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CH Precision M1 Power Amplifier

Quick Overview

CH Precision M1 Flagship Power Amplifier (available in Mono or Stereo version)

Being able to truthfully and accurately reproduce today’s highest quality recordings has never been more challenging. Only when each element of the reproduction chain is able to precisely recreate the music’s time and level information can a genuine emotion be felt. The M1, CH Precision 1 Series’ most powerful amplifier was developed with this in mind. The leading-edge technological advancements implemented on the A1 were further refined, among others is the ExactBias circuitry and a finer loudspeaker matching. Specified at 200W RMS into 8Ω in monaural mode, 2x 200W RMS into 8Ω in bi-amplification / Stereo modes and 700W RMS into 8Ω in bridge mode, the M1 houses a dedicated 2200VA power transformer providing the amplifier output stage with ample energy to accurately and effortlessly drive the most demanding loudspeakers.

Manufacturer's website CH Precision

Details

 Analog inputs

Inputs type Balanced (XLR), one connector per board
Single-Ended (RCA & BNC), one connector per board
Input impedance Balanced: 94kΩ
Single-Ended: 47kΩ or 300Ω
Input stage JFET input stage
Ultra-low noise, discrete fully differential stage
24dB range adjustable gain in 0.5dB steps

 Amplification

Amplification stage Ultra-low noise full discrete class AB design
6 pairs of complementary output transistors
Ouptut power 2x 200W / 8Ω, 2x 350W / 4Ω, 2x 600W / 2Ω in stereo and bi-amp modes
1x 350W / 8Ω, 1x 600W / 2Ω, 1x 1100W / 1Ω in monaural mode
1x 700W / 8Ω, 1x 1200W / 4Ω, 1x 1600W / 2Ω in bridge mode
Bias Patent-pending bias circuitry for constant bias operation
Feedback User-adjustable local vs. global feedback ratio, from 0% to 100% in 10% steps 
Bandwidth DC to 450kHz (-3dB) at 1W into an 8Ω resistive load
Signal to Noise Ratio Better than 115dB in stereo and bi-amp modes
Better than 118dB in bridge mode
Total Harmonic Distortion + Noise Less than 0.1% with 0% global feedback
Less than 0.01% with 100% global feedback

 Analog outputs

Binding posts Two pairs of Argento binding posts for loudspeakers connection
Monitoring Non-intrusive DSP-based protection of the amplifier and connected loudspeakers
Instantaneous voltage & current values are permanently monitored on each channel
Protections Short-circuit protected
Disconnected loudspeaker detected
Over-temperature of the heatsink
Over-temperature of the output transistors
Power supply
Transformer 2'200VA toroidal transformer for output stages, oversized for low-noise operation
100VA separate toroidal transformer for input stages 
Power capacitors  2x 100'000uF/100V 4-poles capacitors 
Regulators Non-regulated symetrical power supply for the power stages
Eight local regulation stages for input/driver stages
Seven local regulation stages for the logic/display
General
Display 480x272 pixels, 24bits color, AMOLED
Mains operation Selectable 100V, 115, 230V AC, 47-63Hz
Fuses value and location Standby fuse (white holder): 250mA T (230V AC), 500mA T (100V AC, 115V AC)
Audio (mid power) fuse (black holder): 1.6A T (230V AC), 3.15A T (100V AC, 115V AC)
Power fuse (IEC20 holder): 16A T (230V AC), 32A T (100V AC, 115V AC)
Power supply consumption <1W (standby), 2200W max in operation
Dimensions/Weight 440 x 440 x 266mm (W x D x H), 75kg
Remote control Ethernet based system control via the Android CH Control App

Please find reviews below:

Image result for the audio beat logo

CH Precision P1, L1 and M1 Review by Roy Gregory in " The Audio Beat " Magazine, May 2018  

http://www.theaudiobeat.com/equipment/ch_precision_l1_p1_m1.htm


CH PRECISION & WILSON BENESCH System review by " HiFi Plus " Magazine Issue 159 , May 2018

Complete review HERE


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CH Precision L1 and M1 Preamp and Power Amp review by Miles Astor " Part-Time Audiophile " Online Magazine, September 2017

https://parttimeaudiophile.com/2017/09/03/review-ch-precision-l1-dual-monaural-line-preamplifier-and-m1-reference-power-amplifier/


Image result for positive feedback audio

CH Precision M1 Mono Amplifiers reviewed by " Positive Feedback " Online Magazine, January 14th, 2016

http://positive-feedback.com/reviews/hardware-reviews/ch-precision-m1-mono-amplifier/