CH Precision

I1 Universal

Integrated Amplifier

The CH Precision I1 is a state-of-the-art universal integrated amplifier that brings together unparalleled musical precision, flexibility, and power in a single, elegantly engineered chassis. Designed for audiophiles seeking the ultimate in sound quality, the I1 combines CH Precision’s advanced AAVA volume control, high-performance current-feedback amplification, and fully balanced signal path to deliver an exceptionally transparent, dynamic, and lifelike listening experience. With a wide range of digital and analog inputs—including CH-Link HD, USB, Ethernet streaming, and optional expansion boards—the I1 seamlessly integrates into any modern high-end audio system, supporting PCM up to 24bit/384kHz and DSD256, native or DoP. Its sophisticated clocking, multi-bit delta-sigma conversion, and proprietary CH-PEtER processing ensure exquisite timing, resolution, and tonal fidelity across all frequencies. Complemented by versatile connectivity for bi-amping, headphone output, and optional expansion, the I1 offers a combination of technical mastery, sonic purity, and operational flexibility that sets a new benchmark in integrated amplifier performance. Encased in a meticulously crafted chassis, the I1 is both a statement of engineering excellence and a centerpiece for any high-end audio system.

Specifications

Standard Inputs

• Factory fitted with CH-Link HD, AES/EBU, S/PDIF, and TosLink digital inputs
• CH-Link HD interface allows synchronized transfer of high-definition audio content (up to 32bit/768kHz) and DSD, ideal for connection to the D1.5 CD/SACD Transport or other CH-Link HD units
• Standard digital inputs accept PCM up to 24bit/192kHz, DSD 1bit/2.822MHz (DSD64 DoP encoded)
• Ethernet Control Board (replaced by network streaming board if ordered or retrofitted)

Optional Digital Inputs

• Two digital input boards can be installed, allowing multiple digital sources
• Second board can be either another standard Digital Input Board or the USB Input Board
• Ethernet audio streaming input board (UPnP/DLNA compatible) connects to audio servers (NAS), streaming services, or internet radio
• PCM up to 24bit/384kHz
• DSD 1bit/2.8224MHz (DSD64), 5.6448MHz (DSD128), or 11.2896MHz (DSD256)
• Native DSD and DoP support
• PCM formats supported: WAV, AIFF, FLAC, ALAC, AAC, MP3
• DSD formats supported: DSF, DFF
• Asynchronous USB audio input board – PCM up to 24bit/384kHz, DSD 1bit/5.6448MHz (DSD128 DoP encoded)

Digital-to-Analog Conversion

• Individual Multi-bit Delta-Sigma converters for each channel
• Fully complementary, dual mono symmetrical circuit topology
• Discrete, dedicated shunt-topology regulated linear power supplies for low noise and maximum channel separation

Processing and Clocking

• Proprietary CH-PEtER 32-bit fixed-point spline filter with synchronous data oversampling processing
• Resolution enhancement for audio material recorded at less than 24 bits
• Full MQA decoding (unfolding and rendering) at 24bit/352.8–384kHz on all inputs
• Two ultra-low jitter VCXO oscillators, one per time domain
• Optional master/slave Clock-Sync board for synchronization with external clocks or D1 CD/SACD transport
• Clock-Sync board also allows use of T1 10MHz Time Reference clock