Azur 851A Integrated Class XD Amplifier

Azur 851A Integrated Class XD Amplifier


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Discover the Unmatched Performance of the Cambridge Audio Azur 851A Integrated Amplifier

Unlock the full potential of your audio setup with the secondhand Cambridge Audio Azur 851A Integrated Amplifier, meticulously maintained and in good condition. Boasting incredible power, finesse, and astonishingly low distortion, the 851A is the epitome of sonic excellence.

Pricing available on application which will includes installation and shipping costs to your nominated location

Sound Quality:

Prepare to be captivated by the unparalleled sound quality of the Azur 851A. With a formidable rating of 120 Watts per channel and a meticulous attention to detail, this amplifier delivers music with astounding depth and clarity. The precision volume control ensures remarkable stereo separation, breathing new life into your music collection.


Designed without compromise, the 851A offers extensive connectivity options. Nine RCA inputs accommodate regular analog inputs, while two sets of balanced XLR inputs cater to high-end components. Additionally, a pre-out allows seamless connection to a subwoofer or power amp, while dual sets of speaker terminals support bi-wiring or additional speakers in a second location. Control Bus inputs enable easy linking of compatible Cambridge Audio products for unified control from a single remote.

Class XD + Two Transformers:

Unlike traditional Class A or Class AB amplifier designs, the 851A employs the innovative Class XD technology, combining the sonic purity of Class A with the efficiency of Class AB for exceptional performance. The primary toroidal transformer delivers unrestricted power to the dual mono amplification blocks, ensuring distortion-free operation. Meanwhile, a secondary toroidal transformer manages pre-amplification processes with precision.

Tech Specs:

  • Power Output: 120W RMS into 8 Ohms, 200W RMS into 4 Ohms
  • THD (Unweighted): < 0.001% at 1 kHz (80% of rated power), 0.01% 20 Hz – 20 kHz (80% of rated power)
  • Audio Inputs: 2 x balanced XLR, 8 x RCA inputs
  • Audio Outputs: Preamp output, Record output
  • Frequency Response: 10 Hz – 50 kHz +/- 1 dB
  • S/N Ratio (Ref 1W): > 93 dB (ref 1W/8 Ohm)
  • Input Impedance: 20 kOhm
  • Power Amp Damping Factor: > 110 at 1 kHz
  • Max. Power Consumption: 800W
  • Dimensions (W x H x D): 430 x 115 x 385mm
  • Weight: 15.0 kg

In the Box:

  • Cambridge Audio Azur 851A Integrated Amplifier
  • Power Cable
  • 3 x AAA Batteries
  • Remote Control

Experience the pinnacle of audio performance with the Cambridge Audio Azur 851A Integrated Amplifier. Elevate your listening experience and immerse yourself in unparalleled sonic clarity and depth.

Weight 15 kg
Dimensions 430 mm

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At Len Wallis Audio, whether you’re purchasing in store, over the phone or online through our ecommerce store, we want you to be completely satisfied with your purchase.

Our Refund, Return and Repairs Policy is here to clarify any concerns or questions you might have prior to you making a purchase from us. This way you can be sure of our policy on refunds, returns and repairs and your rights under the Australian Consumer Law.

We also recommend you immediately inspect any goods that you receive from us to ensure you are completely satisfied with the goods, including that the goods are of acceptable quality, and match the description we have provided to you.

If you have any questions about this policy, please contact us at or 02 9427 6755

We require a receipt or proof of purchase.

  • Please do not send your purchase back to the original manufacturer.
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    • Any item not in its original condition, is damaged or missing parts for reasons not due to our error
    • Any item that is returned for reason of change of mind more than 14 days after delivery or purchase from the store.

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Refer to our page for more information.

Goods Damaged in Transit.

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Where Len Wallis Audio considers the goods to have breached a consumer guarantee, any shipping costs to return the goods to Len Wallis Audio will be at our cost.

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You may visit Len Wallis Audio and a staff member will assist you with any return or repair. This may include inspecting the goods, arranging for the goods to be repaired, or providing you with a replacement.

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If any goods cannot be easily returned to us due to their size, the fault or because they have been affixed or installed in your premises, please contact us and we will arrange an inspection to assess the goods.

Goods returned for repair will be assessed and/or repaired within a reasonable time. You may be provided with an indicative repair time, which time may vary due to reasons beyond ours or the repairer’s reasonable control, such as part availability and incorrect fault description.

You may be required to pay labour, assessment and/or freight fees, such as where goods are assessed to have been damaged by misuse or accident, or where your rights under the Australian Consumer Law or any manufacturer’s warranty do not apply. We may provide you with an indicative fee, which may vary due to reasons beyond our control.

If any goods that you return are capable of retaining user generated data such as files stored on a hard drive, and songs stored on a portable media player, the replacement or repair of the goods may result in loss of the data. In these circumstances, we recommend you back up data to prevent data loss, and remove sensitive or confidential data, as a party assessing and/or repairing your goods may be required to view data in the course of carrying out the assessment. We will not be responsible for any data loss.

In some circumstances, goods presented for repair may be replaced by refurbished goods of the same type rather than being repaired. Refurbished parts may be used to repair the goods.

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We understand that sometimes you may simply change your mind about a purchase or have made a wrong selection. In these situations, you have 14 days in which to return your item for a refund, exchange or store credit. If more than 14 days has passed since your purchase we can’t offer you a refund, exchange or store credit.

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Please note that current Australian Consumer Law does not require us to offer a ‘Change of Mind’ refund. Rather Len Wallis Audio offers 14 day ‘Change of Mind Policy’ in good faith. For more information on consumer rights and guarantees, please visit the Australian Competition and Consumer Commission web site.