18. December 2021 · Comments Off on MSB M205 Mono Amplifier · Categories: Hifi News · Tags: , , , , , ,


After they launched the MSB S202 Stereo Amplifier, MSB Technology said that they had many requests for an improved mono amplifier in the same compact chassis.

The MSB M205 refines the S202’s performance with an upgraded input stage and a doubling of the power supply transformers and capacitors.

MSB M205 Mono Amplifier

The MSB M205 Mono Amplifiers


MSB Technology, of Silicon Valley, California, says that the MSB M205 perfectly complements their DACs’ “ultra high dynamic range, with optimized architecture in the critical areas of audio performance, power supplies, and ultra low-noise design”.

MSB M205 Mono Amplifier

The MSB M205 Mono Amplifier features fully modular cores, matched impedance input stages and a billet CNC cut chassis.

MSB M205 Mono Amplifier

Shots from the production process


200 Watt Rating

Trickle-down technology from the M500 Mono Amplifier

Zero Negative Feedback

Class A input stage

Class A/B output stage

Independent Input Stage and Output Stage power supplies

Shielded Transformers

Modular Core Design

Fully differential balanced design

Made in the U.S.A.

MSB M205 Mono Amplifier

Rear view of the MSB M205 Mono Amplifier


(per mono amplifier)

Static Power Consumption 90 Watts On

Standby power less than 2 watts

Operating Voltage Range   120/240V (Auto switching)

100V (Fixed)

Fuse   1/4″x1-1/4″ 10A 250V Slow Blow

Input   1x XLR Input

Output 2x Binding post set per channel

Controls: Input Impedance Switch, On/Off Button, Standby Button, Display Dimmer, 12V Mode Switch, 2x MSB 12V trigger port

Continuous Power Output (8Ω) < 1% distortion 220 W

Continuous Power Output (4Ω) < 1% distortion 400 W

Dual Bi-Amp Continuous Power Output (8Ω) < 1% distortion  200W

Dual Bi-Amp Continuous Power Output (4Ω) < 1% distortion  380W

Frequency Response (20 to 20kHz)       ±0.03dB

Signal to Noise (20 to 22kHz)       >130dB (>133dBA)

Equivalent Input Noise (22kHz BW)        0.65μV

Gain (150Ω source impedance)    23.8dB

Input Impedance (User Selectable)         75Ω / 300Ω / 1.2kΩ

Output Impedance (20 to 20kHz)  0.01Ω


Input/Gain Stage     – Class-A

– Double balanced

– Impedance matched

– Fully discrete

– Independent power

Output Stage – Class-AB

– Balanced

– Medium bias

– Current gain only

Chassis Dimensions (Per Mono Block)

Width: 16 in (404 mm)  Depth: 19 in (483 mm) Height: 6.5 in (165 mm) Without Feet 7 in (178 mm) With Feet

Weight: 90 lbs (41 kg)

Product Feet: M6X1 Thread 3 or 4 Foot Configuration

MSB M205 Mono Amplifier

Inside the MSB M205 Mono Amplifier


Suggested MSRP incl VAT for the M205 is 68,000€ including VAT / £58,000 GBP

MSB M205 Mono Amplifier

HiFi Pig Says: A high-end price tag indeed, but there looks to be a lot packed in to this latest offering from MSB.


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