2 azur 851C Your music + our passion Downloaded From Disc-Player.
Contents Introduction Introduction..................................................................................................2 Important safety instructions......................................................................3 Limited warranty...........................................................................................4 Front panel controls.....................................................................................6 Remote control.............................................
azur 851C ENGLISH Important safety instructions For your own safety please read the following important safety instructions carefully before attempting to connect this unit to the mains power supply. They will also enable you to get the best performance from and prolong the life of the unit: 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with a dry cloth. 7.
Limited warranty Ventilation IMPORTANT – The unit will become hot when in use. Do not stack multiple units on top of each other. Do not place in an enclosed area such as a bookcase or in a cabinet without sufficient ventilation. Ensure that small objects do not fall through any ventilation grille. If this happens, switch off immediately, disconnect from the mains supply and contact your dealer for advice. Positioning Choose the installation location carefully.
azur 851C 8 1 2 4 5 ENGLISH Rear panel connections 12 9 14 6 3 7 1 10 Power On/Off Always turn the Volume to minimum, switch to another input or turn the 851C off before plugging/unplugging cables to the USB input or whilst booting up/shutting down your PC/Mac. Switches the 851C on and off. 2 Mains Voltage Selector Switch (CU version only) Switches the 851C mains voltage between 100V and 115V.
Front panel controls 7 6 1 1 2 3 4 5 Standby/On Switches the 851C between Standby mode and On. Standby is a low power mode where the consumption is less than 0.5W. The 851C can be left in Standby mode when not in use. 2 Menu Press to enter the 851C's setup menus. Various 851C operating parameters can be configured. Menus are shown by the 851C display and accessed through the front panel Select and buttons. Refer to the ‘Operating instructions’ section for more information.
azur 851C The 851C is supplied with an Azur Navigator remote control handset that duplicates the front panel control functions and is also able to control Azur series amplifiers. The supplied AAA batteries must be fitted before the remore control can be used. The following buttons are used to control Cambridge Audio Azur range amplifiers only (such as the matching 851A) or when the 851C has been set to preamp mode (Digital Volume Enabled).
Operating instructions Once all the required input and output connections are made, the 851C can be switched on using its rear panel Power switch and front panel or handset Standby/On button. The amplifier to which the 851C is connected should also be switched on, the appropriate input selected, and its volume control set at the appropriate level. Repeating discs and tracks Either front panel or handset buttons can be used for the majority of the 851C control functions.
851C Using digital inputs The 851C is fitted with four digital inputs for the connection of external digital sources. When a digital input is selected, digital audio from external devices will be up-sampled and delivered to the 851C analogue outputs. The digital outputs always output the incoming data without any processing.
Operating instructions cont. Advanced USB audio The 851C is both USB 2.0 (Hi-Speed) and USB 1.1 (Full-speed) USB port compatible. It should also work with the new USB 3.0 ports where the PC will simply treat the 851C as if it were a USB 2.0 or 1.1 device. The 851C also supports two USB Audio protocols (not the same as the port types themselves) USB Audio 1.0 (which works over USB 1.1 ports and supports up to 24-bit/96kHz) or USB Audio 2.0 (which requires a USB 2.0 port and can support up to 24-bit/192kHz).
851C Digital Pre-amp Mode The 851C can optionally be used as a digital pre-amp and connected directly to a suitable power-amp. The level at both the balanced XLR and single-ended Phono/RCA outputs is affected and either connection type can be used, see diagram below. Before making this connection access the 851C's Digital Volume menu by pressing the Menu button then using the and buttons to move to the Digital Volume item.
Operating instructions cont. Filters Menu structure Auto Off Off 5m 10m 15m Auto Play USB Class On Off Audio 2 Audio 1 Input Naming S/W Version Front IR Digital Volume Ch. Balance On Off Off On (Note: Only available if Digital Volume is enabled) Digital 1 Digital 2 AES/EBU The 851C menu structure has a variety of setup parameters that can be adjusted to suit both specific installation requirements and personal preferences.
Minimum Phase Filter 851C Steep Filter Frequency response Frequency response 20 0 0 -20 -20 -40 -40 -60 -60 Magnitude (dB) Magnitude (dB) 20 -80 -100 -120 -100 -120 -140 -160 -160 -180 -180 -200 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Linear phase filter -80 -140 -200 Steep filter 1 0 0.1 0.2 frequency/FS (input sampling rate) 0.3 0.4 0.5 0.6 0.7 0.8 0.
Operating instructions cont. Custom installation (C.I.) use Troubleshooting The 851C incorporates a Control Bus input and output that enables unmodulated handset commands (positive logic, TTL level) to be received electrically by the unit and looped to another unit if desired. These control commands are typically generated by custom installation (multiroom) systems or remote IR receiver systems. The Control Bus sockets are colour-coded orange.
azur 851C ENGLISH Technical specifications All measurements are for 24-bit signals via the digital inputs so as not to be source material limited unless stated. D/A converters Dual Analog Devices AD1955 24-bit DACs Digital filter Analog Devices Black Fin ADSP-BF532 32-bit DSP performing 2nd Generation ATF2 up-sampling to 24-bit 384kHz Linear Phase, Minimum phase or Steep modes.
Cambridge Audio is a brand of Audio Partnership Plc Registered Office: Gallery Court, Hankey Place London SE1 4BB, United Kingdom Registered in England No. 2953313 © 2012 Cambridge Audio Ltd Downloaded From Disc-Player.com Cambridge Audio Manuals AP24951/4 www.cambridge-audio.
