CH Precision M1 Amplifier and L1 Preamplifier


CH Precision

CH Precision has just announced two new products – their 1 Series M1 monaural amplifier and their L1 monaural analog line level preamplifier.

M1 Monaural Amplifier:

The M1 is the company’s first mono block and is their most powerful amplifier to date.  Leveraging the leading-edge technological advancements of CH Precision’s own A1 2-channel amplifier, the M1 takes performance to a higher level.  The M1 incorporates CH Precision’s ExactBias circuitry for greater loudspeaker matching.  Power output is 200 watts (RMS) into 8Ω in monaural mode or 2x 200 watts (RMS) into 8Ω in bi-amplification mode.  The M1 also has the ability to deliver 700 watts (RMS) into 8Ω when running in bridge mode.  At the heart of the M1 is an very high powered 2200VA power transformer that ensures the amplifier output stage always has ample energy to accurately and effortlessly drive connected loudspeakers.

Key Features:

•Multiple running modes: Monaural mode / bi-amplification mode / bridge mode

•2200VA power transformer mounted on silentblocks

•Magnetically and electrostatically shielded transformers

•Hyper fast soft recovery diode bridge rectifier

•4-pole 100’000uF reservoir and filtering capacitors

•Dedicated 20A mains socket for audio power section

•Class AB, fully symmetrical design

•Fully discrete, ultra low noise, high slew rate design

•No capacitor in the audio signal path

•No output relay

•Argento loudspeaker binding posts and internal wiring

•Trim gain: – 24dB range in 0.5dB steps

•Ranging from 0% – local feedback only – to 100% – global feedback only – in 10% steps

•Feedback can be set on the fly from the user interface

•Independent feedback ratio in bi-amplification mode

•Amplifier output stage and listening room temperature independent bias

•Patent-pending ExactBias regulation circuitry

•Non-invasive output stage voltage, current and temperature monitoring

•Protection procedures in case of output short circuit, open connection or excessive temperature

•Instantaneous output power and temperature can be displayed on the front panel


L1 Dual Monaural Preamplifer:

The L1 is CH Precision’s all-new dual monaural analog line level preamplifier.  The L1 has been developed to with a focus on transparency, maintaining the original audio characteristics and signal dynamics.  To achieve this, the L1 is a pure class A, ultra low noise, high bandwidth, fully balanced transistor based design.  The shortest path between input and output has been sought to maintain the highest speed, transparency and musicality.

Key Features:

•20bits R-2R ladder network volume controls with 118dB range in 0.5dB steps

•Tight tolerance high-grade metal film resistors

•Fast switching, low On resistance analog switches

•Phase inversion and Mono modes

•Pure class A, fully symmetrical design

•Fully discrete transistor based circuitry

•Ultra low noise, high bandwidth, high slew rate design

•Dedicated discrete regulated linear power supplies

•Ultra low noise, high accuracy regulation

•Oversized mains transformer

•Shunt regulators for critical stages

•Over-current protection

•Can be powered from the X1 External Power Supply

•Four Neutrik balanced XLR connectors per channel

•Two WBT single-ended RCA connectors per channel

•Two high bandwidth coaxial BNC connectors per channel

•Two individually buffered Neutrik balanced XLR connectors per channel

•Two individually buffered WBT single-ended RCA connectors per channel

•Two individually buffered high bandwidth single-ended BNC connectors per channel

The new CH Precision M1 Monaural Amplifier is priced at: $94,750 U.S. while the new L1 Preamplifier has a price of: $32,975 U.S.   An optional X1 Power Supply for L1 is priced at: $14,950 U.S.  Look for more details at: