User’s manual 2 azur 651W Your music + our passion ENGLISH Power Amplifier
Contents Important safety instructions......................................................................3 Make sure you register your purchase. Visit: support.cambridgeaudio.com By registering, you’ll be the first to know about: Future product releases Software upgrades News, events and exclusive offers plus competitions! Limited warranty...........................................................................................4 Rear panel connections............................................
azur 651W 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 651W ENGLISH Rear panel connections 1 2 4 9 10 3 5 6 7 8 1. Power On/Off 7. Trigger In, Out/Thru Switches the unit on and off. If the 651W is not going to be used for long periods of time it should be turned off using this switch. For Custom Install use or with preamps and with trigger outputs, the 651W can be turned on and off (i.e. brought in and out of Standby mode) by the presence of 5-12V DC at the Trigger input.
Front panel 1 2 3 4 2 3 4 1. Standby/On 4. Clipping 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 651W has detected that either the Left or Right channel is being overdriven or clipped.
azur 651W The 651W 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 651W 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 651W.
azur 651W ENGLISH Configuration menu In Standby mode, press and hold the Standby/On button to enter the Configuration menu. The Left and Right ‘Output’ LED will start blinking to indicate that you are now in the Configuration menu. Pressing the Standby/On button will shuffle through these different setting options: Right ‘Protection’ LED - Auto power down enabled (by default). Right ‘Protection’ and ‘Clipping’ LED - Auto power down and auto power up enabled.
CAP5: Five-way protection system 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.
azur Troubleshooting ENGLISH Technical specifications 651W Power output 500W 8 Ohms 800W 4 Ohms There is no power THD (unweighted) < 0.001% 1kHz < 0.005% 20Hz - 20kHz Ensure the plug is fully inserted into the wall socket and is switched on. Frequency Response 5Hz - 80kHz ±1dB Check fuse in the mains plug or adaptor. S/N ratio (ref 1W/8 Ohm) > 90 dB (unweighted) There is no sound Sensitivity 1.5V rms unbalanced 1.5 + 1.
Cambridge Audio is a brand of Audio Partnership Plc Registered Office: Gallery Court, Hankey Place London SE1 4BB, United Kingdom Registered in England No. 2953313 © 2016 Cambridge Audio Ltd AP32813/3 www.cambridge-audio.
