Introduction; Digital Input Options; Analog And Clock Input Options - CH C1.2 User Manual

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1 Introduction

CH products are designed and manufactured in Switzerland by CH Precision Sàrl. We use sophisticated digital

processing combined with fully discrete, fully balanced, fully complementary, ultra-short signal path analog

circuitry and extensive software monitoring and control to ensure the highest possible levels of performance,

operational consistency and versatility.

As a result, your C1.2 offers versatility and a number of operational features that are unique and probably

unfamiliar. For that reason it is essential that you fully understand every aspect of the C1.2's operation and

options if you are to enjoy its maximum possible performance.

As a 'card-cage' design, users can specify what inputs they require when ordering the C1.2, and can add

additional digital or analog inputs at a later date as required. Please also note that the C1.2 can be used as

a single chassis unit, a true monaural three-chassis unit and it can be combined with additional X1 power

supplies, the T1 Time Reference 10MHz clock and the D1.5 player/transport, allowing users to upgrade or expand

performance to suit their needs and musical ambitions. The basic instruction for handling and placing units is

identical in all cases. Configuring multi-box systems will be covered in the appropriate section of this manual.

DIGITAL-IN HD – provides CH Link HD, AES/EBU, S/PDIF (RCA) and TosLink optical input options.

ETHERNET-IN HD – provides an Ethernet connection for replaying high-resolution streamed sources. The

Streaming input accepts services such as Tidal or Qobuz, or locally stored files (PCM audio up to 768kHz/32bit

- twice the DXD rate, and DSD up to 22.5792MHz - also called DSD512), as well as connecting the C1.2 to the

dedicated audio/control network for remote control of all functionality via the CH Control Android App.

To play music from a roon server, select the Roon Ready input. To play music from a UPnP server, Qobuz or

Tidal, select the STREAMING input.

There is also a USB socket on the ETHERNET-IN HD input board. This is NOT a USB audio input connection

and is dedicated to the C1.2's firmware update procedure.

USB-IN – allows connection of USB audio sources, with PCM data rates up to 24bit/384kHz (DXD) and DoP-

encoded DSD up to DSD128 (1bit/5.6448MHz).

1.2 Analog input and Clocking options

ANALOG-IN – each ANALOG-IN board (up to two can be fitted to the C1.2) provides one pair of balanced XLR

and one pair of RCA inputs for line-level analog sources.

SYNC-IO – provides one input and a pair of outputs (on BNC connectors) for use with an external master clock

(such as the T1 Time Reference) or to synchronize the internal clock in the C1.2 with a second, external unit,

such as the D1.5 player/transport.

C1.2 User Manual

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