C1.2 User Manual
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3.4.1 USB-IN
This optional board can be mounted in either of the two available option slots (Slots 1 and 2) and allows the C1.2
to accept high-resolution files from a USB source. For information regarding format, operating system and data
rate compatibility, please see the relevant section of the C1.2’s specifications (p36).
3.4.2 ANALOG-IN
Each ANALOG-IN board accepts and allows you to switch between two line-level analog inputs. Each board
is fitted with pair of balanced XLR sockets and one pair of single-ended RCA sockets. You can fit up to two
ANALOG-IN boards to your C1.2 (assuming that both the option slots are free), allowing you to connect two
balanced and two single-ended analog sources to your C1.2 Controller.
3.5 SYNC-I/O
The SYNC-I/O board allows for external clock synchronization, either with an external master clock (such as the
T1 Time Reference) or with a second unit with a clock synchronization capability. That might be the D1.5 player/
transport or another digital source component.
The SYNC-I/O board provides a BNC clock input that can be configured as 75 Ohm input impedance
(recommended with the CH Precision T1) or high input impedance through the C1.2’s menu. Supported input
frequencies on this connector are all standard audio Wordclocks (44.1, 48, 88.2, 96, 176.4 192, 352.8, 384, 705.6
and 768 kHz), audio Masterclocks (22.5792 and 24.576 MHz), DSD bitclock (2.8224 MHz) and atomic-clock
multiples (100 kHz and 10 MHz).
The SYNC-I/O board also provides a pair of 75 Ohm clock output connectors. Use these connectors to
synchronize an external device to your C1.2. The use of high-quality, genuine 75
Ω
BNC cables will also help
maximize performance.
3.6 ANALOG OUTPUT
Your C1.2 is fitted with independent left and right channel DACs, each with its own set of analog outputs. Each
channel offers a balanced XLR socket, a single-ended RCA and a 50
Ω
output on BNC.
3.7 Power cord receptacle and voltage selection
Make sure that the voltage selection is set to the correct value with respect to the AC voltage in your location
and that the power switch is in the Off position (0 side of the switch depressed). Connect the IEC plug to the
power cord receptacle and plug the power plug into the AC wall outlet or distribution block.
3.8 External power supply connector
The external power supply connector allows you to connect the X1 optional external power supply. When the X1
is used, it completely replaces the C1.2’s internal power supply, resulting in minimized noise and enhanced audio
quality. Note that only the (small) standby transformer of the C1.2 remains active in this case to ensure the C1.2’s
wake up functionality. The C1.2 therefore still requires a power cord.
