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Cambridge Audio Azur 851C Flagship Upsampling DAC, CD Player & Preamplifier


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Product Description

Azur 851C

Flagship Upsampling DAC, CD Player & Preamplifier

Our finest CD player and DAC, the 851C uses our extensive digital knowledge to become the cornerstone of your digital hub. No matter the source of your digital music, twin DACs in dual differential mode and 2nd generation Adaptive Time Filtering make the music sound as the original artist intended – extraordinary.

SOUND PERFECTION

 

The 851C uses audiophile grade components throughout and incorporates our most advanced technologies to ensure it plays music perfectly. Your discs are spun on our own audio-only transport and coupled with our S3 servo to give error-free data retrieval and jitter minimisation. Our ultra-rigid metal construction also ensures components are isolated and free from vibration.

All data is then put through our 2nd generation Adaptive Time Filtering that upsamples everything to 24bit/384kHz hi-res quality, no matter the original source. As a result, jitter is almost completely absent, and the music sounds amazing. Read more on our proprietary ATF upsampling technology here.

The upsampled music then passes through Twin Analog Devices DACs (very high-end digital to analogue converters) which are implemented in a dual differential configuration meaning each channel has its own DAC to process data. The result is lifelike stereo imaging where instruments can be heard in specific parts of your room with uncanny accuracy.

All of these audiophile internals are powered by a large toroidal transformer for the best delivery of a high quality and consistent signal with low noise and buzz levels.

 

DIGITAL PRE-AMPLIFIER

With premium XLR and RCA outputs you can then connect the 851C to the perfectly compatible 851A integrated amplifier with other sources. The 851C also has a digital volume stage built in so it can be used as a pure pre-amplifier – just connect it straight into our 851W power amplifier or a pair of active speakers for further sonic benefits.

DIGITAL FILTERS

We built the 851C with three selectable filters, linear, minimum and steep, this allows you to choose the type of sound that suits your ideal listening preferences.

CONNECTIONS AND FLEXIBILITY

The 851C isn’t just built for playback of CDs; we wanted to make the most of its ATF upsampling and superb DACs, so it’s a complete digital hub which can connect to almost anything digital. It’s got optical and co-axial digital in and outputs plus an asynchronous USB audio input. So you can connect up TVs, streamers, PCs, MACs and more, and everything will be upsampled to amazing hi-res quality.

 

Technical specifications

  • Digital to analogue convertersDual Analog Devices AD1955 24-bit DACs
  • Digital filterAnalog Devices Black Fin ADSP-BF532 32 bit DSP performing 2nd Generation ATF2 upsampling to 24-bit/384kHz. Linear Phase, Minimum phase or Steep modes.
  • Analogue filter2 Pole Fully Differential Linear Phase Bessel filter
  • Digital input 1S/PDIF 75 Ohms or TosLink optical
  • Digital input 2S/PDIF 75 Ohms or TosLink optical
  • AES/EBU inputXLR balanced 110 Ohms per phase
  • USB audio inputUSB Type B conforming to Audio profile 1.0 or 2.0 (user selectable)
  • Audio outputsBalanced XLR and unbalanced RCA analogue audio outputs
  • CompatibilityUSB 1.0 16-24 bit, 32-96kHz 
    USB 2.0 16-24 bit, 32-192kHz 
    TosLink 16-24 bit, 32-96kHz 
    S/PDIF and AES/EBU 16-24 bits 32-192kHz 
    CD playback is intrinsically limited to 16-bits 44.1kHz
  • THD (unweighted) @ 1kHhz 0dBFs< 0.0004%
  • THD (unweighted) @ 1kHz -10dBFs< 0.0004%
  • THD (unweighted) @ 20kHz 0dBFs< 0.0007%
  • IMD (19/20kHz) 0dBFs< 0.0002%
  • Linearity @ -90dBFs+/- 0.2dB
  • Linearity @ -120dBF+/- 0.4dB
  • Stop-band rejection (>24kHz)> 120dB
  • S/N ratio (ref 1w)> 113dB
  • Total correlated jitter< 60pS for all digital inputs, CD playback and USB 2.0 
    < 180pS for USB 1.0
  • Crosstalk @1kHz< -130dB
  • Crosstalk @20 kHz< -114dB
  • Output impedance< 50 Ohms
  • 0dB Fs output2.2Vrms (2.2Vrms each phase for the balanced output)
  • Max. power consumption40W
  • Idle consumption8W
  • Standby power consumption<0.5W
  • ColourBlack or silver
  • Dimensions (WxHxD)430 x 115 x 360mm (16.9 x 4.5 x 14.7”)
  • Weight10.0Kg (22lbs)

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