Cambridge Audio 840A - Manual

840A Class XD integrated amplifier Azur Class XD integrated amplifier 5 IMPORTANT SAFETY INSTRUCTIONS Please take a moment to read these notes before installing your Azur amplifier, they will enable you to get the best performance and prolong the life of the product. We advise you follow all instruc...

6 Azur Class XD integrated amplifier Power On/Off Switches the unit on and off. AC power socket Once you have completed all connections to the amplifier, plug the AC power cable into an appropriate mains socket then switch on. Your amplifier is now ready for use. Loudspeaker terminals Two sets of lo...

840A Class XD integrated amplifier Azur Class XD integrated amplifier 7 RS232C The RS232C port allows external serial control of the 840A for custom install use. A full command set is available on the Cambridge Audio website at www.cambridge-aaudio.com. This port can also be used by Cambridge Audio ...

8 Azur Class XD integrated amplifier Standby/On Switches the unit between Standby mode (indicated by dim power LED)and On (indicated by bright power LED). Standby is a low power modewhere the power consumption is less than 10 Watts. The unit should beleft in Standby mode when not in use. Phones Allo...

10 Azur Class XD integrated amplifier The 840A is supplied with an Azur Navigator remote control thatoperates both this amplifier and Cambridge Audio Azur CDplayers. Insert the supplied AAA batteries to activate. The 840A/C remote control comes with an AmplifierControl button, that when pressed, put...

840A Class XD integrated amplifier Azur Class XD integrated amplifier 11 When designing our amplifiers we have tried to include features thatallow you to connect your system in various ways. The inclusion offeatures such as Pre-Out and Speaker B connections mean that you canflexibly configure your s...

12 Azur Class XD integrated amplifier CONNECTIONS (CONTINUED) Speaker B connections The Speaker B connections on the back of the amplifier allow for asecond set of speakers to be used (i.e. speakers located in anotherroom). The Speaker A/B button on the front panel allows this second setof speakers ...

840A Class XD integrated amplifier Azur Class XD integrated amplifier 13 Balanced audio connections The diagram below shows how to connect the 840A to the Azur 840CUpsampling CD player using the Balanced Audio inputs via three-pin XLRconnectors (Note: the 840A can also be connected to non-CambridgeA...

Balance Press the Mode button to enter Balance mode. BALANCE will appear on the display and can be adjusted using the volume control. Press the Mode button again to return to Volume mode or wait 5 seconds for the 840A to automatically exit Balance mode. Bass and Treble These controls allow subtle ad...

The 840A features many advanced settings that allow its use to be becustomised to user preference. The inputs can be named to reflect theactual source units you have, each input can be trimmed so that eachsounds the same in terms of loudness when you switch between themand other options. Changing in...

16 Azur Class XD integrated amplifier Volume display To change the volume display from decibels (-84 to 0dB) to arbitraryvolume units (0 to 72 units) select VOL DB in the System Configuremenu. Press the input select button to turn off the volume in decibels.Press the Mode button to exit. Input gain ...

Select the connected Azur models by pressing the appropriate inputselect button. For example, CA XXXC for an Azur CD player (540C V2,640C V2), CA XXXD for an Azur DVD player, CA DAB T for an Azur DABtuner etc. Press ON & OFF to scroll through the options of ON (turns all Azur unitson only), OFF ...

The 840A features Incognito Ready TM / A-BUS TM Ready outputs, allowing multi-room capability. One or two amplified keypads can be plugged intothe amplifier (using Cat5/5e cable and RJ45 plugs) to provide multi-room audio in one or two secondary rooms or zones. The keypads arepowered by an external ...

It is then possible to control the source equipment from the remoterooms by using the source equipment's own remote controls or througha learning remote. The Incognito LR10 can fully control the keypads,“learn” the source's remote control codes (including those from othermanufacturers) and change so...

20 Azur Class XD integrated amplifier If the unit has not fully cooled down then the temperature may reach the limit soon after the amplifier is powered up. If the loudspeaker impedance is low the temperature of the amplifier may rise faster as the amplifier is working harder. If the amplifier is mo...

840A Class XD integrated amplifier Azur Class XD integrated amplifier 21 It is possible to disable the short circuit detection feature by pressing the SHORT DT button to off when in the 840A System Configure menu. This would only be required if the loudspeakers have very low DC resistance. 5. Intell...

22 Azur Class XD integrated amplifier There is no power Ensure the AC power cord is connected securely. Ensure the plug is fully inserted into the wall socket and is switched on. Check fuse in the mains plug or adaptor. There is no sound Make sure the unit is not in Standby mode. Check that source c...

840A Class XD integrated amplifier Azur Class XD integrated amplifier 23 840A Power Output 120W RMS into 8 Ohms200W RMS into 4 Ohms THD (unweighted) < 0.0015% 1 kHz at 80% of rated power < 0.015% 20 Hz - 20 kHz at 80% of rated power Frequency Response 10 Hz - 50 kHz +/- 1 dB S/N ratio (ref 1W/...

Cambridge Audio warrants this product to be free from defects inmaterials and workmanship (subject to the terms set forth below).Cambridge Audio will repair or replace (at Cambridge Audio's option) thisproduct or any defective parts in this product. Warranty periods may varyfrom country to country. ...