• 12840
  • DE 29323089


Based on our core principles “Handmade” and “Made in Germany”, we have designed the BRAX MX4 amplifier with the very latest in technical innovation. The result: A top-class amplifier and a truly high-end statement. After a long period of research and development to bring innovative technologies and an extremely fastidious manufacturing process together, it is then combined with our love for music as the driving force, the BRAX MX4 is without a doubt the most powerful and quite simply put - The Best Sounding 4-channel amplifier this side of Mars!

Regarding the clean cut design of the MX4 amplifier and the sophisticated layout of the circuit board, we have deliberately set crossovers and filter functions aside. Short signal paths combined with selected components “Made in Germany” ensure a pristine listening experience and underline the purists’ high-end philosophy that the BRAX MX4 was built to meet.

In order to completely eliminate power differences and the need for manufacturing tolerances, we only use hand-selected transistors for the production of each MX4 amplifier. Aside from power, voltage and resistance tests, we check them against more than 300 categories to ensure that every transistor will be in perfect technical harmony. In doing so, BRAX amplifiers have obtained a worldwide status for producing the finest reference amplifies money can buy. Striving for ultimate perfection, Audiotec Fischer is the only manufacturer of audiophile products on the globe that conducts this extensive and time-consuming hand-selection process for its components. Of course, all the instruments that we need for testing are developed in-house, it’s that important to us!

With two separate power supplies, each dedicated to its own set of channels, A/B and C/D, the only result is an endless supply of stable output power. The amplifier’s output is even stable when you connect loudspeakers and a woofer with different impedances to the BRAX MX4. In order to control voltage fluctuations, an external power stabilizer can be directly connected to the power supply. In addition, the solid terminals that are gold-plated will accommodate cables up to 50mm²!  This is just another reason that you can trust in the BRAX MX4 to never let you down.

At the end of the day, the BRAX MX4 can be described as an amplifier with a sound rendition that is truly dynamic, powerful in an awesome way and as swift as an Indian arrow. The underlying philosophy is rounded-off during the packaging process where it is sealed in a precious wooden box. Furthermore, each single amplifier is manufactured individually and its respective serial number is recorded in our data-base. The BRAX MX4 amplifier is only produced as needed, and as a result, we can respond to our customer’s requirements during its production. In this way, each amplifier is a valuable one of a kind, that rightly deserves the titles “Handmade” & “Made in Germany”.


  • Optical digital inputs used for the upcoming BRAX DSP (2 x Toslink)
  • Separate terminal for connecting a BRAX Power Stabilizer directly to the switching transistors
  • Eight capacitors (with a total capacity of 40,000 microFarad) take care of an extremly high current impulse load
  • 200 Ampere high-performance switching transistors
  • Interference-free power supply due to optimized suppression coil up to 300 Ampere with ultra-low internal resistance
  • Especially developed transformers with highly-efficient core materials guarantee a total performance of more than 1,800 Watts
  • High efficiency due to super-fast Schottky power diodes with more than 160 Ampere in total
  • Below the lateral PC-boards there are in total 32 hand-selected high-end MOSFET transistors which account for brilliant sound
  • Processor controlled operating data management of the amplifier and power supply. It also controls the optional fan. Furthermore the processor is supervising the whole amplifier and shuts it down in case of malfunctions
  • Engraved serial number on the stainless steel plate
  • Impedance independed output power of around 280 Watts per channel
  • 4-, 2- and 1-Ohms stable
  • Optional fan at the bottom plate with porcessor supported fan control
  • The solid heatsink, made of a special aluminium alloy takes care of a perfect cooling of power supply transistors and those of the amplifier

Technical data

Output power RMS  
- @ 4 Ohms 4 x 275 Watts
- @ 2 Ohms 4 x 280 Watts
- @ 1 Ohm 4 x 285 Watts
- bridged @ 4 Ohms 2 x 550 Watts
- bridged @ 2 Ohms 2 x 560 Watts
Amplifier technology Class AB
Inputs 4 x Cinch
2 x Optical SPDIF (12 - 96 kHz)
1 x Remote In
Input sensitivity RCA / Cinch 1.0 - 8.0 Volts
Input impedance RCA / Cinch 10 kOhms
Input impedance highlevel
Outputs 4 x Speaker output
Output voltage RCA / Cinch
Signal converter for digital input BurrBrown 24 Bit DA converter
Frequency response 10 Hz - 80 kHz
Bass boost
Slope high- / lowpass
Slope subsonic / lowpass
Signal-to-noise ratio digital input > 110 dB (A-weighted)
Signal-to-noise ratio analog input > 110 dB (A-weighted)
Distortion (THD) < 0.001 %
Damping factor > 1000
Operating voltage 9 - 16 Volts
Idle current 8.5 A
Fuse 6 x 25 A LP-Mini-fuse (APS)
Additional features Colour Protection System, BRAX Power Stabilizer connector, Start-Stop capability
Dimensions (H x W x D) 79 x 360 x 360 mm /
3.11 x 14.17 x 14.17"
Net weight 11.5 kg

Scope of delivery

1 x High-End Amplifier BRAX MATRIX MX4
1 x BRAX MATRIX T-shirt
3 x Allen key
1 x Certificate
1 x Hand-signed instruction manual
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