CH PRECISION M1.1 Specifications
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 |
| Output power | 2x 200W / 8Ω, 2x 350W / 4Ω, 2x 600W / 2Ω in stereo and bi-amp modes 1x 350W / 4Ω, 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 customized 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 120’000uF/100V ultra-low ESR/ESL capacitors |
| Regulators | Non-regulated symmetrical power supply for the power stages Eight local regulation stages for input/driver stages Seven local regulation stages for the logic/display |
General
| Display | 480×272 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:
CH PRECISION M1.1 Mono Amplifier Review by Michael Fremer ” STEREOPHILE “ Magazine, July 2019
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
CH Precision L1 and M1 Preamp and Power Amp review by Miles Astor ” Part-Time Audiophile ” Online Magazine, September 2017
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/
