How to connect a car amplifier with your own hands

Pre-calculate the entire length of the wiring and add about 40 centimeters as a reserve.

Professionals use a monoblock 1-channel amplifier or several monoblocks combining them into a bridge for more powerful sound in the car.

Another wire is designed to control the subwoofer. How the AUDIOBAHN subwoofer pumps with a Sony 3f drive/No landings

To do this, you need to use a resistor with a resistance of 1 kOhm.

But the extra length is also not needed - one meter of reserve is enough.

So: First, under the car trim, from the amplifier to the radio, lay a signal cable. If a bridge connection for the amplifier is not provided, you need to think about how to connect the amplifier and subwoofer to the car radio, doing it so that the signal is summed.

If the amplifier is not working, there may be a certain level of constant voltage at the output that will burn your speaker, and there will be terrible smoke: so you do everything at your own peril and risk Avtousilok. If a bridge connection for the amplifier is not provided, you need to think about how to connect the amplifier and subwoofer to the car radio, doing it so that the signal is summed.

Ready-made sets of interconnect wires always include a control cable. Car audio at home. How to connect amplifiers, acoustics, subwoofers?

Connection

After studying the types and types, we move on to the question of how to connect a subwoofer to a car radio without an amplifier:

To start connecting an active subwoofer, first we find two inputs on the back panel of the car radio, then using a linear wire we connect the input of the head unit to the subwoofer input. Then we connect the power - to do this we stretch the power wire from the “plus” terminal of the battery to the subwoofer A “negative” » we connect the subwoofer and the battery with a wire. When connecting an active subwoofer to a car radio, it is necessary to install an additional (very important) component - a fuse. It should be installed near the battery itself. The installation diagram of a subwoofer without an amplifier is shown in the first picture of the article. When low-frequency sounds are played, the subwoofer's electrical power consumption increases significantly , as a result of this, the load on the elements supplying the on-board network of the machine increases. Therefore, for the safety of the power circuit, an additional capacitor is installed in the subwoofer power circuit

• After connecting the subwoofer to the car radio, we proceed to setting up our speaker system
• As a rule, the whole setup comes down to creating a limit for the upper limit of operation for the woofer, then choosing the correct oscillation phase for the speaker

Now, how to connect a subwoofer in a car without an amplifier, you usually have to completely redo the audio power system, so here is an approximate list of necessary purchases:

• 5 meters 8AWG power cable(red)
• 1 meter of cable 8 AWG black
• 5 meters of control cable (thin) with a cross section of 0.75 mm
• Fuse holder FH58
• 40 Amp fuse
• Interconnect cables
• 2 meters of tubing
• Terminals and ties

The circuit of the sound system is simple, so there is no point in describing it in full, see the first photo of this article:

• The fuse is placed 10-15 centimeters from the battery, throw the power cable into the tube
• All cables inside the cabin are laid under the carpet

Subwoofer terminals

How to connect a subwoofer in a car without an amplifier - see the designation of the outputs on the subwoofer:

• +12V output is power (supplied only to the battery through a fuse)
• REM is the control wire, it comes from the radio, and connects to a blue/white wire (for Pioneer car radios, if you have a different one, then see the radio connection instructions), which usually sticks out of the bundle of wires coming from the radio
• The GND terminal is ground (negative wire)
• LOW INPUT contact (under tulips) - RCA wires are connected (to the subwoofer from the radio, if any)
• HI-INPUT contact - connect here if there are no RCA outputs on the radio

Now it’s clear how to connect a subwoofer to a car without an amplifier, all that remains is to wish you success in this matter; to better understand the topic, we recommend watching our training video.

Process and connection diagrams

In order to correctly navigate how to connect a subwoofer, it is worth understanding what type of equipment the purchased model should be classified as. They come in 2 variations: active and passive. When studying popular schemes for connecting subwoofers in cars with settings for a standard radio, you need to focus on such points as:

Are you a car driver?! Then you can take this simple test and find out. Go to test »

• the frame and amplifier (overall parts) should be located as compactly as possible, and you need to think in advance where to place them;
• take care of good cooling (during operation, powerful heating occurs, so the air must circulate freely);
• stop a short circuit (if there is no analogue for communication and control wires, then the program will need power from the battery).

The System Remote Control format is also required for control: without it, the connection diagram will not work. When the device a priori does not have this output, it is advised to route a continuous flow of volts directly to the beginning of the subwoofer.

What you need to connect

To effectively organize the connection of a capacitor in a subwoofer on your own at home, you should prepare the following set of tools:

• tongs (construction) and knife;
• wrench and adjustable wrench;
• electrical tape (or something similar for temporary fixation);
• pliers;
• wiring (battery, “tulips” and “+” wire);
• plastic ties and pullers;
• power and speaker cables;
• fuse (minimum 60A).

During installation, special attention should be paid to the selection of elements for feeding the subwoofer and cable for acoustics. This depends on the category of transport and the availability for subsequent installation of wiring directly under the decorative trim of the car dealership. The cross-section is closely intertwined with the power of the kit or amplifier: the current strength must match the power cable and not reach overheating.

Connecting a passive subwoofer

The algorithm according to which a passive subwoofer is connected looks like a special design that includes 1 or slightly more low-frequency speakers, a set of filters and an amplifier. They are combined into a single body, which is made of plywood or wood (dense base). If you want to connect a passive subwoofer to the receiver, you will have to spend about 1-3 hours, which depends on your personal skills and the condition of the car.

The procedure consists of the following steps:

1. Before starting work on the battery, remove the terminals (which will automatically eliminate the possibility of a short circuit).
2. You need to find the hole made, which is covered with a plug. On domestic transport it may not be observed, and you will have to additionally make a hole and seal the seal with sealant.
3. To combine with a radio, you will need “tulips”, as well as a spare wire that allows you to control the power.
4. “Tulips” are connected in accordance with the colors of the connectors. To connect the subwoofer and equipment in parallel, use the required “+” wire.
5. The wiring under the hood should be placed in a standard harness and carefully brought into the cabin; Think in advance about how the power cable will be installed.
6. Sometimes it will be necessary to temporarily remove the interior trim and sill trims to avoid pinching or kinking.
7. After the final installation, all used parts are attached back to the body through the hole. And connecting a passive subwoofer with power is oriented towards polarity.
8. You should find the location of the terminal and connect it to the power cable of the built-in radio.

All that remains is to configure the connection of the subwoofer to the receiver. When changing the settings of a two-channel amplifier to share power, all channels are connected to one device.

The capacitor does not need to be used at all: this part is only necessary when the amplifier has a maximum power above 400 W. But setting up a subwoofer in a direct connection will provoke a large consumption of energy, which will lead to rapid discharge.

Without amplifier

Sometimes it is necessary to activate a connected passive subwoofer directly to the equipment, without adjacent amplifying additions.

It is possible to set up a connection this way, but it is necessary that the entire frequency line goes to the dynamic head instead of low copies.

Then the signal to the subwoofer is dialed from any of the radio channels.

Direct connection to a monoblock - sometimes a central type amplifier can fail, since the resistance can be of different calibers, which leads to an overload of the output in the radio.

Connecting an active subwoofer

An active sub is a pre-prepared acoustic unit that includes not only a speaker and a filter, but also a device amplifier. It is much easier to connect such equipment, and the quality of the melody is superior to the passive analogue. Although, according to the act, the sound level depends on how well the connection is made. The most reliable way to set up an active subwoofer is a primitive sequence of steps:

1. Disconnect the car and then remove the terminals from the battery.
2. Lay the power cable to the subwoofer fixation point, while the cable itself should preferably not remain under the pedals or interfere with neighboring mechanisms.
3. Leave the fuse close to the battery. There is no need to connect the power cable to the battery terminal.
4. Remove the original radio and carefully inspect the rear panel to find the linear output for low frequencies and the control wire.
5. To connect an active subwoofer to the radio, you should lay the acoustic elements and the REM wire under the casing and secure them firmly.
6. The grounding must be taken from the metal surface of the car body, the twisting area must be isolated and the device must be installed in its normal location.
7. Finally, it is worth connecting the power cable directly to the “+” terminal of the battery and ensuring a large cross-section.

When the active subwoofer radio is immediately supplemented with a special connector in the connection diagram, the switching will be much easier. Then it is enough to install a coaxial cable with a connector: on the first side the wire will connect to the SubOut output, and on the opposite side - to Lineln. Connecting an active subwoofer to the receiver features a built-in amplifier, which makes it possible to save space in the vehicle.

Without line output

Sometimes car enthusiasts find themselves in a situation where attempts to connect a subwoofer to a standard radio are met with a problem in the form of a lack of communication with a passive amplifier or an active program. But there is no need to replace equipment in a car without a linear output. You can configure the device through an alternative input, as a spare signal level converter. A high-level stream is taken from the adapter to the amplifier. Depending on the type available, the feed can be controlled if necessary (for the sake of disappearing distortion).

Connecting from a computer to a radio

When the standard supply of standard melody in a car is not satisfactory, and you need ways to quickly improve the sound, then a good solution is to try to connect a subwoofer directly from a computer.

The device can be configured in 2 ways: by supplying power via a 12/220W inverter or through any contacts (+12W) on the board.

A tester and minimal knowledge of radio electronics will help you connect it correctly. Having orientated yourself with the battery, you need to send an audio signal to the subwoofer, having previously arranged it from the straight-line output of the equipment using a screen cable of the requested length.

Through crossover

This replacement duplicates the filter, dividing frequencies into ranges and thereby improving the sound level in the car radio. They are not only active and passive, but also one- and two-way. Each drive option has its own advantages and disadvantages, as well as price.

It is worth paying attention to their location:

• passive ones are configured in front of the speakers, 1 piece is enough;
• active crossovers are placed opposite several amplifiers.

The speakers themselves need to be connected to the subwoofer with a separate channel wire. It is important to consider that if you do not use a frequency filter when connecting a subwoofer, the full range will be supplied - from low to high. And without separation, the sound will be worse.

Connecting two subwoofers

To connect two subwoofers, you need to connect their adjacent wires according to the standard principle: “+” connect to “+”, “-” to a similar “-”. It is necessary that the configured device be carefully matched to the relative technical characteristics of the other device. The pair connection can be:

1. Consistent. So the car owner will receive a total resistance of 4 ohms, and a large proportion of AB format amplifiers are designed only for a fixed resistance. The total power of the speakers is summed up.
2. Parallel. In a spare circuit, the final resistance size must be 1 ohm; this indicator is already considered critical for most AB type amplifiers, and for the neighboring class D it is the operating level.

In the process, everything depends on how to install the amplifier, where the 2 subwoofers in question will be connected in the future.

Why do you need an amplifier?

Multimedia head units have a built-in amplifier, which is not suitable for all car owners. Installing additional equipment allows you to clear the signal of interference and install additional speakers that improve the reproduction of low or high frequencies. When using an additional amplifier, the power of the generator and the capacity of the battery should be taken into account; to reduce the likelihood of voltage failure, electrolytic capacitors (storage) are used.

How to calculate power and choose

To select the equipment yourself, you need to calculate the power of the loudspeakers installed in the circuit of each channel. Based on the obtained values, an external signal amplification device is selected. It is recommended to purchase a more powerful device (10-15%) to reduce the load on the equipment and allow you to subsequently replace the acoustics. You should also take into account the resistance of the coils in the speakers and the frequency range for which the products are designed.

The choice of type of amplification machine installation depends on the configuration of the future speaker system. If you plan to connect a subwoofer to an amplifier, a device with 2 channels that are connected via a bridge circuit is sufficient. If the reason for the modification is the desire to get rid of noise in the speakers and increase the sound volume, you need to purchase a 4-channel unit. To use 4 speakers and a subwoofer at the same time, you will need to install a 5-channel amplifier or use 2 separate devices.

To connect the car amplifier to the radio, “tulip” or RCA connectors are used, located on the rear wall of the head unit housing. Before purchasing an external device, it is recommended to check the type of outputs used on the player. If there are no connectors, it is possible to switch the amplifier unit to standard acoustic outputs through a signal amplitude reduction module (attenuator).

Installation and connection steps

Most often, the amplifier is connected using wires directly to the battery. The external amplifier will be located in the trunk or interior of the car, and the wiring runs through the holes in the engine compartment. The wires must be well insulated with electrical tape.

The positive wire, almost always red, is connected to the positive terminal of the battery and plugged into the corresponding connector in the amplifier. And the negative wire, black, is connected to the body and inserted into the connector designated GND (GROUND). The remaining two sockets are used to connect the radio and signal cable. Almost all radios have outputs for connecting an amplifier and supplying sound to it.

For a four-channel amplifier, you need to use special adapters, and if the receiver does not have linear outputs, then the wire is laid directly to the speakers, where special inputs must be provided.

The wiring from the radio to the amplifier is laid inside the car, most often under the door trim. Under no circumstances should the signal cable be laid on the same side as the power cable. This will cause interference and loss of sound quality.

Another important factor when choosing the location of the amplifier is the distance from it to the acoustics. It is advisable to reduce it to a minimum so that the wires are as short as possible. In this case, the likelihood of interference during music playback will be minimal. https://www.youtube.com/watch?v=M42umT33V5o With the correct selection and installation of an external amplifier, you can significantly improve the quality of the sound reproduced by the radio, eliminate interference and increase the power of the radio.

Results

To install the amplifier, be sure to choose only high-quality wires; they should not have any damage. Be sure to follow safety precautions while working. Before installing the amplifier, you must read the operating manual and the instructions for the car radio.

A low-frequency power amplifier is the main component of a high-quality sound reproduction system. Everyone has an independent choice and the opportunity to connect it to the radio in the car. This is a difficult and troublesome task, but feasible for all car enthusiasts.

Serial and parallel connection

To connect a subwoofer speaker, use a serial or parallel connection. If the task is to connect two or more subwoofers, both serial and parallel connections can be used simultaneously.

When connected in series, the rated power of the coils is multiplied by two. For example, there is a subwoofer with two 2 ohm coils. By connecting them in series, we get a resistance of 4 ohms at the output. The connection itself is made as follows: from the amplifier, “plus” is supplied to the “plus” of the first coil, and “minus” is supplied to the “minus” of the second coil. The “minus” of the first coil and the “plus” of the second coil remain unused; a jumper is installed between them. This is demonstrated more clearly in the diagram below.

When connecting subwoofer coils in parallel, the rated power will be divided by two. For example, we have a two-coil subwoofer, each coil has a resistance of 2 ohms. Using a parallel connection, we get a resistance of 1 ohm at the output. The connection is as follows: the “plus” from the amplifier is supplied to the “plus” of the first coil, then a jumper is installed that transfers the “plus” from the first coil to the second, the “minus” is connected to the “minus” of the second coil. A jumper is also installed, which transfers the “minus” from the second coil to the first. For better understanding, please refer to the parallel connection diagram below.

How to connect two amplifiers with a bridge

Master/Slave

Amplifiers designed for this connection have MASTER/SLAVE switches. Therefore, with a bridge connection, one of the amplifiers will be the Master and the second will be the Slave, set the switches in this accordance. It is to the Master that the interconnect cables (tulips) from the radio are connected, and from it, through a mono connector, the signal is transmitted to the Slave (with a single interconnect). This is done so that all settings and control are carried out from one monoblock - from the Master, that is, gain, filters, subsonic, etc. will be exhibited only there. There is no need to take Y splitters to try to plug interconnects into the Slave as well.

If the manufacturer claims that the amplifier can operate as a bridge, but there are no Master/Slave switches, then it will have two sockets with similar names - Bridge Input and Bridge Output. In this case, use the Bridge Output jack on the master amplifier and connect it to the Bridge Input jack of the slave amplifier.

Connecting speaker wires

Here, be careful and do not confuse anything: we connect the negative connectors of the two amplifiers to each other; then we connect the plus (+) of the Master to the plus of the subwoofer, and the plus of the Slave to the minus of the subwoofer!

Yes, there are two positive wires going to the subwoofer, no need to strain - everything is correct. The fact is that a direct signal is supplied to the input of one amplifier, and for the second the signal is turned 180 degrees. Therefore, at the output of one the positive potential increases, and at the output of the second it is the same but negative. The increase in power occurs because the amplifiers or channels (in the case of using one wuxia) operate at reduced resistance. For example, if the sub is connected to 4 ohms, then each amplifier or channel operates at 2 ohms, etc.

How to set up an amplifier (Gain, LPF, HPF)

Setting up the amplifier for the subwoofer and the rest of the audio system can be confusing for a newbie. Fine tuning is not easy and requires a lot of experience or professional help.

On this page we will analyze the basic, basic settings - so that nothing burns out, the subwoofer does not try to play the violin and everything is in its place.

HPF / LPF (HPF / LPF)

Hight pass filter (HPF), also known as a high-pass filter (HPF), filters out (cuts off) low frequencies, leaving high ones.

When setting up a subwoofer amplifier, set the control to about 20 Hz to cut out infrasound and not waste energy, since you won't hear it anyway. For mid-range speakers, the HPF is set around 80 Hz to remove the low frequency range for which the speaker is not designed and will not be able to play it. If you have separate channels or even a separate amplifier for tweeters (tweeters), the HPF is set in the region of 3000 - 5000 Hz, depending on the model, so as not to burn them.

All figures given are approximate, to obtain more accurate and safe values, study the characteristics of your speakers!

HPF and LPF (useful article - (AFC) Amplitude-frequency response)

Low pass filter (LPF), also known as a low pass filter (LPF), is the opposite of HPF and cuts off the upper frequencies, leaving the lower ones.

For subwoofers, it is set in the region of 50-80 Hz, depending on the type of design (ZYA, FI, etc.) in order to cut off frequencies for which the subwoofer is not intended. The same goes for midrange drivers, cut them around 1400-1600 Hz.

If possible, you can limit tweeters to 20,000 Hz, but this is not necessary.

Gain\Level

Gain (sensitivity) is often confused with volume, but this is not entirely correct.

Gain is an adjustment of the amplifier's input sensitivity to match the radio. But let’s not get into the weeds and consider this setting from the point of view of what is useful for the user.

Sometimes the Volts (V) value indicated on the regulator can be misleading. The fact is that sensitivity is measured in Volts. The smaller V, the higher the sensitivity, the louder the speaker will play and vice versa.

To begin with, it will be useful to watch a clear video about how gain works on an amplifier:

Adjusting gain by ear (method 1)

Having a good sub link, do not use an equalizer and various bass enhancers, forget about bassboost on the amplifier - so before adjusting the gain, make sure that all this is turned off!

Set the control to minimum and play music that you usually listen to. Turn up the volume of the radio by 3/4 of the maximum; if you hear distortions in the sound of the subwoofer earlier, stop and turn down the volume a couple of notches. Go to the amplifier. Have an assistant slowly turn up the gain control until new distortion appears, and when you hear it, stop the rotation and turn it down by 10%.

Adjusting gain by ear (method 2)

If you don’t trust your hearing and are afraid not to hear changes during time, then use a more accurate method - using sinuses.

If you are tuning a subwoofer, then use 40 Hz, if your case is tuned above 40 Hz or you have a closed box, then take 50 Hz (download sines in the Downloads section). To set the gain for the midbass amp, use 315 Hz.

Sine or tone (in our case) is a tone signal of a certain frequency, changes in the sound of which you can easily hear

Set the gain to minimum, turn on your sine and turn up the volume of the radio. When changing the sound of the tone signal, stop and turn it down a couple of notches (set the maximum volume limit to this value if your radio has such a function). Go to the amplifier. Similarly to the first method, add gain. When the sound changes, stop and turn it down 10%.

Home amplifier from car

If not, there is a way out. Well, let's go: So, let's find out first of all what types of car subwoofers there are: 1 Active subwoofer. If you have a tester and you also know how to use it, then I think there is no need to say anything further, I’m sure you already know without me that you can measure the voltage at the output, and only then connect the sub - everything is really simple, but who doesn’t knows how to learn to work with devices in life it will be useful to measure the same battery, especially since a simple tester is not that expensive, literally a couple of thousand tenge Connecting a passive car subwoofer. In the absence of an amplifier, a passive subwoofer is connected to the front speakers.

Judging by the characteristics of the cheapest models that are now sold in stores, this is 12A. In this case, the amplifier is connected to the speakers, see

As you know, car radios have a special output, usually blue. Connect two pieces of cord to two terminals; 4. We also end the ring one on the car body, and the y-shaped one on the amplifier.

If you buy a good subwoofer but connect the subwoofer with thin wires, it will “fart”; it simply will not produce bass, this is explained by monstrous power drawdowns, the power supply on board the machine’s network drops from normal 14 Volts to Volts on the primary, on the secondary of the amplifier converter there are also drawdowns accordingly power and quality are lost. After completing the above procedures, all that remains is to connect the wires that transmit the sound signal from the amplifier to the subwoofer; the sound after amplification has greater power, so the cross-section of the wires must be appropriate. The passive one does not have a built-in amplifier - that’s why it’s called passive.

It has connectors for connecting a subwoofer. For them we set the mode to OFF. How to connect a car amplifier

Connecting the subwoofer to the radio

It is necessary to connect the subwoofer to the radio only through an amplifier. Since the built-in power of the radio is not enough for the subwoofer to work properly, you will not get normal bass. The connection chain is simple: radio-amplifier-subwoofer. The radio transmits the signal to the amplifier. The amplifier, in turn, amplifies this signal and sends it to the subwoofer.

What is an amplifier for?

The amplifier is used to increase the volume headroom, reduce distortion and improve the sound quality of music. The built-in amplifier of the radio is not enough to drive a heavy low-frequency speaker, which will cause large distortions, the volume level will be low and, with a high probability, the subwoofer may fail or simply “burn out.”

If you have an active subwoofer, then you will not need an additional amplifier, because it is already built into the subwoofer housing (more about active subwoofers). For a passive subwoofer you will have to choose an amplifier (read how to do this correctly on this page).

Setting up or how to make a case

How to properly set up an active subwoofer in a car

In order for a subwoofer speaker to function normally, it is necessary to make a high-quality housing for it. Its further sound depends on the quality of the subwoofer box:

• If the displacement of the box is incorrect, the speaker will not play. It will make sounds similar to wheezing.
• With a flimsy subwoofer box, it will be impossible to achieve clear bass. On the contrary, it will always be difficult to hear.
• It is necessary that the housing has the correct shape, otherwise “standing waves” may form inside it, affecting the sound quality.

Some of the best cases are those that are made to order. The manufacturer needs to provide the dimensions of the speaker or itself. Due to this, all the subtleties and nuances of the device will be taken into account, so the sound will not be primitive.

How to set up a subwoofer yourself

Active subwoofer how to set up

acoustic system Therefore, now we will discuss how you can set up a subwoofer yourself:

You must purchase a special disk. It will allow you to identify shortcomings of the entire speaker system, including the subwoofer itself. A special melody is recorded on this disc, which allows you to hear even minimal defects.

Special disk for setup

• It is necessary to adjust the active subwoofer until the sound of this disc is ideal for the user.
• What exactly is a setting? This is a sequential switching of three buttons: Bass, Tribble, Sub.

As you can see, installing a subwoofer and setting it up in a car can be done easily with your own hands. It should be borne in mind that such a process is impossible without primary preparation. So, initially you should look at photos with a similar theme. Perhaps you will find some instructions on the Internet that will also not be superfluous. A video on this topic will also come in handy. The price of installation and configuration in a car service can vary: installation of an active subwoofer starts from 3,500 rubles.

How to set up a subwoofer in a car

Setting up the subwoofer should be done while designing the speaker box. The main role here is played by the parameters of the speaker, which determine the boundaries of its functioning in the acoustic design. If you have a dilemma about how to set up a sub in a bass reflex enclosure, it is recommended to install the port both higher and lower, depending on your favorite type of music. And for a device in a factory frame, connecting a subwoofer with a bridge is limited, but with a well-chosen circuit it is more than possible to achieve good sound.

As a backup option, use special applications for your phone (Subwoofer Bass).

Setting up the LPF lowpassfilter filter

Nowadays, a classic LPF filter is almost always present on a subwoofer. This type of filter allows you to select the threshold at which high frequencies begin to be blocked, which allows you to simply mix the signal with other speakers. To properly configure the filter, you need to know in advance how this is done.

First, you need to make sure that the initial parameter was not too high, and that the woofers on the subwoofer do not overlap: this risks leading to unnecessary emphasis on one frequency level (about 120 Hz) and unclear sounding of the acoustics. But if connected too low, there may be a large gap between the car signal and the speakers.

At the start, it is recommended to set the LPF filter at a frequency of 80 Hz, and then conduct a sound test and change it as desired until it sounds as the owner requires. It’s better to deactivate the filter on the radio. When there is a chance to apply LPF on the main device, you need to activate it only there. You should not run the filter at the same time as the amplifier.

Setting up a subsonic

Subsonic is an infrasonic format filter that can block ultra-low frequencies that always appear in some compositions. These frequencies cannot be heard at a typical threshold because they operate below the threshold of human hearing. But when they are not initially trimmed, the device will consume additional energy through startup relative to the all-in-one.

You can set up an active subwoofer in your car, automatically blocking infra-low frequencies - the device will be able to effectively reproduce only those that are present within the established limits. Thus, unpredictable failure of a two-coil subwoofer after accelerated movement of the diffuser is eliminated.

The speaker will try to repeat frequencies that lie outside the perceptible range (20-25 Hz and below). Then the diffuser will speed up, which risks causing the two-coil device to exit near the gap and result in damage. Subsequently, the quality of reproduction of the required bass range increases in quality, in addition, the volume increases.

To tune the subsonic, you should set it at least 5 Hz below the level of the bass reflex port. To do this, turn on the switch and move it to the desired data. When the subwoofer is configured correctly, passengers in the car will not hear it, since it should not provoke interference with the central signal.

Setting the input sensitivity GAIN

Sometimes car owners do not know how to correctly adjust the input sensitivity. This value demonstrates how it is possible to apply a signal to the input in order to result in rated power. It should be adjusted for the incoming flow voltage. It is worth adjusting the input sensitivity correctly to prevent accidental signal changes, distorted sound, or other problems with the speakers.

To change the GAIN values, you will need:

• digital voltmeter, which can measure AC voltage values;
• test CD or file where a sine wave is saved with an initial level of 0 decibels (it is important not to use a weak test signal);
• instructions for the subwoofer for the car, which mentions the permissible output voltage.

You must disconnect the speaker wires from the unit and ensure that the bass, equalizers, and other settings on the head unit are turned off to get clear sound. The level of input sensitivity should be minimal, so it is better to switch to bridge mode. You can use an oscilloscope to collect more accurate data.

Acoustic phase

Many subwoofers are equipped with a “Phase” switch on the rear panel, which should be fixed at the 0 or 180° position. If you set the power switch to one side, the 2 conductors will transmit the music signal to the rest of the electronics in the same direction. You just need to flip the switch and, carefully adjusting the reception, change the position. Then the shape of the sound will be reversed. When you cannot use such an amplifier, you can swap the “+” and “-” wires on the speaker.

What you need to connect

First, the ability of the car amplifier to operate in bridge mode is checked. If this device is not designed for it, it will quickly fail due to overheating and overload. It is also worth considering that the operating resistance will change. With a bridged connection, audio will only be output from one channel.

To connect the amplifier you will need:

• speaker cables;
• power wires;
• speakers and subwoofer;
• fasteners.

How to choose a wire cross-section

Since the power consumed by the bridge car amplifier from the on-board network will increase several times, the cross-section of the wires used to connect the power supply must be at least 3 mm. This will help avoid sudden muting and distortion of the sound at high volumes.

The thickness of the speaker cables should also not be thin to ensure effective sound transmission through the bridge system.

Fuse selection

The fuse rating is selected based on operational reliability. If the burnout of an already installed fuse-link occurs frequently, then the rated current does not correspond to the increased energy consumption of the device.

A fuse with a higher value should be installed. You can also include an additional 30 A fuse in the positive wire gap to increase the protection of a two-channel amplifier connected via a bridge circuit from overload and short circuit.

Laying wires

Fixing the power cables and supplying audio signals becomes the initial plank during the adjustments made. Before starting installation, you should decide on the initial location for setting up the amplifier: according to the standard rule, the cable should be laid under 300 mm (including the spare part), and the laying itself should be left under the interior trim. At the same time, the wire can be connected to the battery terminals or to the power cable of standard electrical wiring (as an additional option).

Connection errors

An incorrectly installed audio system not only produces poor sound, but can lead to failure of the head unit, power surges in the on-board network, blown fuses, blown electrical appliances, short circuits and damage to the wiring.

List of common mistakes:

• An overpowered amplifier will damage the woofer. The main selection rule, which reveals the full sound potential of a subwoofer: the power of the amplifier should be less than the declared peak loads of the woofer. You can correctly calculate the amplifier rating using the formula: U – the voltage value of the vehicle’s on-board network with the engine running and powered by the generator = 14.4 Volts;
• I – nominal value of the fuse, or their total value in the case of several separate channels;
• Efficiency (efficiency factor) – constant value: class AB subwoofers – 50% (0.5), class D – 75% (0.75);
• n – number of independent channels of the device.

An amplifier with reduced power - the sensitivity range drops, the subwoofer cannot be “boosted,” and instead of a distinct bass, a background hum is heard. Incompatible radio and bass speaker parameters. If the head unit has a “Sub Out” pin, then the power is calculated using a similar formula as for an amplifier. The rating of the fuses in the system does not correspond to the peak load: if their value in Amperes is lower than necessary, then burnout will occur even at low powers. If the resistance is too strong, voltage surges in the on-board network and overheating of the electrical wiring occur. Incorrectly set polarity on the line outputs - the subwoofer does not turn on. Power and speaker cables do not correspond to network parameters - poor sound quality. Incorrect crossover or equalizer settings.

After installing the subwoofer into the speaker system, adjusting the low frequencies is carried out using a digital equalizer, bringing the speakers to peak loads. Modern devices have a wide range of capabilities and a range of different functions for adjustments (for example, bass boost adjustment, “Bass Boost”, noise reduction mode). Sound correction should be done carefully, not exceeding the signal level by 3 dB. It should be remembered that the increase in power to the woofer occurs multiple times: if you set the bass boost to +10 dB, then the power to the linear input register will be 14 times higher, resulting in overload, fuses blowing, and system components failing.

Four main types

The main types of subwoofers are:

• open;
• hull;
• active;
• passive.

An open subwoofer is the first option. It needs to be built into any of the car panels. This is a smart option for anyone who doesn't like to fiddle around for too long. There is a second option - case-based. It will have to be built into a special box. The calculation here must be accurate. This box increases the sound pressure on the speaker. The speakers are 100% engaged. With its help you can slightly adjust the sound.

There is also a distinction between passive and active. Passive is simple. It lacks an amplifier and crossover. It must be connected in parallel with other speakers. You can make a crossover yourself and include it in the system. But it’s easier to immediately install an active subwoofer, which has both an amplifier and a crossover. Connecting an active subwoofer to your car will solve many problems at once.

In addition, a passive subwoofer sometimes causes a quieter sound from the speaker system, which must be taken into account when making a decision. Active will give good volume. An amplifier and crossover simplify the wiring diagram. It is easier to install an active subwoofer with your own hands without experience, although some may disagree with this point of view.

The amplifier and crossover are important elements. Think about the available options, compare them with the final goal, which is drawn in the mind - rationally. If there is no time or desire to choose or think, in the worst case, an extra part may appear in stock, which is also not a disaster. The supplier or seller, alas, is not obliged to accept back the purchased item if there is no receipt, damage appears, and so on. The money spent could have been invested in something else, but you can always sell speakers, microphones, subwoofers to someone who really needs them. This will allow you to return most of the amount.

What is an amplifier for?

The sound quality will depend on how well the connection is made. There are various options for installing a stereo sound or audio system in a car. So:

• If you are not satisfied with the power of your car radio (see Compare car radios and choose the best) or the quality of the sound it produces, you can solve this issue with the help of an amplifier. Of course, this is not at all the same equipment that is used in sound systems that operate on a 220-volt power supply.
• There is only one battery in a car, and two in a truck or bus - 12V each. Amplifiers for cars are designed for such a low-power network. How do they increase the existing voltage?
• The fact is that a voltage converter is built into the car amplifier. Depending on the technical characteristics of a particular device, the converter, using a pulse, can increase the voltage from 12 to 100 volts. So, the amplifier independently provides itself with the required voltage.

Forum "Auto-HiFi"

Here you can see how to correctly connect www. Us Kex 1. Yes, nothing complicated, they correctly advised you to take a normal power cable, install a good battery, don’t turn on the sub all the way for the first time and change the amplifier over time. We advise you to think about the KG35 wire, at least for the sub from the battery, otherwise you may get burned in the cabin!

By Jandarm, November 24, in General questions. On the amp itself there is insane rock art, either 1 ohm minimum for all holes, or only for the two outermost ones.

How to connect

Connecting a two-channel amplifier using a bridge circuit is carried out in different ways depending on the radio, speakers and subwoofer used.

The connection method is also influenced by the number and characteristics of the components.

Radio tape recorder

The choice of the required method is determined by the connection diagram printed on the device label. Connecting the radio to a two-channel amplifier in bridging mode is carried out in the same way as to a standard one. There are 2 ways to transmit sound from the head unit.

In the first case, the connection is made using linear outputs. In the second case, the radio terminals intended for speakers are directly connected to the amplifier. If 2 amplifiers are used, then the linear output of the left channel is connected to the first, and the output of the right channel is connected to the second. The blue wire with a white stripe from the radio is connected to the input of the amplifier(s) power control relay.

Subwoofer

Before connecting a subwoofer to a two-channel amplifier, you should check its resistance. If the operating resistance of the amplifier is 4 ohms, then the subwoofer connected in bridging mode must have a resistance of 2 ohms. If these recommendations are not followed, the car audio system may become unstable.

To connect an amplifier to a subwoofer, connect its positive lead to the positive terminal of the left channel. The negative wire of the subwoofer is connected to the negative output of the right channel. As a result of this operation, the power of the sound reproduced by the subwoofer becomes higher. If you have a low-pass filter control, set the value from 100 to 250 Hz.

It is necessary to ensure that the speaker cones move in one direction. This provides the necessary sound quality at low frequencies. To carry out phasing, the subwoofers are connected in series.

After this, a AA battery is momentarily connected to the free wires. If the cones move in different directions, then the leads of one of the low-frequency loudspeakers change places. If it is necessary to connect both full-range speakers and a subwoofer, then a crossover is used for this.

Columns

Each bridged two-channel amplifier can only connect one speaker. It is worth considering that the sound of a car audio system in bridged mode will be monophonic due to channel combining. To get stereo sound in a car using the bridge method, there are several ways to connect 2 or more speakers to an amplifier.

One of them is to use another amplifier. Another is to connect the desired number of speakers in series to the bridged output. Full-range speakers are connected in the same way as a subwoofer. The high and low pass filter settings do not change. Thus, connecting a 2-channel amplifier via a bridge circuit will not cause any particular difficulties if the work is carried out correctly.

Setting up an amplifier for the front: how to connect via, step-by-step instructions

Many car owners do not know what tuning an amplifier to the front is. There are several options for self-adjustment. The choice of method depends on the needs of the driver.

What is front amplifier

Before connecting the front of the amplifier, you must carefully examine the panel. This will help determine the output to the subwoofers. There are anterior and posterior channels. The first ones are designated by the inscription REAR. The latter have a FRONT pointer. Rear channels are often called rear channels. The front is an amplifier for multi-channel audio systems.

How to connect the front

To connect the front through an amplifier, follow the step-by-step instructions. It consists of several successive stages. Otherwise, problems may arise if the car owner connects the system to the output of the rear speakers:

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1. Include wiring from the audio system speakers with the required connectors at the front.
2. Connect the radio by connecting the required cable to the player in the car.
3. Distributes a sound signal. The amplifier must independently supply a pulse to the subwoofer and high-frequency speakers. The same applies to mid-range speakers.

Connecting the front through an amplifier will help you adjust the desired parameters of the device. This will be extremely easy to do. Before setting up, you need to decide on the control options during the connection process. Each amplifier has a Crossover Selector. It is designed to switch filters. When the device operates in the LP position, it operates at low frequencies.

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If you connect the AP, the amplifier is with modifications deactivated. There is a special regulator on the rear panel. It is used to change frequencies at the cutoff of filters. The power is adjusted by using Level. It will allow you to select the desired level. Bass Boost enhances low frequencies.

Conclusion

Now you have enough knowledge to go to a specialized store yourself and go through all the procedures: purchases, consultations, connections and settings - on your own. If you are not burdened with financial difficulties, it would be better to purchase an active type device, and then you will not have questions about how to connect a subwoofer to a computer. However, if you want to save money, or the hidden talents of radio electronics have awakened in you, you can safely purchase components at a reasonable price and create a full-fledged speaker system with your own hands. In any case, with a subwoofer you are guaranteed a life with rich bass, a lot of pleasure and the indignation of your neighbors.

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