User’s manual 2 azur 851W Your music + our passion ENGLISH Power Amplifier
Contents Introduction Introduction..................................................................................................2 Thank you for purchasing this Azur 851W Class XD™ power amplifier. We are confident that you will enjoy many years of listening pleasure from it. Like all Cambridge Audio products the Azur 851W adhere to our three core principles – stunning performance, ease of use and incredible value. Important safety instructions.........................................................
azur 851W 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. Do not remove the feet from this product they are required to ensure enough air flow. 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.
azur 851W 1 5 ENGLISH Rear panel connections 1 12 7 11 8 6 10 2 3 4 9 4 3 2 1. Loudspeaker terminals 6. Mono mode switch For normal wiring, connect the wires from your left channel loudspeaker to the LEFT + & - terminals, and the wires from the right channel loudspeaker to the RIGHT + & - terminals. In each case, the red terminal is the positive output and the black terminal is the negative output. When Mono mode has been selected, switches the 851W between BiAmped Mono and Bridged Mono.
Front panel azur 851W Class XD Power Amplifier 1 Standby / On 2 3 4 5 6 2 3 4 1. Standby/On 5. Bridged Switches the unit between Standby mode (indicated by dim power LED) and On (indicated by bright power LED). Standby mode is a low power mode where the power consumption is less than 0.5 Watts. The unit should be left in Standby mode when not in use. This LED indicates that the 851W is being used in Bridged mode. (The Mono LED will also be illuminated.
azur 851W The 851W features both balanced (XLR) and unbalanced (RCA/Phono) output connections. For the best quality we recommend you use a balanced output with pre-amplifiers that feature this connection (such as our own 851E Pre-Amplifier). Before making any connections to loudspeakers, make sure all power is turned off and only use suitable interconnects (e.g. banana plugs). Ensure that the positive (+) and negative (-) connections are matched.
Power syncing (On/Standby control) When going in/out of Standby mode the Azur 851E pre-amplifier can (if desired) automatically control the 851W when connected via the Control Bus sockets (the Control Bus sockets are colour-coded orange on the rear panels of compatible Azur models). For this feature to work the units must be connected together by RCA/phono leads. No further setup is necessary. Connect the Control Bus Out from the 851E to the Control Bus In on the 851W.
azur 851W ENGLISH Bi-amped dual mono connections The 851W features Mono and Bi-Amped Mono settings that allow two (or more) 851Ws to be used as mono-blocs for high end systems. Below is an example using two 851Ws in Bi-Amped Mono with an 851E. Important 851W settings In Bi-Amped Mono mode each 851W drives one speaker. I n this configuration the Stereo/Mono switch on the 851W must be set to 'Mono' and the Mono mode switch must be set to 'Bi-Amp'. Note: Unbalanced connections can also be used.
Powering On/Off the 851W Configuration menu As well as simply using the front panel button the 851W features multiple ways it can be automatically powered on and off. In Standby mode, press and hold the Standby/On button to enter the Configuration menu. A trigger 5-12V AC or DC input to the Trigger In on the rear panel can power up or down the unit from custom install systems or preamps with trigger outputs.
azur 851W Cambridge Audio has developed a proprietary protection system to ensure reliability and long life of its amplifiers. This protection system comprises five main protection methods: 5. Intelligent clipping detection 1. DC detection Description – CAP5 has the ability to detect when the amplifier starts to clip or overdrive at its output, which can damage loudspeakers and degrade the sound.
Technical specifications Troubleshooting Power Output - Stereo/Mono 200W per channel 8 Ohms 350W per channel 4 Ohms There is no power Power Output - Bridged Mono 500W 8 Ohms 800W 4 Ohms Ensure the plug is fully inserted into the wall socket and is switched on. THD (unweighted) < 0.001% 1kHz < 0.005% 20Hz - 20kHz Frequency Response 5Hz - 80kHz ±1dB S/N ratio (ref 1W/8 Ohm) > 90 dB (unweighted) Sensitivity Stereo or Mono = (for 200W 8 Ohms) 1.5V rms unbalanced 1.5 + 1.
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