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CH C1.2 User Manual

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C1.2 Digital to Analog Controller
User Manual

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Summary of Contents for CH C1.2

  • Page 1 C1.2 Digital to Analog Controller User Manual...
  • Page 2 Controller. Our team has put all of our efforts into designing and manufacturing this top quality versatile and future-proof product and is proud to present it to you. We hope your C1.2 will bring you uncountable hours of emotion from your musical collection.

  • Page 3: Table Of Contents

    7.1 General clocking considerations 7.2 Without SYNC-I/O board 7.3 C1.2 DAC/Controller (with SYNC-I/O board) + D1.5 or D1 CD/SACD transport (with SYNC-I/O board) 7.4 C1.2 with D1.5/D1 (both with SYNC-I/O board) and T1 Time Reference (or other 10MHz external master clock) 7.5 C1.2 DAC/Controller + Computer (USB audio input)

  • Page 4: Introduction

    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.

  • Page 5: Global Audio Options

    Firmware version and update 1.6 Chassis configurations/extension The C1.2 DAC Controller is fully compatible with both the X1 external power supply and the T1 Time reference external clock, further upgrading musical performance. As well as being highly configurable in terms of inputs and operation, the C1.2 can also be expanded into a multi-box True Monaural DAC Controller.

  • Page 6: Setting Up Your C1.2

    Please also ensure that the rack or support space on which the C1.2 will be placed has been cleared and cleaned before you start. At this point it is also worth ensuring that the connectors on any interconnect cables are cleaned and that the power to your system is turned off.

  • Page 7: Package Contents

    Decide whether you will use the CH Precision supplied leveling/grounding spikes. If you do plan to use the CH spikes, use the blue suction cup to remove the four circular covers in the top plate of each unit. Gently insert the hardened aluminum composite spikes into each exposed shaft and use the short red screwdriver to turn them enough to engage the threads at the bottom of each spike.
  • Page 8 This should ensure that the load is evenly applied on all four spikes. It is worth using a spirit level to ensure that the C1.2 is perfectly level. If it is not, adjust the spikes with the screwdriver.

  • Page 9: Stacking The C1.2

    Stacking the C1.2 cosmetic caps C1.2 DAC/ Controller stacking caps X1 external power supply unit or other CH unit support discs C1.2 User Manual...

  • Page 10: Connections

    3 Connections You are now ready to connect your C1.2 to your system. Given the differences between systems and the modular nature of the C1.2, with its range of input options, your range of source components and system configuration will almost certainly differ from the example below. However, we have selected a ‘fully-loaded’...

  • Page 11: Ethernet-In Hd

    This board connects the C1.2 to the dedicated audio network and allows you to stream music and/or locally stored files as well as access the CH Control app, which allows you to adjust or set any system parameter from a compatible Android tablet.

  • Page 12: Usb-In

    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).

  • Page 13: A Word About Cables

    Our CH-LINK HD is carefully engineered to maximize performance when it comes to digital data transfer. If you are using the AES/EBU, S/PDIF or TosLink inputs to your C1.2, connecting it via Ethernet or USB cabling, or using clock cables between units, then we strongly advise that you experiment or consult with your dealer over your choice of cables.

  • Page 14: Operation

    4 Operation The C1.2 DAC/Controller can be operated from the front panel, from the IR remote control or from CH Control Android app. Feedback to the user is provided by a high-definition display with customizable colors. Setup operations are handled from the front panel or the CH Control Android app.

  • Page 15: User Control Knob

    1. External ring rotate Left [<<E] Normal Push [NP] and Long Push [LP] 2. Central knob rotate Left [<<C] 4. External ring rotate Right [E>>] 3. Central knob push. There are two types of push: 5. Central knob rotate Right [C>>] C1.2 User Manual...

  • Page 16: Operating Modes

    (selection, switching and setting level) whereas Menu mode is used to configure the unit. The C1.2 also includes Shortcuts for quick access to selected Menu mode items. Shortcuts are user programmable and most Menu mode items can be selected as Shortcuts.

  • Page 17: Shortcuts

    PCM audio coming from its first AES-EBU input at the rate of 44.1 kHz. The output level is -18.5 dB, but is currently muted. The C1.2 has locked its 22.5792 MHz (512 x 44.1 kHz) DCXO to the incoming audio stream. The polarity of the audio signal is inverted, and the C1.2 is powered by an X1 external DC power supply.
  • Page 18 6. Arrow indicating External Rotate Left [<<E] if 3. Next Parameter Value if External Rotate Right applies. The item below indicates the next parameter [E>>] is applied (parameter up) value (down direction)Bridge) 4. Current Parameter Value (for other Shortcuts the C1.2 User Manual...
  • Page 19 Central Rotate Right [C>>]) 2. Current value of the parameter. Default action is to 4. Next parameter value. If External Rotate Right exit (go back to Normal mode) [E>>] is applied, the unit enters into Menu mode C1.2 User Manual...

  • Page 20: Menu Mode

    4.2.3 Menu mode The Menu mode allows for Configuration and Setup of the C1.2 DAC/Controller through a set of menus. Menu mode is entered from the last Shortcut item (see above). From Normal mode, enter the Shortcut mode by applying a Normal Push [NP]. By successive Normal Pushes [NP], step to the last Shortcut item (DETAILED SETUP) and apply an External Rotate Right [E>>] to enter the Menu mode.
  • Page 21 Once a terminal Parameter (e.g. a Parameter not giving access to a further sub-menu) is selected by External Rotate Right [E>>], the C1.2 displays the corresponding Parameter adjustment screen. The following example shows the AUDIO >> PHASE POLARITY Parameter adjustment screen. Other Parameters are similar but may show more (or less) choices for the Parameter value.

  • Page 22: Configuration

    Please note that the bypass setting should only be used in conjunction with an external processor or other, volume control equipped unit. Clock source: Allows user to synchronize the C1.2 to an external clock, to the incoming audio stream, or to act as clock master. There is more information about optimizing clock configuration in the Advanced clocking chapter of this manual.

  • Page 23: Shortcuts

    Power off command: If Yes is selected, the C1.2 will enter standby mode when it receives a Power Off command from the LAN. It will remain on if No is selected. This is useful if you want to keep your C1.2 on even when you turn off the rest of your system.

  • Page 24: Factory Settings

    5.1.7 FACTORY SETTINGS Serial number: Displays the serial number of your C1.2. This serial number is also written on a sticker at the back of your C1.2. Firmware version: Indicates the version of the firmware that the C1.2 is currently running. Periodically check CH Precision’s website to see if a newer version is available.

  • Page 25: Handheld Remote Control

    6 Handheld remote control 6.1 Remote control operation The C1.2 DAC/Controller is delivered with an IR remote to control the unit’s basic operations. The provided remote control is not intended to be used to configure the unit.. C1.2 D/A Controller remote control 1.

  • Page 26: Changing The Remote Control Batteries

    If the battery compartment does not close securely, stop using the product and keep it away from children. If you think batteries might have been swallowed or placed inside any part of the body, seek immediate medical attention. C1.2 User Manual...

  • Page 27: Advanced Clocking

    S/PDIF audio source) and no SYNC-I/O board is fitted, both audio data and clocking goes from the source to the DAC. More precisely, clocking is sent with the audio stream. It is either carried on dedicated lines in the CH Link HD (while audio data is carried on other lines in the same cable) or embedded in S/PDIF’s bi-phase modulated signal.

  • Page 28: C1.2 Dac/Controller (With Sync-I/O Board) + D1.5 Or D1 Cd/Sacd Transport (With Sync-I/O Board)

    When both the C1.2 and the D1.5/D1 are equipped with a SYNC-I/O board, optimum performance is obtained when the C1.2 DAC is the clock master, and the D1.5/D1 transport is the clock slave. The audio stream goes from the D1.5/ D1 to the C1.2, but the clock signal goes the other way.

  • Page 29: C1.2 With D1.5/D1 (Both With Sync-I/O Board) And T1 Time Reference (Or Other 10Mhz External Master Clock)

    T1 to the individual devices are preferred over daisy-chaining. The audio stream goes from the D1.5/D1 to the C1.2, and the clock signal is distributed to both the D1.5/D1 and C1.2 from the T1. The schematic below shows how to connect such a system: CH LINK HD D1.5...

  • Page 30: C1.2 Dac/Controller + Computer (Usb Audio Input)

    When a C1.2 equipped with a USB-IN board is used together with a computer or music server for audio file playback, a type A (computer/server side) to type B (C1.2 side) USB 2.0 cable is used to connect the two. This single link enables data to flow from the computer to the C1.2, while the C1.2 dictates the pace of the data transfer, thus...

  • Page 31: Returning To Factory Defaults

    C1.2. The schematic below shows how to connect such systems: C1.2 connection to home network C1.2 clock source (for this input): INTERNAL C1.2 clock source when using T1 (for this input): Synchro BNC 75Ω Tablet Wifi Computer with LAN capability (e.g. NAS server)

  • Page 32: Firmware Update

    9.1 Preparing the USB stick The firmware of all the CH Precision units can be updated using the USB port located at the back of the unit. Before starting the firmware update, it is necessary to load a USB stick with files containing the new firmware.

  • Page 33: Emergency Firmware Update Procedure

    3. Connect the USB stick to the USB port located on the ETHERNET-IN HD or CONTROL board mounted on the back of your C1.2 unit. 4. Push and keep the encoder button pushed and power up the unit (back panel mains power switch to ON).

  • Page 34: Troubleshooting

    Change the batteries in the remote control if required (Remote control LED does not illuminate) Make sure the C1.2 is not configured as a Slave on the network (Settings / Network / Config) Make sure Factory Settings / Remote Control parameter matches your RC5...
  • Page 35 Restore factory settings and start your setup again Firmware update fails Try Emergency Software Update procedure If it fails, download the latest C1.2 firmware from www.ch-precision.com, prepare a software update on a FAT32 formatted USB stick and run the Emergency Software Update procedure again USB flash drive for firmware Please try another brand of USB flash drive (e.g.

  • Page 36: Specifications

    Android UPnP/DLNA controller app) acts as a front end to browse your music library and build playlists. If a Roon server is connected to your network, select the  Roon Ready  input of the C1.2 and select the CH C1.2 as the audio output device in Roon’s control software.
  • Page 37 (DSD256) and 22.5792 (DSD512) MHz, DFF and DSF files - MQA encoded files User control Dual concentric rotary knob with push function (control knob) and CH Control Android app Power supply Selectable 100V, 115V or 230V AC, 47Hz to 63Hz Power consumption (Standby) <...
  • Page 38 DSD (DoP) 1bit 2.8224 MHz USB Audio input (USB_IN board, one connector per board) USB Audio Class 1.0 (A-type plug) Asynchronous playback (C1.2 master, computer slave) PCM 16-24 bits / 44.1-96 kHz USB Audio Class 2.0 (A-type plug) Asynchronous playback (C1.2 master, computer slave) PCM 16-24 bits / 44.1-384 kHz...
  • Page 39 Remote control batteries 2x AAA type Design and Specifications are subject to change without notice. Weight and dimensions are approximate. Illustrations are informative only and may differ from the actual production model. Enclosure designed by Mana Ishoni. C1.2 User Manual...
  • Page 40 We strongly encourage you to recycle any batteries used with this component. CH PRECISION SÀRL Z.I. LE TRÉSI 6D • 1028 PRÉVERENGES • SWITZERLAND +41 (0)21 701 9040 • info@ch-precision.com www.ch-precision.com C1.2 User Manual...

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