CH Precision will be present in a dealer’s room at this year’s Swiss High-End and will be showcasing their new I1 integrated amplifier, details of which can be found below.

CH Precision’s recipe for making a Universal Integrated Amplifier: Gather together an A1, C1, L1 and P1. Gently squeeze and collect the essence and soul of each product. Delicately pour the concoction into a mould in the shape of the CH unique enclosure. Lightly shake for perfect consistency. Season to taste with optional audio input cards. Serve with your favorite source and loudspeakers. Sit down and enjoy! With digital, analog, phono, USB and Ethernet streaming inputs to choose from, the I1 is the heart of your compact yet exclusive audio system. While specified at 2x 100W RMS into 8Ω, its internal 1000VA power transformer provides the amplifier output stages with ample energy to accurately and effortlessly drive any loudspeakers.

Input Modularity

• Factory fitted with AES/EBU, S/PDIF, Toslink and CH Link digital inputs

• Ethernet audio streaming input, optional

• USB audio class 1.0 and 2.0 streaming input, optional

• Analog balanced XLR and single-ended RCA inputs, optional

• Current-mode phono input, ideal for MC cartridges, RIAA, eRIAA, Emi, Columbia, Decca and Teldec EQ curves, optional

Processing & Clocking

• Proprietary CH-HiD synchronous data oversampling

• Resolution enhancement for audio material of less than 24bits

• Ultra low jitter digitally controlled VCXO oscillators on dedicated power supplies

• Phono input adjustable gain

• Post volume control, line-level analog output on balanced XLR connectors

• Tight tolerance high-grade metal film resistors

Amplification Stages

• Pure class A ultra low noise driver and class AB pure follower power stage

• Feedback Ratio adjustable from 0% – local feedback only – to 100% – global feedback only – in 20% steps

• Patent-pending ExactBias circuitry

• Power transistors and heat sink temperature monitored

• No output relay

• Argento loudspeaker binding posts

Power Supply

• Shielded 1000VA power transformer

• Hyper fast soft recovery diode bridge rectifiers

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

Unit Specifications

Digital Audio Inputs

AES/EBU, S/PDIF, Toslink PCM up to 192kHz/24bits and DoP (DSD64 over PCM)

CH Link PCM up to 768kHz/32bits and native DSD up to 5.6448MHz/1bit

Audio Streaming (optional)

Ethernet Connects to a UPnP/DNLA compatible server (eg NAS). Browse music from a tablet using the CH Control App

USB Enables bit-exact, ultra low jitter playback of high resolution audio files directly from a computer

Phono MC Input (optional)

Input Impedance <100mΩ, virtual ground input

Analog Audio Inputs (optional)

Input impedance Balanced (XLR): 94kΩ or 600Ω – Single-ended (RCA and BNC): 47kΩ or 300Ω

Maximum input level Balanced (XLR): 8V RMS – Single-ended (RCA and BNC): 4V RMS

Analog Audio Outputs

Line level outputs Balanced (XLR): 4V RMS – Volume Controlled variable output

Power outputs 2x 100W RMS/8Ω, 2x 175W RMS/4Ω

General

Display 480 x 272 pixels 24bits RGB AMOLED

Power supply Selectable 100V, 115V or 230V AC, 47Hz to 63Hz, < 1W in Standby

Overall dimensions and weight 440mm x 440mm x 133mm, 43kg

Control / Software update Ethernet based system control via the Android CH Control App / USB port for software update