Required tools and materials

Before connecting two amplifiers to the radio, you will need to prepare:

speaker cables of the required length;
copper cords for connecting to the car's bot network;
special connectors for signal separation (Y-shaped);
insulation removal tool;
set of screwdrivers and wrenches;
brackets for mounting amplification units in the cabin;
additional mounting accessories (depending on the vehicle design).

Classification of subwoofers and methods of installing them in a car

Connecting an active subwoofer One of the common ways to connect an active subwoofer is the following sequence of actions: Power and signal wires are used to install the subwoofer. At the end of this article you will find a diagram for connecting the subwoofer to the standard radio and amplifier, as well as video instructions on how to properly install and connect the subwoofer in the car yourself.

However, such devices are not very powerful. Connection diagram for a passive subwoofer in a car Connecting a passive subwoofer in a car is somewhat more complicated, since it needs to be connected not directly to the radio, but through an amplifier, see the connection diagram above. We lay the wiring in the engine compartment in the standard wiring harness and bring it out into the cabin. The amplifier is used to increase the volume headroom, reduce distortion and improve the sound quality of music. As a result, such a good quality kit turns out to be more expensive than a ready-made active sub. To prevent the cable from fraying, it is better to insert a rubber bushing, for example, a piece of hose. Only high-quality wires are used for installation. Since the wires will have to be pulled through the interior, in order to avoid chafing of the cable, it is better to use corrugated sleeves, which must be securely fastened to the cable connection points. To connect a passive crossover, it is placed directly in front of the load, i.e. Crossovers are of active and passive types, as well as one- and two-way.

Classification of subwoofers and methods of installing them in a car

Using a converter involves connecting the main speakers through an amplifier.
Let us also add that any work on connecting electrical equipment in a car must be carried out by removing the terminals from the battery. To which the seller offered me a more budget-friendly option. However, it also happens that an amplifier or active subwoofer does not have such an input.

The wires should not be thin. The subwoofer's subwoofer bass and front bass are enhanced or sounded quieter by different sized speakers. Subwoofer lighting It is better to do the lighting for the subwoofer speaker at the stage of manufacturing the box. How to connect a subwoofer and amplifier. Fast and clear.

Where does antifreeze leak from and how to find the leak

Leaks in the radiator, pipes or other components can often be noticed by wet spots, accumulated drops of coolant, etc. If a visual inspection does not allow you to accurately detect the location of the leak, then during the search you should check all the components of the cooling system one by one.

First of all, the expansion tank may be the culprit. It is also possible that antifreeze is leaking from under the cap. In this case, the coolant will evaporate through the cracks and cracks that appear on the tank body or lid. It can be difficult to visually identify such a malfunction, since leaks through microcracks are almost invisible. To eliminate the malfunction, it is better to change the tank and/or cap.

Attention! Before starting work related to the cooling system and checking it, the engine must be allowed to cool down. Failure to follow this rule may result in serious burns and injury.

Another reason for increased antifreeze consumption may be pipes and connections. In this case, it is easier to detect the leak. Many car enthusiasts use a simple method, which is to place a sheet of paper under the car. If the car has engine protection, then the sheet is placed on the protection. Then the car is parked. The appearance of coolant stains is a reason to inspect the pipes, hoses, as well as their connections to the radiator of the cooling system. The thermostat gasket also deserves special attention, since antifreeze leaks from under the thermostat are quite common. The thermostat housing may also be faulty. In such a situation, the device is changed.

Rubber pipes should be inspected first, as access to them is often easy. Also, if a problem is detected with the pipe, this element can be replaced without much difficulty. The main problem with pipes is their cracking, since the rubber product is exposed to high temperatures and also operates under conditions of constant heating and cooling. Cracks in rubber pipes usually do not cause severe leaks; antifreeze seeps through the defects slowly. During the inspection, you need to take into account that a crack may appear on different sides of the pipe. For this reason, the pipes should be carefully felt, and a mirror can be used to inspect hard-to-reach areas.

It should also be added that the problem may not be in the rubber pipes themselves, but in their connection points. In other words, you should check the tightness of the clamps at the junction of the pipe with the fittings. Tightening them tighter often helps.

By the way, many car enthusiasts are interested in how to fix antifreeze leaks from the radiator or pipes, how to fix leaks at the junction of the pipe and the fitting. In the case of a cooling radiator or heater core, the element must be replaced or repaired. Repairing a radiator involves soldering it. As a last resort, you can use sealant for the cooling system. As for how to eliminate antifreeze leaks from the pipes, the element needs to be replaced. Note that it is also possible to use a special sealant, but this is only a temporary measure. After applying sealant at the joints, taking into account temperature changes (expansion when heating and contraction when cooling), this method is also not reliable. It turns out that the sealant is suitable for the radiator, but not for the pipes.

If everything is fine with the pipes and tank, then the next step is to check the pump (water pump of the cooling system). In practice, cases when antifreeze leaks from the pump occur quite often. Coolant leakage occurs due to the fact that the coolant pump seal loses its properties. Antifreeze flows down the pump rod, after which it splashes. Upon visual inspection, this is clearly visible, since nearby parts will have traces of coolant on the surface. In a situation where antifreeze is leaking from under the pump, it is better to immediately diagnose and replace the water pump. The fact is that on many cars the pump is driven by a timing belt. Jamming of the pump can lead to a broken belt, resulting in a high probability of bent valves.
The hidden cause of a leak of antifreeze or antifreeze can also be the heater radiator. The specified radiator may not leak much, as a result of which the coolant begins to evaporate from the system. Obvious signs include severe fogging of the windshield, as well as a sweetish smell of antifreeze in the cabin. More serious leaks appear in the form of coolant appearing under your feet (often under the front passenger seat).
Also in the list of cooling system faults, it is necessary to highlight an antifreeze leak from under the cylinder head. Such leaks may be a sign of cracks in the cylinder head, and also indicate a blown head gasket.

More often, a problem with the gasket occurs; burnout or breakdown occurs on cars whose mileage often exceeds about 100 thousand kilometers traveled. The fact is that the gasket is under serious stress. The service life of the element is also affected by the material of manufacture (paronite or metal product).

A more serious problem is cracks in the block or cylinder head. It should be noted that antifreeze leakage due to cracks or problems with the gasket does not always mean that coolant is coming out. If the defect affects the channels of the lubrication and cooling system, then coolant may enter the internal combustion engine cylinders and the coolant will mix with the engine oil. As a result, not only does the antifreeze level drop, but the lubricant also loses its properties. This can have serious consequences for the engine; the power unit wears out greatly, jams and fails.

To exclude or confirm the diagnosis, it is enough to check the oil level, as well as conduct an inspection for emulsion. If the level has increased and characteristic brownish-white foam is visible on the dipstick, this will indicate that coolant has entered the lubrication system of the internal combustion engine. While still checking, you can unscrew the spark plugs and inspect them. If white spots are noticed, then this is also a sign of antifreeze in the oil. Another sign is white exhaust, which indicates that liquid from the cooling system has entered the cylinders.

How to determine plus and minus on a speaker

In heavily worn, dubious speakers and loudspeakers, polarity information may be missing. In this case, the polarity of the speakers is determined using simple experiments.

Multimeter

The speaker impedance is low (from 2 to 4 ohms). It can be checked with a multimeter, but it rings equally in both directions. However, when connecting the red (positive) probe to the “+” speaker, the negative (black) probe to the “minus” speaker, the diffuser will move slightly forward (towards the listener). This movement is best determined by touch with your finger rather than visually.

Using a battery

When connecting the plus of the battery to the + of the speaker, the minus of the battery to the minus contact of the speaker, the cone will also move frontally, along which the speakers can be phased. Even if you phase all the speakers in reverse polarity, the sound quality will be the same as in direct polarity. The main thing is that all speakers work in the same phase. The battery should be connected for a short time (one or two seconds), otherwise you can “burn” the speaker.

Video - how to find out the polarity of the speaker:

Under no circumstances should you check the polarity of speakers and speakers using a car battery or charger. Even a short-term connection of the speaker to the battery can damage it.

Using a battery and a sheet of paper

Sometimes (for example, in a speaker) the speaker cone is covered with mesh or fabric. In this case, you can put a light sheet of paper on its surface. When voltage is applied, the sheet of paper will move forward or backward due to the sound pressure of the air. By the direction of movement one can judge the polarity.

Important points

In the end, we summarize all the main aspects that need to be observed in order to connect the amplifier correctly and safely:

Select a power cable of sufficient cross-section, preferably with a margin.
Select the correct fuse.
All contacts must be stripped and tightly tightened or crimped (the larger the contact area, the better).
Knock out quality copper wiring.
Protect cables from damage with additional insulation.
Lay acoustic and signal wiring as far as possible from the power supply.
If you have several amplifiers and the minus is taken from the body, then make contact for all at one point.
Make all connections on a de-energized system (positive terminal with battery removed).

Appetite comes with eating. It’s the same with speaker systems: the process of creating an ideal car speaker system is addictive, once you touch the world of good car sound. Sooner or later, the owner of car speakers comes up with the idea that it would be nice to connect two amplifiers to one radio. When first a thought appears, and then a second amplifier, then this is all right. But the trouble is that usually thought slows down, and the amplifier (given as a gift, got it for the occasion, changed) - here it is, already there. The one you got - after all, you don’t look a gift (found) horse in the mouth.

What's the pinout?

The pinout is presented in the form of a schematic drawing or, if possible, a color table. In which are given:

information about the contact number,
its short name,
the color of the cable sheath is indicated,
its functional purpose,
electrical characteristics.

In the drawing version, the connection side. That is, the view of the connector from the side of the connecting cable or from the side of the device connected to it.

The world's major manufacturers of automotive electronics and related equipment, in order to ensure user convenience, try to adhere to a single standard for all devices and connectors, developed by the International Organization for Standardization (ISO)

With minor technical and color deviations that do not play a particularly important or noticeable role during installation work on pinouting wires for the Pioneer radio

How to connect a subwoofer to an amplifier

First of all, it is worth remembering that the power of the subwoofer and amplifier must match. If in doubt, consult your retailer when purchasing both devices. Otherwise, the sound will not be of sufficient quality, and voltage surges can completely damage the system.

When connecting the subwoofer to the amplifier, do not forget about the positive and negative terminals, as well as the standard fuses on the wires. If these are not included initially, be sure to purchase them separately. They will protect the system from energy surges and save energy consumption.

The ground wire is attached to an unpainted metal surface. Here everything depends on convenience and its length. It is often attached to the screw from the seat. Make sure to clean the end of the wire well so that nothing interferes with the process.

When connecting wires directly from the radio, do not forget about the power cord. If you lose sight of it, the system simply will not work. Usually this is a thin blue wire going to the central entrance.

Types of electric windows

There are three types of electric windows:

Cable ones are the cheapest, but they cope with their main task. True, the speed of lowering and raising the windows is very small. If the glass freezes, the cable breaks. The entire drive fails and the glass falls inside the door.
Rack and pinion windows very often break when the glass freezes. It is imperative to lubricate the mechanisms, otherwise they will jam.
Articulated-lever, the most expensive, but also the most reliable. The glass moves quickly enough, they make virtually no noise, and do not break if the glass freezes.

Since you can connect the power windows correctly only if you have all the necessary elements, you need to make sure that the device is complete. The box with window regulators should contain wires, plugs, fasteners, buttons, and cuffs. The presence of all these components will facilitate installation of the device.

Connecting two car amplifiers

Well, let's all go in order: 1 What is a 2-channel amplifier. Ready-made sets of interconnect wires always include a control cable. A fuse is installed along the power circuit to protect against short circuits and possible overloads. Some people connect subs to class D amplifiers in series. Let's move on to the next point directly to the connection diagrams. Now we have come to the final stage, after connecting, we need to configure the 2-channel amplifier with the adjustment controls.

Well, let's all go in order: 1 What is a 2-channel amplifier. Do not forget to check at what resistance the amplifier provides such power. His role is as follows. One of the advantages of an active filter is the ability to fine-tune frequency cuts.

A two-coil subwoofer, as well as two, three or more subwoofers, can be connected in four ways: each coil separately, parallel connection of coils, serial and combined. An option would be a high-level adapter, which is a signal level converter. connecting an amplifier to a subwoofer

Cost of services

Installation and connection

— monoblock 1-2 hours 3000–4000 rub. — 1-channel 1-2 hours 3500–4500 rub. — 2-channel 2-3 hours 3500–8000 rub. — 3-channel 2–4 hours 3500–8000 rub. — 4-channel 2–4 hours 3500–8000 rub. — 5-channel 2–4 h 4000–10000 rub. — 6-channel 2–4 hours 4000–10000 rub. — 8-channel 2–4 h 4000–10000 rub. Amplifier replacement (with tuning) 1 hour 1000–2000 rub. Installation (mounting) of an amplifier without switching 1-2 hours 1500–3000 rub. Connecting the amplifier to the main unit 2 hours 3000–4500 rub. Bypass of a standard amplifier 2 hours 2500–4000 rub. Starting a standard amplifier 1–3 hours 1500–4000 rub. Laying a signal cable 1 hour 1500–2000 rub. Laying a power cable from the battery 1 hour 1000–2500 rub. Amplifier adjustment output 30 minutes 500–1500 rub.

Audio preparation (cables and their installation) is included in the installation price.

Fault diagnostics 0 / 500–1500 rub. Selection of audio system components 5 min – 1 hour free Adjustment of acoustics (during installation) free

Related car audio services

Installation (installation) of coaxial acoustics 2–4 hours from 1400 rub. Installation (installation) of broadband acoustics 2–4 hours from 1600 rub. Installation (installation) of two-component acoustics 2–5 hours from RUB 3,500. Installation (installation) of three-component acoustics 3–6 hours from 4500 rub. Installation (installation) of subwoofers 1–4 hours from 500 rub. Manufacturing of subwoofer housing 1–7 days from RUB 3,000. Installation (installation) of radio tape recorders from 15 minutes from 500 rubles. Organization of linear RCA outputs from an hour from 1000 rubles. Installation (installation) of the processor with configuration 4–6 hours 1500–4000 rub. Production of podiums for acoustics from an hour from 1000 rubles. Manufacturing of spacer rings 1–4 hours from 400 rub. False panel for amplifier day 1500–3000 rub. Modification (modernization) of the rear shelf 1–4 h 1000–2500 rub. Disassembly and assembly of interior elements from 30 minutes from 300 rubles. Installation of a capacitor (storage) 1 hour 600–1500 rub. Crossover installation 1 hour 800–1200 rub.

The essence

No matter which option you decide to take advantage of to get the best bass coverage for your room, regardless of the brand, model, size, and connection option of your subwoofers, you still need to find the best place in your room for each, providing the best performance from everyone subwoofer, and all together - be prepared to listen and move a lot, and tweak settings to get the best result for your room and listening preference.

The considerations and options above are for use with standard subwoofers, if you are using passive subwoofers, in addition to the subwoofers you will need an additional separate external amplifier to power each passive subwoofer.

Buying multiple subscribers and configuring them for the best results can be an expensive and time-consuming project. If you don't think you're up to the task of doing it yourself, have a home theater dealer/installer evaluate your room and current setup to see if you really need multiple pads to get the best bass performance.

How to install

After the amplifier has been purchased, you need to choose a place for its installation and perform the correct installation, taking into account possible nuances. You should not install the device in the first place you like: most likely this will not be the best option.

Choosing the right place

Depending on the location of the amplifier, the length of the connecting wires will depend. Please note that when installing in the luggage compartment, you will need wires to connect the radio to the amplifier and subwoofer. On average, you will need about 5 m of wire for the multimedia system and 3 m for each speaker, which depends on the specific machine. Calculations are made in advance, since the wires will be laid under the casing.

When choosing a location, it is important to consider that the amplifier generates a lot of heat, so normal air circulation is welcome. Avoid installing the device in a side position or upside down; it is also necessary to avoid air obstruction, which is possible when covering it with a rug or things. One of the options for installation space could be the space under the driver's seat. In this case, it will be possible not only to save on the length of the wires, but also to improve the sound quality, since with a longer length part of the signal is lost.

In fact, there are many options for mounting an amplifier, so it’s worth dwelling on each of them, at least briefly:

The front of the cabin or the center. This option is optimal (depending on the vehicle) because it can achieve good coupling to the load, which will provide an extended level of transient frequency.
In the trunk. If it is planned to install two amplifiers, then one is installed in the front, the second in the luggage compartment. The connection will require longer wires, but the location of the device will not take up free space.
Installation on the rear shelf. This option is relevant for a car in a sedan or coupe, and the shelf must be durable.
Under the passenger or driver seat. There will always be free access to the device, which will ensure quick dismantling if necessary.

How to connect a two-coil sub to an amplifier

In electrodynamic heads that are used in subwoofers, there are models equipped with two voice coils. Such speakers are no different in appearance from ordinary speakers, and their only difference is the additional terminals for connecting the second winding. The material, number of turns and electrical parameters of the sound windings are the same. Usually subwoofers have a winding resistance of 4 or 2 ohms, but there are heads with other coils.

It happens that one subwoofer model is offered in two versions: with one sound winding or with two.

Connecting interconnect wires and control (REM)

To lay the cable, you need to find the linear output on the radio. The linear output can be recognized by the characteristic “bells” that are located on the rear panel of the radio. The number of linear outputs differs in different radio models. Usually there are from one to three pairs. Basically they are distributed as follows: 1 pair - you can connect a subwoofer or 2 speakers (labeled as SWF) If there are 2 pairs of them, you can connect 4 speakers or a subwoofer and 2 speakers (outputs are labeled F and SW), and when there are 3 pairs of linear wires on the radio, you can connect 4 speakers and a subwoofer (F, R, SW) F This is Front i.e. front speakers, R Read rear speakers, and SW Sabwoorer I think it’s clear to everyone what that is.

Comparative Features

That is, an active subwoofer is a passive subwoofer with a power amplifier, which is located inside or outside the housing. And if in the case of an active subwoofer the developer has already taken care of us, then for a passive subwoofer we will have to buy an amplifier separately. At the same time, sometimes there are kits on sale that consist of a passive subwoofer, a separate power amplifier selected by the manufacturer, as well as a set of wires for connection.

For both active and passive subwoofers (a separate subwoofer speaker can also be called a passive subwoofer, except that it comes without a housing), cabinet designs are used - a closed box (a completely sealed volume for the speaker) and a bass reflex box (the box has an outlet port or slot). Also, passive subwoofers often use a Bandpass box design (the box is divided into two volumes and provides a more complex configuration of drop-off ports), which is very rarely used in active subwoofers. At the same time, active subwoofers often have compact designs (the smallest design volume is achieved), which, of course, are not used in passive subwoofers.

Installation of both passive and active subwoofers (not taking into account the compact design) is carried out in the trunk of a car, regardless of the body. Compact active subwoofers are usually installed on the back of the rear seats or under the car seat.

And now about the most important thing - the advantages and disadvantages of active and passive subwoofers. Let's consider three main arguments that are of greater interest to car owners - cost, compactness of installation and possible end result.

Active or passive / Cost comparison of equipment and installation

As a rule, the cost of active subwoofers is slightly higher than passive ones, due to the presence of a built-in power amplifier. But due to the fact that for a passive subwoofer it is necessary to purchase a separate power amplifier and also install it, the cost of equipment and installation of a passive subwoofer is higher than that of an active subwoofer.

Active or passive / Installation compactness comparison

Manufacturers are trying to make the housing for an active subwoofer as compact as possible, even taking into account the space for the amplifier. This is not to mention active subwoofers in a compact design, which do not take up any significant amount of free space at all. That is, passive subwoofers take up more free space (although not always), especially since some space is also required for installing a power amplifier.

Active or passive / Comparison of the final result

For the most part, an active subwoofer is used as an addition to the main sound stage. That is, it introduces some low-frequency component, but there is no noticeable accentuation on it. At the same time, the passive system allows you to achieve the necessary characteristics from the sound of the subwoofer - quality, power, bass depth. And although there are very good active systems, they are all very expensive, which negates the above advantages of such subwoofers.

Evgeny-250 › Blog › Connecting 2 amplifiers

A very good article, a read for anyone who wants to properly connect the speakers in their car! 03/30/05, “Car & Music” Magazine Everyone knows about the advantages of using several amplifiers in a system, but their practical connection has a number of nuances for those who are doing it for the first time. How to organize the supply of power and signal, how to achieve the best quality and reduce interference, how to get the most efficient system without the risk of damaging its components? Let's look at the most important aspects of this topic.

POWER CONNECTION A system with multiple amplifiers will require either several power cables to supply power, or one, but larger cross-section. If the system is not being built from scratch, but is being upgraded by adding an amplifier to an existing one, then the most optimal option may seem to be laying an additional power cable of the required cross-section, since the previous one most likely will not cope with the increased load. In fact, it makes more sense to replace it with a larger gauge cable. The difference in price between power cables of adjacent gauges will be less than the cost of an additional cable of a smaller cross-section, and besides, a thick cable is always better. Moreover, this aspect is always worth keeping in mind when building a system that may require an upgrade in the future, i.e. It is advisable to initially use a cable with the largest possible cross-section as the budget allows, even if at first there is only one amplifier in the system. In addition to the financial side of the issue, it is worth considering that it is easier to lay one thick cable from the battery to the trunk than two thinner ones, especially for cars where the wiring goes through places densely populated with electronics and mechanisms. In addition, with one cable, the connection to the battery is simplified and there is no need for several power circuit fuses on the battery side. In order to supply power through one power cable to several amplifiers, you will need a power distributor, from which short cables of smaller cross-section will supply power directly to individual devices. There are many types of distributors, and, in my opinion, the simplest ones are preferable - without a built-in fuse and any voltage indicators. The only requirement is good terminal design for reliable contact. Simple distributors are more affordable; moreover, if there is a fuse in the amplifier (the vast majority of devices have one) and the main power circuit fuse located next to the battery, additional system protection is not required.

EDITOR'S COMMENT The question of how many fuses are needed in a power circuit causes fierce debate, and this article expresses the American approach, in which it is generally accepted that a battery fuse, if it is built into the amplifier, is a more than sufficient solution. In the European installation school, such measures are considered insufficient, and the use of fuses in the power distributor (or between it and the amplifier) is strongly encouraged. In this case, the number of fuses in the distributor must be equal to the number of its output connectors - for example, a 1x4 distributor requires 4 separate fuses. It is worth considering that for participants in car audio competitions in Europe and Russia, the lack of protection with additional fuses is punishable by penalty points.

GROUNDING There are two approaches to grounding several amplifiers: either do it at one point, or at different points, for each separately. My practical experience shows that the second method is preferable, and its main advantage is better immunity to interference. (This issue has already been addressed in one of the recent publications - see C&M No. 11/2004.) It cannot be said that grounding each amplifier separately can give a 100% guarantee of the absence of interference, but most often it still gives a better chance of coping with this task, in this case, the experimentally found distance between the grounding points of the amplifiers is at least 15 cm. If this method fails to protect against interference, you can try to use grounding at one point, but this happens extremely rarely. When using grounding at one point, it is best to bring short, smaller cables into the power distributor, and use a thick cable (the same gauge as the “+” circuit) to connect it to the vehicle body. If the distributor is not used for grounding and the terminals of different cables are connected on one bolt, then the following rule will help: the terminal of the most powerful amplifier should be lower (closer to the car body), and the less powerful one should be higher (closer to the bolt head).

CONNECTING TO THE HEAD UNIT Having dealt with the power wiring, it’s time to start supplying the music signal from the head unit to the amplifiers. For this purpose, interconnect cables with RCA connectors are used, which are commonly called RCA cables. They transmit the so-called line level signal. It is best when the number of linear outputs on the head unit (car radio or CD receiver) matches the total number of linear inputs on the amplifiers. If this number is less than or there are no linear outputs on the head unit at all, then you can try some tricks. In a complex system where multi-band amplification is implemented (that is, separate amplifier channels are assigned for each emitter in the speaker system), the best solution may be to use a separate active crossover. This device is capable of receiving only one pair of signals from the head unit, and at the output giving several filtered ones at once: for HF, MF, LF/MF heads and a subwoofer. Thus, an active crossover filters the signal, allows you to increase the number of line outputs, and in addition, in most cases, increases the level of the line signal, allowing you to better cope with interference. Another way to make up for the missing line outputs is to use line outputs on amplifiers, which can now be found in the vast majority of models. The point is that amplifier A can provide amplifier B with the same signal that it itself receives from the head unit. Sometimes the line outputs of amplifiers make it possible to receive even a filtered signal, so there is no need for the expense of an external active crossover. Moreover, when using amplifiers of the same series from the same manufacturer, connecting through the linear outputs of the amplifiers allows you to make some adjustments to all devices of the system simultaneously - from the device that is designated as the “main” or “master”. You just have to take into account that if a filtered signal is taken from the linear output of one amplifier for another amplifier, which is also capable of filtering, then turning on filters of the same type (low-pass filter or high-pass filter) at the same cutoff frequency for both devices is not only pointless, but also harmful . For example, if amplifier A works with the main speakers and a signal is sent from it through the linear output to amplifier B, which works with a subwoofer, you need to turn on the low-pass filter for the subwoofer either at the linear output of amplifier A or amplifier B, but not at the same time. Finally, the worst method is to use passive line-level signal splitters (so-called Y-adapters, or splitters). This is the easiest way to get two RCA connectors from one, but keep in mind that after such separation the signal level drops. If the head unit does not have linear outputs, then all that remains is to do the same as in a system with one amplifier: either use signal converters from a high level to a linear one (for amplifiers without high-level inputs), or - and this is much better - try contacting a specialized service and equipping the head unit with linear outputs is a very simple and inexpensive operation.

REMOTE TURNING ON AMPLIFIERS In addition to power supply, any amplifier requires a special 12 V signal in order for it to turn on. This circuit is called “Remote” or “Rem”. A special connector for sending a signal to remotely turn on amplifiers is available on the vast majority of head units (if it is not there, then the activation circuit for an external retractable antenna can handle this quite well). However, it must be taken into account that it is not recommended to install more than two amplifiers in the remote switching circuit. The fact is that in the head unit the “Remote” circuit is organized in such a way that the maximum current consumed from it does not exceed 500 mA, while each active element of the system (amplifier, active crossover, equalizer, etc.) consumes through the “Remote” circuit ” on average 125 mA. Moreover, the older the amplifier, the higher this figure. If the total current consumption in the “Remote” circuit exceeds the capabilities of the head unit, then component failure cannot be avoided. The best solution in these circumstances is to use a relay. It receives a low-current signal from the head unit in order to close its own +12 V circuit, the signal from which is fed to the “Remote” circuit of the amplifiers, and in this case there will be no current limitation.

How to connect a 4 ohm sub

Connecting a subwoofer at 4 is considered the most common, since most dynamic heads have such resistance, and all types of low-frequency amplifiers allow the use of such speakers as a load. You can organize a 4 ohm load using two 2 ohm speakers connected in series, when the plus of one speaker is connected to the minus of the other. The connection diagram for a subwoofer in 4 can be obtained using a two-winding speaker. Depending on their resistance, the connection configuration depends. Two coils of 8 connected in parallel will give, as a result, the required 4 Ohms. The same resistance is obtained if two voice coils with a resistance of 2 ohms are connected in series.

In the connection diagram for a subwoofer in 4, the minus of one voice coil is connected to the plus of the other winding, and the remaining free contacts are connected to the output of the low-frequency amplifier, observing polarity. Connecting two subwoofers of 4 is carried out in parallel or in series. Connecting a subwoofer 4 4 in 2 will provide increased power almost twice. The series resistance of the windings will be 8 Ω. The power will be reduced, but the bass performance will be bright and clear.

Types of amplifiers

All modifications of amplifying devices are divided into two types:

analog - receive a signal in the form of alternating current and voltage, which varies depending on the audio frequency, then amplify it before outputting it to the speakers;
digital - work exclusively with signals in digital format (ones and zeros, or pulses in the “yes/no” format), increase their amplitude, and then convert them into analog form.

Devices of the first type transmit sound unchanged. In terms of sound purity, only live performance can be better than analog. However, the recording itself must be perfect.

The second type of device slightly distorts the original recording, clearing it of minor noise.

The difference in the operation of these two types of amplifiers can be felt if you connect them to a vinyl record player. A music lover will choose the first type of amplifier, because the sound in the speakers in this case will be more natural (with a characteristic, barely perceptible needle creaking). However, when playing music from digital media (disc, flash drive, memory card), both types of amplifiers work equally.

The difference in this sound can be heard in the following video experiment (listen with headphones):

Digital sound vs. Analog - Furry Eee experiment!

Watch this video on YouTube

Car amplifiers are also distinguished by the number of channels:

single-channel – used to connect a subwoofer with a maximum resistance of up to 2 ohms, often have low frequency adjustment;
two-channel – can be used to connect two speakers or one subwoofer with a resistance greater than 2 Ohms;
four-channel - replaced three-channel ones due to their impracticality, this type of amplifier is the most common, because you can connect either four speakers or two speakers and one subwoofer to them;
five-channel – four speakers and one subwoofer are connected to them;
six-channel - used only if the subwoofer has a higher resistance than the maximum permissible value of the previous modification.

How to connect a subwoofer to a standard radio?

There are three options for connecting a subwoofer to a standard radio: output a linear output from it, use a separate high-level converter, or connect to the high-level inputs of the amplifier. Let's look at them below.

First option

In the first option, a procedure is performed that is called “unsolder the rulers.” In this case, the head unit is removed from the car, disassembled, and linear low-level outputs are output from its board.

They look like two regular RCA connectors. After this operation, you can connect an amplifier to them, and a subwoofer to the amplifier.

The process of removing the standard radio may be a little difficult. At first it seems like an impossible task. In fact, everything is simple here. You just need to read the instructions, if there are any. Or find a guide on the Internet for removing the GU. Often people post photos or videos that will help you with this.

Usually, in order to remove the standard radio, you need to disconnect the adapter frame, if necessary. Then, using two or four knitting needles, which are inserted into small holes on the radio, the latches are snapped off and the control unit is removed. Instead of knitting needles, you can use other available means, for example, thin metal strips or something else, depending on the model of the head unit.

Second option

The second option is even simpler. For an amount that can range from $20 to $100, you purchase a high-level converter, which is a plastic box with wires sticking out of it.

On one side there are “tulips”, on the other there are wires for acoustics. For example:

Audio Control LC7i,
Connects 2
Hollywood HLC 3,
Helix AFC Competition,
Helix AAC Active,
Carpower FGA 22HQ,
Stinger SG N12 and other similar models.

Then you need to find the wires going to the rear speakers. They can be detected directly at the output of the head unit. To find out what wires you need, look for the pinout for your GU model.

Third option

The third option is to connect the wires going to the rear speakers to the high-level inputs on the amplifier, if available. If the subwoofer is active, that is, with a built-in amplifier, high-level inputs may also be present in it.

You can find the speaker wires that go to the rear speakers in the same way as in the second option. Moreover, cutting them off completely is not necessary. It is enough to remove the insulation and, without cutting the cable, connect the subwoofer amplifier.

If the speakers are in the rear doors, you don’t have to turn them off, but listen to them first.

Good nutrition is the key to success

The amplifier connection procedure begins with the power wires. Wiring is the most important element of a car audio system; the volume and sound quality depend on it. Amplifiers need a stable power supply, otherwise the power will not be enough and the sound will become distorted.

To understand why you need to pay attention to the quality of wiring and how it affects the sound reproduced by a loudspeaker, you need to know what a music signal is.

Some suggest that it represents a sine wave, however, the musical sinhala is characterized by a large difference between the normal and peak value. If sharp signal bursts are not important for car speakers, then in the case of an amplifier the situation is completely different. If the signal exceeds the permissible power for even a second (or even a millisecond), then these “anomalies” will be audible even to those who cannot boast of a good ear for music.

If the car amplifier is connected properly, the signal will flow through the wires undistorted. Carelessly done work or incorrectly selected wire cross-section will result in the sound being more compressed, rough and sluggish. In some cases, wheezing may also be clearly audible.

How to choose a wire cross-section?

Wire is the most common metal with a certain level of resistance. The thicker the wire, the lower the resistance of the wire. To avoid sound distortion during large voltage fluctuations (for example, when playing powerful bass), you must install the correct gauge wire.

An amplifier is considered to be a rather electrically intensive device. For its effective operation, high-quality grounding is necessary so that it is possible to receive the necessary energy from the battery. To choose the correct wire cross-section, you need to make some calculations. First, look at the instructions for the amplifier (or directly at the box from the manufacturer, if there is no documentation, use the Internet) and find the rated power value (RMS) there. Rated power is the signal power an amplifier can deliver over an extended period of time to one channel of 4 ohms.

If we consider four-channel amplifiers, they usually have a power of 40 to 150 watts per channel. Let's say that the amplifier you purchased produces 80 watts of power. As a result of simple mathematical operations, we find out that the total power of the amplifier is 320 W. Those. How did we calculate this? It’s very simple to multiply the rated power by the number of channels. If we have a two-channel amplifier with a rated power (RMS) of 60 W, then the total will be 120 W.

After you calculate the power, it is advisable to also determine the length of the wire from the battery to your amplifier and you can safely use the table to select the required wire cross-section. How to use the table? On the left side the power of your amplifier is indicated, on the right you select the length of the wire, go up and find out what cross-section you need.

The table shows the cross-sections of copper wires, remember that a large number of sold wires are made of aluminum coated with copper, these wires are not durable and have more resistance, we recommend using current copper wires.

Fuse selection

In order to secure the connection of the car amplifier, it is necessary to protect the power supply from the battery to the amplifier using a fuse. Fuses should be placed as close to the battery as possible

It is important to distinguish between a fuse that protects the device itself (whether it is an amplifier or a radio) and a fuse installed on the power wire

CORRECTLY CONNECTING A SUBWOOFER TO AN AMPLIFIER

The subwoofer is connected to the amplifier using a car audio converter (adapter, adapter). This is a small device with a pair of RCA outputs and two pairs of wires, two of which are used to connect a dynamic emitter. The rest of the wires can simply be hidden - they are not needed for now. The line output wires (RCA OUT) must be connected to the amplifier.

The principle of connecting a subwoofer to a single-channel amplifier

To connect a car subwoofer to a mono amplifier, you will need to connect the positive and negative voltage wires from the amplifier to the same terminals of the subwoofer - that's all. Connecting several passive subwoofers is a little more complicated. Their connection is carried out in a parallel or series circuit, but with the obligatory precise calculation of their internal resistance.

The principle of connecting a subwoofer to a two-channel amplifier

In this option, the connection is made using a bridge circuit. This connection technology works great with virtually all two-channel amplifiers, to which you need to add another subwoofer. Here, too, everything is simple - we take the positive wire from one channel, and the negative wire from the 2nd channel and feed it to the corresponding terminals of the subwoofer.

When making this connection, special attention should be paid to the internal resistance of the subwoofer, which should be 4 ohms. In addition, you should take into account that with this option, the output power of both channels is added. If the amplifier has the function of switching mono and stereo modes, then in this case the wires are connected to the positive and negative terminals of one channel

If there is a need to connect two subwoofers to the amplifier, then the speaker cable from them is fed to different channels.

If the amplifier has the function of switching mono and stereo modes, then in this case the wires are connected to the positive and negative terminals of one channel. If there is a need to connect two subwoofers to the amplifier, then the speaker cable from them is fed to different channels.

For correct and clear operation of the subwoofer, you should provide an LPF low-pass filter, which will set the upper limit of the low frequency.

The principle of connecting a subwoofer to a four-channel amplifier

The standard connection of a speaker system to a four-channel amplifier is considered to be a scheme with two speakers and one subwoofer.

So, the typical way to connect an audio system to an amplifier would be the option of two speakers and a subwoofer. In this case, the sub is connected to the amplifier via a bridge circuit, and the audio speakers are each connected to their own channel. The peculiarity of this connection is that the speakers must work with the front channels, and the sub with the rear ones. But at the same time, it is possible to connect a pair of subwoofers to different rear channels.

Connecting the subwoofer

Most often we have to deal with subwoofers that are part of speaker systems of different configurations - 2.1, 5.1 or 7.1. Connecting such devices, since they are designed to work in conjunction with a computer or DVD player, usually does not cause difficulties. It is enough to determine which connector this or that type of speaker is connected to.

Read more: How to turn on sound on a computer How to connect a home theater to a computer

Difficulties begin when we try to turn on a subwoofer, which is a separate speaker purchased in a store or previously included in another speaker system. Some users are also interested in the question of how to use powerful car subwoofers at home. Below we will discuss all the connection nuances for different types of devices.

There are two types of low-frequency speakers - active and passive.

Option 1: Active woofer

Active subwoofers are a symbiosis of a speaker and auxiliary electronics - an amplifier or receiver, which, as you might guess, is necessary to amplify the signal. Such speakers have two types of connectors - input for receiving a signal from a sound source, in our case, a computer, and output for connecting other speakers. We are interested in the first.

As you can see in the image, these are RCA or “Tulip” type jacks. In order to connect them to a computer, you will need an adapter from RCA to miniJack 3.5 mm (AUX) of the “male-male” type.

One end of the adapter is connected to the “tulips” on the subwoofer, and the other to the connector for the low-frequency speaker on the PC sound card.

Everything goes smoothly if the card has the necessary port, but what happens when its configuration does not allow the use of any “extra” speakers other than stereo?

In this case, subway exits come to the rescue.

Here we also need an RCA – miniJack 3.5 mm adapter, but of a slightly different type. In the first case it was “male-male”, and in the second case it was “male-female”.

There is no need to worry that the output on the computer is not specifically designed for low frequencies - the electronic filling of the active subwoofer will “separate” the sound itself and the sound will be correct.

The advantages of such systems are compactness and the absence of unnecessary wire connections, since all components are placed in one housing. The disadvantages follow from the advantages: this arrangement does not allow you to get a fairly powerful device. If the manufacturer wants to have higher performance, then the cost increases along with them.

Option 2: Passive woofer

Passive subwoofers are not equipped with any additional units and for normal operation they require an intermediate device - an amplifier or receiver.

The assembly of such a system is carried out using the appropriate cables and, if required, adapters, according to the “computer - amplifier - subwoofer” scheme. If your auxiliary device has enough output jacks, you can also connect a speaker system to it.

The advantage of passive low-frequency speakers is that they can be made quite powerful. Disadvantages - the need to purchase an amplifier and the presence of additional wire connections.

Option 3: Car subwoofer

Car subwoofers, for the most part, are characterized by high power, which requires an additional 12 volt power source. A regular power supply from a computer is perfect for this.

Please ensure that its output power matches the power of the amplifier, external or built-in. If the power supply turns out to be “weaker”, then the equipment will not use all its capabilities

Due to the fact that such systems are not intended for home use, their design has some features that require a non-standard approach. Below is an option for connecting a passive subwoofer with an amplifier. For an active device, the manipulations will be similar.

Conclusion

The subwoofer will allow you to get more pleasure from listening to your favorite music. Connecting it to a computer, as you can see, is not at all difficult; you just need to arm yourself with the necessary adapters, and, of course, the knowledge that you received in this article.

Describe what didn't work for you. Our specialists will try to answer as quickly as possible.

How to connect 2 amplifiers in a car

Here are some of the most common subwoofer connection diagrams. Only with a serial connection we get 8 Ohms, and with a parallel connection - 2 Ohms.

Basic principles. There are many connection options, but the principles are still the same. If you need a lot of loud bass, then turn it to the minimum that the amplifier can provide, and if the overall sound quality of the system comes first, then it is 2 Ohms or 4 Ohms, depending on the power output.

Using the available space, we put the element on the bend of the tunnel, then add an element that was also the wall of the tunnel and the chamber with the electronics. Let's be clear about what we can connect as a load to a 2-channel amplifier, and what we absolutely cannot. It's a completely different matter if the subwoofer has two voice coils or two or more of them.

Ready-made sets of interconnect wires always include a control cable. They will be able to withstand W.

Read more: Connect the site to electricity

Terminology:

The process of creating the perfect audio system is constantly evolving, so hobbyists resort to clever tricks to achieve their goals. Connecting a passive Let's consider a sequential algorithm for installing a device. Connection diagrams for two amplifiers in a car are performed in several variants; let’s look at each of them in more detail.

Here are some of the most common subwoofer connection diagrams. To strengthen it, we will tighten the speaker chamber with a T-shaped element. A prerequisite for any method remains the installation of a fuse, the fuse link of which is designed to burn out when the maximum current increases by 1.2 -1.3.

Need help!!! connecting a 2 ohm sub!

There are a great many connection options, it all depends on the number of subwoofer speakers, the resistance of the subwoofer voice coils and the capabilities of the amplifier. If you have already connected a subwoofer, connecting speakers is not possible!

Basic principles. If you did not apply a frequency filter, then a signal from the entire frequency range would be supplied to the dynamic heads - from low frequencies to high frequencies. After purchasing a subwoofer or amplifier, check the quality of the standard wire included in the kit. I hope everything is clear with this, let's move on. Typical car audio system circuits: two-way (two-way audio system)

Why and who needs it

This is information for those naive who do not yet have a second amplifier, and have not even thought about why this is needed. Because for someone who suddenly became the owner of a second amplifying device, the question “why” no longer arises. Nor does it stand before those who have already thought about the need to purchase.

If you connect 2 amplifiers to the radio, you can get the following bonuses:

Improve sound quality by dividing “users” into channels. Connecting two amplifiers and using a crossover allows you to separate the output signal separately into high-frequency speakers, separately into midbass (MF), and separately separate the “rear” - low-frequency speakers or a subwoofer.
Bridging 2 amplifiers increases the output power to the speaker. The scheme “one amplifier is good, but two is more powerful” works here. When connecting amplifiers using a bridge method, do not forget to think about additional cooling of the devices: increased power also increases the load on the device.

How to do it?

Before asking yourself the question of how to connect 2 amplifiers to 1 radio, you need to, taking into account the above, determine what is more important - better sound or powerful sound. Theoretically, bridging two amplifiers slightly degrades the sound quality. In practice, it is difficult to detect a significant decrease in quality.

There are several options for connecting two amplifiers per channel. Each option has its pros and cons. Let's look at some options:

GU – responsible for Twitter;
two-channel amplifier - behind the front speakers;
single-channel amplifier or monoblock - for the subwoofer;

This is the simplest scheme, and as a result, it does not represent anything special.

a four-channel amplifier is connected to high-frequency tweeters and midbass;
a single-channel amplifier is connected to low-frequency rear speakers;

This connection method can be considered the most common. The system is easy to configure and can be upgraded by replacing components.

a two-channel amplifier after the GU operates with high frequencies;
three-channel – with midbass and subwoofer;

Separate control of the high-frequency component of the speaker system improves overall sound quality.

In addition to these three main options, you can create several more compositional diagrams of the car acoustics system.

By the way, you can achieve the same results in a much simpler way, and as a result, at a lower budget. Replace the entire garland of amplifiers with one, but six-channel one: dividing the high-frequency segment, midrange speakers, and subwoofer. Space saving - you only need to find it to accommodate only one device, easy to connect - cables need to be pulled to only one device, easy to manage. But we are not looking for easy ways, are we?

What difficulties may arise

Both the channel and bridge connection methods entail a number of problems, without solving which the whole undertaking becomes meaningless. And the list of problems is quite long:

Method of connecting power to both amplifiers. There are two ways to connect amplifiers to power: each with a separate cable through an individual capacitor, and installing a single capacitor on both devices. The choice of power supply depends on the power of the connected devices and the tasks assigned to this combination.
The quality of power supply to all system components. It's no secret that a powerful sound system in a car requires a lot of energy consumption. Therefore, before you start implementing devices and buying missing components, carefully evaluate the capabilities of your car.
Connecting an RCA cable to two devices;
Synchronization of remote control of two amplifiers;
Requirements for the Head Unit: the presence of filters, an adjustment system, additional linear outputs;
To ensure the required sound quality and trouble-free operation of the entire system, the requirements for the Head Unit are quite high. Preference should be given to processor models.
The need to organize additional cooling of the entire system;
Availability of free space in the car;
The need to install a capacitor - two amplifiers can significantly “drain” power;
A “beard” of wires, and as a result, the need to place it somewhere and protect it from interference that creates interference;
Increased requirements for amplifiers with a bridge connection - models of the lowest price group are not suitable for this role;

If you are not going to stop there and want to further improve the overall sound of the entire speaker system, you can try connecting 3 amplifiers in series to the radio, highlighting separately the high, mid and low frequencies. But you understand: this will increase all of the above problems. And the devices for organizing such a scheme will require high-quality devices.

For those who have firmly decided that there should be a second amplifier (or already have one), we offer to see how you can connect 2 amplifiers to a radio in the video.