{"product_id":"cambridge-audio-azur-851w","title":"Cambridge Audio Azur 851W Stereo Power Amplifier - Pre-Owned","description":"\u003cstyle\u003e\n  .hb-tabs { margin: 18px 0; border: 1px solid rgba(0,0,0,0.12); border-radius: 10px; overflow: hidden; }\n  .hb-tabs input { display: none; }\n  .hb-tab-labels { display: flex; gap: 0; border-bottom: 1px solid rgba(0,0,0,0.12); background: rgba(0,0,0,0.03); }\n  .hb-tab-labels label {\n    flex: 1;\n    padding: 12px 14px;\n    cursor: pointer;\n    font-weight: 600;\n    text-align: center;\n    user-select: none;\n  }\n  .hb-panels { padding: 14px 16px; background: #fff; }\n  .hb-panel { display: none; }\n\n  #hb-851w-tab-1:checked ~ .hb-tab-labels label[for=\"hb-851w-tab-1\"],\n  #hb-851w-tab-2:checked ~ .hb-tab-labels label[for=\"hb-851w-tab-2\"] {\n    background: #fff;\n    border-bottom: 2px solid rgba(0,0,0,0.65);\n  }\n\n  #hb-851w-tab-1:checked ~ .hb-panels #hb-851w-panel-1,\n  #hb-851w-tab-2:checked ~ .hb-panels #hb-851w-panel-2 {\n    display: block;\n  }\n\n  .hb-panels h3 { margin: 18px 0 12px; font-size: 1.05em; }\n  .hb-panels p { margin: 20px 0 6px; }\n  .hb-panels ul { margin: 8px 0 20px 18px; }\n\u003c\/style\u003e\n\u003cdiv class=\"hb-tabs\"\u003e\n\u003cinput checked id=\"hb-851w-tab-1\" name=\"hb-851w-tabs\" type=\"radio\"\u003e \u003cinput id=\"hb-851w-tab-2\" name=\"hb-851w-tabs\" type=\"radio\"\u003e\n\u003cdiv class=\"hb-tab-labels\"\u003e\n\u003clabel for=\"hb-851w-tab-1\"\u003eProduct Summary \u0026amp; Benefits\u003c\/label\u003e \u003clabel for=\"hb-851w-tab-2\"\u003eTech Specs \u0026amp; Box Contents\u003c\/label\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hb-panels\"\u003e\n\u003cdiv id=\"hb-851w-panel-1\" class=\"hb-panel\"\u003e\n\u003ch3\u003eProduct Summary\u003c\/h3\u003e\n\u003cp\u003eThe Cambridge Audio Azur 851W is a powerful high-end stereo power amplifier designed to deliver exceptional control, low distortion and effortless dynamics. Using Cambridge Audio's Class XD amplification technology, it combines the refinement associated with Class A operation with the efficiency and power of a conventional Class AB design.\u003c\/p\u003e\n\u003cp\u003eIn stereo operation the 851W delivers 200 watts per channel into 8 ohms, increasing to 350 watts per channel into 4 ohms, giving it the current and headroom needed to drive demanding loudspeakers with authority. It can also be configured for bridged mono operation, delivering up to 500 watts into 8 ohms.\u003c\/p\u003e\n\u003cp\u003eA substantial audiophile-grade toroidal transformer, separate transformer for the input circuitry and extensive heatsinking provide a stable foundation for high-power performance. Balanced XLR and unbalanced RCA inputs make the 851W easy to integrate with a wide range of preamplifiers and source components.\u003c\/p\u003e\n\u003cp\u003eThis is a \u003cstrong\u003epre-owned\u003c\/strong\u003e unit that has been well cared for. There is noticeable scratching on the right hand side panel but otherwise is in good condition. The power cable will be supplied but no manual, original box other accessories. It will be packed well in alternative packaging.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigh-power Class XD stereo power amplifier\u003c\/li\u003e\n\u003cli\u003e200W per channel into 8 ohms\u003c\/li\u003e\n\u003cli\u003e350W per channel into 4 ohms\u003c\/li\u003e\n\u003cli\u003e500W into 8 ohms in bridged mono mode\u003c\/li\u003e\n\u003cli\u003eSelectable stereo, mono and bridged mono operation\u003c\/li\u003e\n\u003cli\u003eExtremely low distortion\u003c\/li\u003e\n\u003cli\u003eOversized audiophile-grade toroidal transformer\u003c\/li\u003e\n\u003cli\u003eSeparate transformer for low-noise input circuitry\u003c\/li\u003e\n\u003cli\u003eBalanced XLR and unbalanced RCA inputs\u003c\/li\u003e\n\u003cli\u003eCAP5 protection technology\u003c\/li\u003e\n\u003cli\u003eAudio-detect automatic power operation\u003c\/li\u003e\n\u003cli\u003eRigid acoustically damped metal chassis\u003c\/li\u003e\n\u003cli\u003eSuitable for demanding high-performance loudspeakers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"hb-851w-panel-2\" class=\"hb-panel\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eAmplification\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAmplifier Type: Class XD Power Amplifier\u003c\/li\u003e\n\u003cli\u003eStereo Output: 200W per channel into 8 ohms\u003c\/li\u003e\n\u003cli\u003eStereo Output: 350W per channel into 4 ohms\u003c\/li\u003e\n\u003cli\u003eBridged Mono Output: 500W into 8 ohms\u003c\/li\u003e\n\u003cli\u003eBridged Mono Output: 800W into 4 ohms\u003c\/li\u003e\n\u003cli\u003eOperating Modes: Stereo, Mono and Bridged Mono\u003c\/li\u003e\n\u003cli\u003eDamping Factor: Greater than 110 at 1kHz\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAudio Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFrequency Response: 5Hz - 80kHz\u003c\/li\u003e\n\u003cli\u003eTHD: Less than 0.001% at 1kHz\u003c\/li\u003e\n\u003cli\u003eTHD: Less than 0.005% from 20Hz - 20kHz\u003c\/li\u003e\n\u003cli\u003eSignal-to-Noise Ratio: Greater than 90dB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBalanced XLR analogue inputs\u003c\/li\u003e\n\u003cli\u003eUnbalanced RCA analogue inputs\u003c\/li\u003e\n\u003cli\u003eInput Impedance: 38k ohms balanced\u003c\/li\u003e\n\u003cli\u003eInput Impedance: 68k ohms unbalanced\u003c\/li\u003e\n\u003cli\u003eInput Sensitivity: 1.5V RMS in stereo\/mono operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eControl \u0026amp; Protection\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCAP5 protection system\u003c\/li\u003e\n\u003cli\u003eAudio-detect automatic power up\/down\u003c\/li\u003e\n\u003cli\u003e12V trigger connectivity\u003c\/li\u003e\n\u003cli\u003eLess than 0.5W standby consumption\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions \u0026amp; Weight\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHeight: 148mm\u003c\/li\u003e\n\u003cli\u003eWidth: 430mm\u003c\/li\u003e\n\u003cli\u003eDepth: 365mm\u003c\/li\u003e\n\u003cli\u003eWeight: 19.1kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePlease note:\u003c\/strong\u003e The Cambridge Audio Azur 851W is a discontinued \/ archived model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Cambridge Audio","offers":[{"title":"Default Title","offer_id":62475777900931,"sku":null,"price":500.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0160\/4606\/3670\/files\/Untitleddesign-2026-08-28T140718.943.png?v=1787922496","url":"https:\/\/www.holburnonline.co.uk\/products\/cambridge-audio-azur-851w","provider":"Holburn Online","version":"1.0","type":"link"}