Cambridge Audio 851D


Brand Cambridge Audio

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Digital music now comes from a multitude of sources, but your PC’s sound card is an afterthought. Pass the same file through the 851D’s twin DACs in dual differential mode and its 2nd generation Adaptive Time Filtering process and the music will sound extraordinary – just as the original artist intended.

We built the 851D using all our hi-fi know-how, so it has a large toroidal transformer, audiophile internal components and connectivity with as many sources as possible. There are digital TOSLINK, S/PDIF, BNC and AES/EBU inputs, while if you add a BT100 Bluetooth dongle you can pair with compatible devices. For your PC there’s an asynchronous USB audio input with a dedicated drive, allowing you to bypass the PC’s poor audio path.

The outpus are similarly designed with flexibility in mind, with both digital, balanced XLR and traditional RCA sockets. As the 851D is also a pre-amp so can be directly connected to a power amp such as our 851W or active speakers for further sonic benefits.


  • DACDual Analog Devices AD1955 24-bit DACs
  • UpsamplingAnalog Devices Black Fin ADSP-BF532 32-bit DSP performing 2nd Generation ATF2 upsampling to 24-bit/384kHz. Linear phase, minimum phase or steep modes.
  • Digital inputsS/PDIF, TosLink optical, BNC, AES/EBU, BT100 Bluetooth
  • USB audio inputUSB Type B conforming to Audio profile 1.0 or USB Audio profile 2.0 (user selectable) 1.0 or USB Audio profile 2.0 (user selectable)
  • Analogue audio outputsBalanced XLR and unbalanced RCA analogue audio outputs.
    1 ¼" / 6.35mm headphone output (supports 600 Ohm headphones, however 300 Ohms max recommended)
  • Sample rates supportedUSB Audio 1.0 16-24 bit, 32-96kHz
    USB Audio 2.0 16-24 bit, 32-192kHz
    TosLink 16-24 bit, 32-96kHz
    S/PDIF 16-24 bit, 32-192kHz
    BNC 16-24 bit, 32-192kHz
    AES/EBU 16-24 bit, 32-192kHz
    BT100 Bluetooth receiver: A2DP plus aptX
  • Maximum power consumption40W
  • ColourBlack or silver
  • Dimensions (HxWxD)115 x 430 x 360mm (4.5 x 16.9 x 14.7”)
  • Weight7.5kg (16.5lbs)


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