Powerful Hi-End headphone amplifier MS audio laboratory FHA 1.8

External Hi-End digital-to-analog converter DAC 1.0 SE Art. DAC 1.0SE

The external digital-to-analog converter MS audio laboratory DAC 1.0 SE is an improved version of DAC 1.0. Every circuit design in this DAC, from digital inputs to analog outputs, is optimized to produce the highest possible sound quality. The MS audio laboratory DAC 1.0 SE DAC can be connected to a CD or DVD player, DAT player, CD transport or any other digital signal source via 4 inputs: 2 digital coaxial 75 Ohms (RCA), 1 digital 110 Ohm (XLR) and 1 optical (Toslink). The DAC uses a proven chipset manufactured by Cirrus Logic and Texas Instruments (Burr-Brown): CS8416 – low-jitter digital signal receiver; SRC4192 – upsampler with wide dynamic range; PCM1793 is a DAC chip supporting 24-bit resolution at sampling rates up to 192 kHz. The output of the MS audio laboratory DAC 1.0 SE DAC has gold-plated connectors for balanced (XLR) and unbalanced (RCA) connection of devices. The distinctive features of MS audio laboratory DAC 1.0 SE include the following: 1. Each cable input is provided with transformer galvanic isolation, which allows you to get rid of “ground” circuits through cables connecting to digital signal sources. 2. The DAC uses a proprietary analog filter, which makes it possible to organize balanced and unbalanced output of equally high quality. The output analog filter also contains specially selected discrete J-FET field-effect transistors and high-quality OPA2111 (AD648) J-FET operational amplifiers. 3. The analog output of the DAC operates in Class A mode, which ensures excellent linearity. 4. There are no coupling capacitors at the output of the DAC 1.0 SE (there were in the DAC 1.0 model), which made it possible to improve the processing of low frequencies. 5. In the DAC 1.0 SE power supply, the topology of the filtering and voltage stabilization circuit of the analog part has been changed compared to DAC 1.0. 6. In the digital part of DAC 1.0 SE, the reference oscillator circuits have been changed. As a result, the stability of its operation has been increased and the timing accuracy of the DAC chip has been improved. 5. The analog and digital parts of the DAC 1.0 SE are located on two separate printed circuit boards and are equipped with separate power supplies, which minimizes their mutual influence. All components used in the device undergo preliminary testing and rejection. Field-effect transistors are selected in strict accordance with the specified technical characteristics. The power supply contains a specially designed custom toroidal transformer with a low stray field. For accurate signal transmission, all signal circuit connections are made with high-quality copper wire. The DAC body is made of steel and painted with black powder enamel. The front panel of the device is made of Corian® artificial stone produced by DuPont® (USA). By purchasing MS audio laboratory DAC 1.0 SE, you can be sure that even old and well-known recordings will find a new life.

* Included with the DAC 1.0 SE you can order cables for connecting the digital-to-analog converter to digital signal sources (coaxial, balanced) and to an amplifier (balanced, unbalanced).

Main technical characteristics of DAC 1.0 SE:

— dimensions (WxHxD) – 158x120x290 mm; — weight – no more than 2.5 kg; — supply voltage — 220-240 V AC; — power consumed from the network – no more than 4.5 W; — load resistance – at least 600 Ohms; — operating frequency range at the level –3/+0 dB — 1 ... 65000 Hz; — unevenness in the range 20…20000 Hz — – 0/+0 dB; — nominal output voltage — 2.1 V; — harmonic distortion at a frequency of 1000 Hz — 0.002%; — dynamic range – no less than 110 dB; — signal-to-noise ratio – no worse than 110 dB; — separation between channels is no worse than 109 dB.

Photo album

MS Audio Laboratory FHA 1.2 Test Report

General test results

General test results MS Audio Laboratory FHA 1.2

Channel

general*

Frequency response unevenness in the range 40 Hz 15 kHz, dB

-0,08, +0,02

Output impedance average in the range 40 Hz 15 kHz, Ohm

0,2

Maximum voltage level without load, V (rms)

N/A

Maximum power level obtained under load N/A Ohm, mW

N/A

Detailed description of technical characteristics in the table »

Calculate the SPL of headphones with an MS Audio Laboratory FHA 1.2 amplifier using an online calculator based on the data in the table »

The table shows the main, most important technical characteristics of MS Audio Laboratory FHA 1.2
Contents of the measurement report
Main results of testing the frequency response of the amplifier under resistive loads Frequency response of the amplifier under load of the dynamic type Deviation of the frequency response of the amplifier under load of the dynamic type Frequency response of the amplifier under load of the armature type (single-driver) Deviation of the frequency response of the amplifier under load reinforcement type (single-driver)

News

[11/16/2021] The problem of powering a High End audio system cannot be solved without providing power with clean mains voltage. The use of a specialized surge filter allows you to isolate the audio system from sources of interference in a 220 V network, protect it from possible strong impulse noise and short-term voltage increases and, as a result, reduces the likelihood of failure of expensive audio components. The mains audio filter MS audio laboratory PF 2.0 (Art. PF 2.0), in addition to filtering interference, provides elimination of a constant component, the presence of which can cause high background noise or humming of a power transformer. The new PF 2.0 device will provide high-quality clean power to audio devices with a current consumption of up to 10 A. The presence of a voltage drop compensation circuit on the filter allows you to power audio devices with mains voltage without drawdown, thereby ensuring excellent dynamics. The model is equipped with an overcurrent protection circuit for each output. Switching of the supply voltage is carried out by powerful electromagnetic relays. The surge protector's carbon fiber faceplate features a stylish digital output voltage indicator. Detailed information about the surge protector for powering audio equipment MS audio laboratory PF 2.0

located in the SOUND AMPLIFIATION section. The filter is available for order with several modifications.

[06/09/2021] For the tenth anniversary of the MS audio laboratory FHA 1.3 balanced headphone amplifier model, its updated version MS audio laboratory FHA 1.3SE (Art. FHA 1.3SE) has become available. The updated model has received a number of new interesting additions in addition to a completely updated circuit design. The updated FHA 1.3SE fully balanced amplifier easily delivers over 8 watts per channel. MS audio laboratory FHA 1.3SE uses the topology of independent amplification of DUAL MONO channels and implements the possibility of both balanced and unbalanced connection of headphones with and without inverting the signal phase due to the DUAL AMP topology. A filtering circuit for the DC component in the supply network voltage has been implemented to eliminate magnetization of the magnetic circuits of network transformers. The model is characterized by powerful and accurate presentation, comfortable sound with excellent stage, micro- and macrodynamics. This model is ideal for building the ultimate high-end audio system. The front panel of the MS audio laboratory FHA 1.3SE amplifier is made of carbon fiber coated with layers of polished varnish. The MS audio laboratory FHA 1.3SE amplifier has reliable XLR connectors. Detailed information about the fully balanced headphone amplifier MS audio laboratory FHA 1.3SE

located in the SOUND AMPLIFIATION section. The amplifier is already available for order.

[10/17/2020] In the past, we were often asked why we don’t have cables for Sennheiser HD800 and HD800S in our range. Now we offer the ultimate solution for these headphones. A replacement cable (cord) model for Sennheiser HD800/800S headphones (Art. HD800-Hybrid) is available for order. The cable is made of pure hybrid conductors placed in Teflon insulation. Each conductor, and there are four in total in the cable, has a cross-section of 0.35 mm2. The cable is equipped with reliable gold-plated connectors. It is possible to produce a balanced cable for connecting to an amplifier with a balanced output with Jack 6.3 (TRS), Jack 4.4, 2xXLR3 or XLR4 connectors. With this cable, the headphones will reach a new, previously unknown level of sound quality. You no longer have to choose and select something. Just take the best. Detailed information about the replacement cable for Sennheiser HD800/800S headphones is located in the CABLES section.

[09.09.2020] There are many models of interesting DACs that do not have the ability to connect to a computer. We are very aware of this problem. And it is especially difficult to solve the problem of connecting a DAC to a computer if you set yourself the goal of outputting “digital” quality. Our company offers its solution for sophisticated music lovers and those who like to listen to music in high quality. The digital USB-S/PDIF interface MS audio laboratory DDC 1.0 will save you from the difficulties of connecting a DAC to a computer. USB - S/PDIF interface MS audio laboratory DDC 1.0 supports the standard USB bus and is equipped with three digital signal output interfaces using standard transmission protocols: coaxial 75 Ohm S/PDIF, balanced digital 110 Ohm AES/EBU and optical TOSLink. All outputs support 24-bit resolution and a sampling frequency of 192 kHz. The device can be powered either from a 220 V network or from a USB bus. Front panel MS audio laboratory DDC 1.0

made of carbon.
Detailed information about the USB - S/PDIF converter MS audio laboratory DDC 1.0
is located in the SOUND AMPLIFIATION section.

[04/07/2020] Almost every owner of headphones with a replaceable cable is familiar with the task of selecting a new replacement cable. Now, in addition to standard models, we can make a replacement cable for almost any headphone model upon request. Regardless of the selected conductor material, the cable can be “dressed” in a soft “cotton” braid, equipped with a Jack 3.5 connector complete with a screw-on adapter to Jack 6.3 or a connector for a balanced connection XLR-4 or a pair of XLR-3, etc.

[10.29.2019] We are pleased to present a new product - Hi-End headphone amplifier MS audio laboratory FHA 1.8

(FHA Art. 1.8).
The new model of the powerful Hi-End amplifier FHA 1.8 easily provides more than 4 watts per channel, which makes it indispensable for working with isodynamic and dynamic headphones of the highest class. The model is characterized by powerful, accurate presentation, comfortable sound with a very wide stage and ideal transmission of macro and micro nuances. This model is ideal for taking your audio system to a new quality level. For better compatibility with headphones, MS audio laboratory FHA 1.8 provides a gain switch. The front panel of the amplifier is made of carbon fiber covered with layers of polished varnish. The MS audio laboratory FHA 1.8 amplifier has RCA connectors manufactured by CMC. It can be used as a pre-amplifier with volume control when used in conjunction with a power amplifier, monoblock power amplifiers or active speaker systems. Detailed information about the Hi-End headphone amplifier MS audio laboratory FHA 1.8
is in the SOUND AMPLIFIATION section. The amplifier is available for order.

[04/21/2019] Correctly supplied mains voltage to the audio system devices has a positive effect on its sound. For audio connoisseurs, we have created a model of the POWER-CU/RH network cable that meets the requirements of Hi-End audio. Rhodium connectors and large-section copper conductors ensure not only reliable contact of the detachable connection, but also the closest possible connection of the device to the power supply network. The cable is suitable for any audio devices and can withstand a current load of 16 A, and its affordable price will improve the sound of your audio system without compromising your budget. The cable can be ordered to the required length in a three- or two-conductor configuration. Detailed information about the network power cable is in the CABLES section.

[02/05/2019] New Year brings gifts and surprises. Since the beginning of 2019, the external Hi-End digital-to-analog converter DAC 1.0 USB has been available with a new USB module based on the modern XMOS U208 processor. The new module ensures even greater reliability of data transfer via the USB bus, which allows for an increase in sound quality. However, the price of the device has not changed. Detailed information about the MS audio laboratory DAC 1.0 USB

located in the SOUND REINFORCEMENT section.

[02/16/2018] Monoblock power amplifiers have recently become very popular. They are ideally combined with small floor-standing or bookshelf speaker systems and, due to their disaggregated layout, do not take up much space. Our company is pleased to present a new product for 2022 - a monoblock amplifier based on MOSFET model PM 2.0. The PM 2.0 monoblock amplifier is capable of delivering up to 75 W when working with a passive speaker system. It can be connected to the output of any preamp (or headphone amplifier as a preamp) using an RCA or XLR input. The circuit implementation of PM 2.0 is unique and has no analogues in the world. All PM 2.0 amplifier stages use only MOSFETs, which ensures excellent sound quality and high power output with extremely low distortion. Detailed information about the new monoblock power amplifier based on MOSFET in the SOUND AMPLIFIER section.

[01/21/2018] Network power cables must be of high quality. Few can argue with this statement. After a long search, we created a Hi-End model of a network cable that meets the requirements of high-quality audio. The POWER-CU/AU model uses pure copper conductors paired with gold-plated contact groups. The cable is suitable for any audio devices and can withstand a current load of 16 A, and its affordable price will improve the sound of your audio system without compromising your budget. The cable can be ordered to the desired length in a three- or two-conductor configuration. Detailed information about the network power cable is in the CABLES section.

[04.09.2017] The range of digital coaxial adapter cables and interconnect digital coaxial cables has been expanded. Now you can choose an adapter cable for connecting an external DAC to the digital output of a portable player or a digital cable for connecting a DAC to the output of a source with RCA connectors: Jack 3.5-RCA - pure copper; RCA-RCA-75 (diameter 6 mm) - pure copper; RCA-RCA-75(8) increased diameter up to 8 mm. - pure copper. Coaxial digital cables use highly purified copper conductors and low-loss dielectric materials at high frequencies. The screen made of braided copper wires does not contain foil, which allows the cable to retain its properties even after repeated bending. Detailed information about digital coaxial cable adapters and digital S/PDIF interconnect cables can be found in the CABLES section.

[09/03/2017] The range of replacement cables has been expanded with models for OPPO PM1, PM2, PM3 headphones and compatible headphone models with one or two Jack 3.5 connectors of increased length. Replacement cable models differ in the conductors used: OPPO-Cu - pure copper; OPPO-Cu/Ag - copper coated with silver; OPPO-Hybrid - hybrid conductors copper + silver. Each model has its own presentation character, which allows you to adjust the sound of the headphones to your taste. Regardless of the model, a replacement cable from our production can eliminate the shortcomings of the sound of OPPO headphones - “sluggishness” and “shapelessness” of presentation; At the same time, slightly adjust the tonal balance to your taste. Replacement cable models are available to order. All prices indicated on the website are current. Detailed information about replacement cables for OPPO PM1, PM2, PM3 headphones is in the CABLES section.

[08/18/2016] Model of external Hi-End digital-to-analog converter MS audio laboratory DAC 1.0 USB

(Art. DAC 1.0 USB).
External Hi-End 24 bit / 192 kHz digital-to-analog converter MS audio laboratory DAC 1.0 USB
is a modification of DAC 1.0 SE.
In the DAC 1.0 USB, all digital inputs are galvanically isolated. You can connect the DAC to the source via S/PDIF, USB or TOSLink. The built-in USB interface is built on an XMOS chip and is isolated from the DAC body for better isolation. The front panel of MS audio laboratory DAC 1.0 USB
is made of carbon.
Detailed information about the MS audio laboratory DAC 1.0 USB
is located in the SOUND AMPLIFIATION section.

[03/01/2016] Headphone amplifier MS audio laboratory FHA 1.7

(FHA Art. 1.7). The MS audio laboratory FHA 1.7 amplifier is characterized by extremely accurate, detailed presentation. This model is ideal for high-resolution audio. The amplifier uses a high-quality electronic active volume control with a wide range of adjustment, and the adjustment is controlled by a classic aluminum rotary knob. The MS audio laboratory FHA 1.7 amplifier is equipped with two outputs with different damping coefficients for connecting headphones. This makes it possible to adjust the sound of the headphones by simply switching to another jack. The MS audio laboratory FHA 1.7 amplifier can be used as a pre-amplifier or buffer with the ability to adjust the volume level. Detailed information about the amplifier is in the SOUND AMPLIFIER section. The amplifier is available both in a standard version and in the form of modifications made at the request of the customer.

[08/28/2015] The range of replacement cables has been expanded to include models for DENON AH-D7100 and AH-D600 headphones and compatible headphone models with two Jack 3.5 connectors. Replacement cable models differ in the conductors used: D7100-Cu - pure copper; D7100-Cu/Ag - copper coated with silver; D7100-Hybrid - copper+silver hybrid conductors. Each model has its own presentation character, which allows you to adjust the sound of the headphones to your taste. Regardless of the model, our replacement cable eliminates one of the main disadvantages of DENON headphones - the “booming”, “smeared” bass. Replacement cable models are available to order. All prices indicated on the website are current. Detailed information about replacement cables for DENON AH-D7100 and AH-D600 headphones can be found in the CABLES section.

[02.08.2015] The range of replacement headphone cables has been expanded with models for AKG headphones with a miniXLR 3-pin connector. Replacement cable models differ in the conductors used: AKG-Cu - pure copper; AKG-Cu/Ag - copper coated with silver; AKG-Hybrid - copper+silver hybrid conductors. Each model has its own presentation character, which allows you to adjust the sound of the headphones to your taste. Replacement cable models are available to order. All prices indicated on the website are current. Detailed information about replacement cables for AKG headphones can be found in the CABLES section.

[10/12/2014] The range of adapter cables has been expanded. Models of interconnect cables for connecting an amplifier with a balanced input to a signal source with an unbalanced output are available for order (Art. RCA-XLR-Hybrid, RCA-XLR-Cu/Ag, RCA-XLR-Cu). All cable models use high-quality modern materials and professional-quality connectors manufactured by Neutrik and Amphenol. Detailed information about interconnect adapter cables can be found in the CABLES section.

[06.08.2014] An improved model of the external Hi-End digital-to-analog converter MS audio laboratory DAC 1.0 SE

(Art. DAC 1.0 SE).
External Hi-End 24 bit / 192 kHz digital-to-analog converter MS audio laboratory DAC 1.0 SE
is an improved modification of DAC 1.0.
The DAC 1.0 SE has galvanically isolated digital inputs that allow you to connect the DAC to a digital signal source via S/PDIF, TOSLink or AES/EBU. The analog circuits and power circuits of the device blocks are optimized to obtain the highest possible sound quality. Detailed information about the MS audio laboratory DAC 1.0 SE
is located in the SOUND AMPLIFIATION section.

[06/27/2014] Semiconductor headphone amplifier MS audio laboratory FHA 1.6

(Art. FHA 1.6), made entirely of field-effect transistors. The amplifier uses a J-FET voltage amplification stage in a µ-follower circuit and a powerful push-pull MOSFET output stage. The amplifier has a soft “tube” sound and is capable of operating in class A with headphones with impedance from 4 to 600 Ohms. The MS audio laboratory FHA 1.6 amplifier is equipped with two outputs with different damping coefficients for connecting headphones. To adjust the volume, the amplifier is equipped with a high-quality ALPS RK27 regulator. Also, the MS audio laboratory FHA 1.6 amplifier can be used as a high-quality pre-amplifier or buffer with the ability to adjust the volume level. The amplifier is equipped with a protection system that reduces the audibility of transient processes when the device is turned on. Detailed information about the amplifier is in the SOUND AMPLIFIER section. The amplifier is available both in a standard version and in the form of modifications made at the request of the customer.

[06/23/2014] From now on, we are represented at the Forum of Russian Hi-End Manufacturers. You can participate in the discussion of MS audio laboratory products, ask questions to the developer, and suggest your ideas in the topics of the profile section of the forum. Forum address https://www.hiend-audio.pro.

[05/19/2014] The range of balanced interconnect cables has been expanded. Models of balanced interconnect cables are available for ordering for connecting an amplifier with a balanced input to a signal source with a balanced output (Art. XLR-XLR-Hybrid, XLR-XLR-Cu/Ag, XLR-XLR-Cu). All cable models use high-quality modern materials. The cables are equipped with professional quality connectors from Neutrik. Detailed information about balanced interconnect cables can be found in the CABLES section.

[05/18/2014] A forum on MS audio laboratory products has been opened - “Live Sound”

. On the forum you can leave a review about the product, the model you are interested in, share your listening impressions, and offer your ideas. Forum address https://forum.msaudiolab.com.

[11/17/2013] Headphone amplifier MS audio laboratory FHA 1.5

(Art. FHA 1.5). The MS audio laboratory FHA 1.5 amplifier is capable of playing the most complex vocal parts in classical works and recreating the “drive” of rock concerts. Works in class A with headphones with impedance from 4 to 600 ohms. The MS audio laboratory FHA 1.5 amplifier is equipped with two outputs with different damping coefficients for connecting headphones. This makes it possible to adjust the sound of the headphones by simply switching to another jack. You can connect a pair of headphones simultaneously to the MS audio laboratory FHA 1.5 amplifier for joint listening. Volume control in the amplifier is carried out using the original ALPS RK27. To protect the headphones during switching on and off and in case of emergency situations, the amplifier has a protection circuit that completely prevents damage to the headphones. A unique feature of MS audio laboratory FHA 1.5 is the presence of a DC voltage monitoring and neutralization circuit. Due to the use of this circuit, the amplifier is insensitive to direct voltage at the source output, and its circuit completely lacks coupling capacitors. In turn, the absence of coupling capacitors has a positive effect on the purity and reliability of sound reproduction, improves intelligibility and maintains the depth of reproduction of low-frequency components of the signal. The MS audio laboratory FHA 1.5 amplifier can be used as a pre-amplifier or buffer with the ability to adjust the volume level. Detailed information about the amplifier is in the SOUND AMPLIFIER section. The amplifier is available both in a standard version and in the form of modifications made at the request of the customer.

[09/30/2013] Digital USB 2.0 cables are available for order (Art. USB-Hybrid, USB-Cu/Ag, USB-Cu). The cables are made from pure materials, shielded and equipped with durable gold-plated USB connectors. The USB-Hybrid model uses hybrid copper and silver conductors, the USB-Cu/Ag model uses high-purity silver-plated copper conductors, and the USB-Cu model uses high-purity copper conductors. Any cable model can be ordered to the desired length. Detailed information about USB 2.0 cables can be found in the CABLES section.

[09/16/2013] Three models of replacement cables (cords) for Sennheiser HD-650 headphones are available for order (Art. HD650-Hybrid, HD650-Cu/Ag, HD650-Cu). The cables are made of pure materials and equipped with durable gold-plated connectors. The HD650-Hybrid uses hybrid copper/silver conductors, the HD650-Cu/Ag uses high-purity silver-plated copper conductors, and the HD650-Cu uses high-purity copper conductors. Any cable model can be ordered to the desired length. It is possible to manufacture a balanced cable for connection to an amplifier with a balanced output with Jack 6.3 (TRS), XLR-3 or XLR-4 connectors. Detailed information about replacement cables for Sennheiser HD-650 headphones is located in the CABLES section.

[05/30/2013] The range of interconnect cables has been expanded. Three models of interconnect adapter cables are available for order for connecting an amplifier with an unbalanced input (RCA connectors) to a signal source with a balanced output (XLR connectors). (Art. XLR-RCA-Hybrid, XLR-RCA-Cu/Ag, XLR-RCA-Cu). All models of adapter cables use high-quality modern materials. The cables are equipped with professional quality connectors from Neutrik and Amphenol. Detailed information about interconnect adapter cables can be found in the CABLES section.

[15.05.2013] Three models of replacement cables (cords) for HiFiman HE-4, HE-5, HE-6, HE-300, HE-400, HE500 headphones are available for order (Art. HE-Hybrid, HE-Cu/ Ag, HE-Cu). The cables are made of high-purity modern materials and equipped with reliable connectors made in Europe. The HE-Hybrid model uses hybrid copper/silver conductors, the HE-Cu/Ag model uses high-purity silver-plated copper conductors, and the HE-Cu model uses high-purity copper conductors. Any cable model can be ordered to the desired length. It is possible to manufacture a balanced cable for connection to an amplifier with a balanced output with Jack 6.3 (TRS), XLR-3 or XLR-4 connectors. Detailed information about replacement cables for HiFiman HE series headphones is located in the CABLES section.

[04/30/2013] Three models of interconnect cables (cords) with RCA connectors are available for order (Art. RCA-RCA-Hybrid, RCA-RCA-Cu/Ag, RCA-RCA-Cu). The cables are made from high quality materials. The RCA-RCA-Hybrid model uses hybrid copper and silver conductors, the RCA-RCA-Cu/Ag model uses high-purity silver-plated copper conductors, and the RCA-RCA-Cu model uses high-purity copper conductors. The models have characteristic features of presenting frequency components of musical material. Cables can be ordered in the required length. It is possible to produce adapter and balanced cables. Detailed information about RCA-RCA interconnect cables can be found in the CABLES section.

[04/15/2013] Three models of replacement cables (cords) for Audez'e LCD-2, LCD-3 headphones are available for order (Art. LCD-Hybrid, LCD-Cu/Ag, LCD-Cu). The cables are made from high quality materials. The LCD-Hybrid model uses hybrid copper and silver conductors, the LCD-Cu/Ag model uses high-purity silver-plated copper conductors, and the LCD-Cu model uses high-purity copper conductors. Cables can be ordered in the required length. If desired, it is possible to manufacture a cable for balanced connection to an amplifier with Jack 6.3 (TRS), XLR-3 or XLR-4 connectors. Detailed information about replacement cables for Audez'e LCD-2/3 headphones can be found in the CABLES section.

[02/04/2013] Semiconductor headphone amplifier MS audio laboratory FHA 1.4

(Art. FHA 1.4), made entirely of field-effect transistors. The amplifier uses a SRPP voltage amplification stage on a J-FET and a powerful push-pull output stage on a MOSFET. The amplifier has a neutral, deep, “uncolored” sound. Capable of working in class A with headphones having a resistance from 4 to 600 ohms. The MS audio laboratory FHA 1.4 amplifier is equipped with two outputs with different damping coefficients for connecting headphones. This makes it possible to adjust the sound of the headphones by simply switching to another jack. You can also connect a pair of headphones simultaneously to the MS audio laboratory FHA 1.4 amplifier for joint listening. To adjust the volume, the amplifier is equipped with a high-quality RK27 type regulator from the Japanese company ALPS. Also, the MS audio laboratory FHA 1.4 amplifier can be used as a high-quality pre-amplifier or buffer with the ability to adjust the volume level. Detailed information about the amplifier is in the SOUND AMPLIFIER section. The amplifier is available both in a standard version and in the form of modifications made at the request of the customer.

[06/03/2011] A fully balanced amplifier with a balanced headphone connection is available for order. The model is ideal for low sensitivity headphones, such as the HiFiman HE-6 and HE-4. MS audio laboratory FHA 1.3

made entirely of J-FET and MOSFET field-effect transistors in the signal path. Balanced amplifiers of the left and right channels are built on separate printed circuit boards and have separate power supplies (DUAL MONO topology). The rated power of the FHA 1.3 is 2x6W into a 50 Ohm load (HE-6). The amplifier has no analogues in the world. Details in the SOUND REINFORCEMENT section. Balanced headphone amplifier FHA 1.3 is available for order. It is possible to order balanced cords for connecting to a signal source and balanced connection of headphones.

What types of digital-to-analog converters are there?

Without the use of sound converters, the user will not be able to enjoy music recordings in digital format. The problem is that most of the built-in DACs that are found in almost all media-enabled electronic devices are not good enough in terms of playback. Simple DACs will add a high noise level, will not be able to read high-resolution files, etc. That is why the use of an additional device is an important upgrade to any high-quality audio system, regardless of its composition.

There are many types of audio converters from digital to analog format, depending on the shape and overall dimensions, functionality and number of inputs and outputs. First of all, there are:

• portable devices;
• desktop or stationary DACs.

Portable converters are connected directly to a computer or phone, are compact in size and have a relatively inexpensive price. They do not require separate power and, as a rule, are equipped only with a headphone jack and a line output for connection to an audio system.

A more functional and expensive option are desktop or stationary converters. They are much larger, require a separate connection to the power source, and also have a wide variety of inputs and outputs. Connecting to a digital device source can be done using Bluetooth or Wi-Fi. Such converters support many types of audio files and have a built-in volume control.

In addition, DACs are divided depending on the maximum bit depth, which characterizes the number of signal levels at the output. The higher it is, the better the sound reproduction quality. There are models with the following capacity:

• 16 bits;
• 24 bit;
• 32 bit;
• 64 bit.

Among the other parameters that can be used to classify a DAC, it is worth highlighting the number and type of inputs and outputs of the device, the maximum sampling frequency, the type of signal encoding (DSD or PCM), etc.