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MSB M205 Mono Amplifier

MSB M205 Mono Amplifier

Thanks to two massive custom low-noise high-current toroidal transformers and rugged high-current output buffers, the M205’s provide a transparent, holographic listening experience that’s completely fatigue free.

This ensures that the amplifiers present consistent performance even with difficult speakers.

Indication price per pair

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Impressive Performance. Compact Mono Design.

Innovation. Redoubled

After the resounding success of the S202 Stereo Amplifier, there were many requests for an improved mono amplifier in the same compact chassis. The M205 refines the S202’s already incredible performance with an upgraded input stage and a doubling of the power supply transformers and capacitors. The result is a spectacular increase in sound quality with increased sound-stage definition, vocal realism, and instrument solidity available from the very first notes. The M205 perfectly complements MSB’s DAC’s ultra high dynamic range with optimized architecture in the critical areas of audio performance, power supplies, and ultra low-noise design. The fully modular cores, matched impedance input stages and billet CNC chassis’ result in the highest value mono amplifiers MSB has ever created.

Input Architecture

The M205 features a discrete design with a Class-A matched impedance input stage. The result is a product with minimized signal reflections, input noise, and distortion, while also maximizing power transfer and dynamic range in a zero negative feedback design. All components were meticulously chosen for their sonic performance and longevity, ensuring your amplifier is built to last.

Billet CNC Chassis

The M205 amplifiers are designed and lovingly crafted in their factory based in California. After 28 hours of CNC machining, two complete chassis’ of billet aluminium components are ready, maximizing heatsink area with a stunning visual profile. This high-efficiency design provides a surface area of over 3,000 in2 per amplifier. High-power heat pipes distribute heat evenly for optimal thermal and electrical performance.

Core Values

Building the M205 amplifiers with core enclosures greatly improves their reliability and performance. Upon completion, the cores are rigorously tested and stocked for orders, ensuring the highest quality product is ready at a moment’s notice. With this segmentation, your system is optimized for performance and resilience.

Smart Control Features

The M205’s are equipped with simple, user-friendly control interfaces. Intuitive push buttons, remote commands, and the 12V triggers guarantee control over power and standby modes. Further control of amplifiers “power on” timers and soft-start circuits allow a multi-amplifier system to power up without putting strain on your listening room’s electrical system.

Powerful Configurations

Intuitively oriented speaker lugs direct your speaker cables in the right direction without strain. With dual outputs, the M205 is ideal for a bi-amped system. Multiple ground posts enable EMI reduction strategies, including shielded cables and system star grounds.

Anodized Finishes.

Elegant yet commanding, MSB’s finishes are available in a matte silver or matte black anodize. MSB’s products include their in-house designed viton feet, but any audiophile M6X1 foot can be installed to personalize your system.

The 12V Trigger Adapter

The 12V trigger adapter provides a multitude of ways for connecting your MSB product with other 12V trigger systems.

 

SPECIFICATIONS

(Per 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
2 x Binding post set per channel
Controls
Input Impedance Switch
 
On/Off Button
 
Standby Button
 
Display Dimmer
 
12V Mode Switch
 
2 x 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
200 W
Dual Bi-Amp Continuous Power Output (4Ω) < 1% distortion
380 W
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
Topology – Input / Gain Stage
- Class-A
 
- Double Balanced
 
- Impedance Matched
 
- Fully Discrete
 
- Independent Power & Transformer
Output Stage
- Class-AB
 
- Balanced
 
- Medium Bias
 
- Current Gain only
Chassis Dimensions – Per Mono Block
40.4 x 48.3 x16.5 cm (WxDxH) (without feet)
 
40.4 x 48.3 x 17.8 cm  (WxDxH (with feet)
Weight
41 Kg
Product Feet
M6X1 Thread / 3 or 4 Foot Configuration
Accessories
User Manual
 
IEC Power Cord