User manual CAMBRIDGE AUDIO AZUR 651A

[. . . ] Integrated amplifier User’s manual 2 azur 651A Your music + our passion ENGLISH Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Important safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Limited warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Rear panel connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] It is possible for the sound quality to be affected if the screw terminals are loose. The use of A and B speakers affords you an easy and inexpensive way to create a simple multi-room system. Note: When using two pairs of speakers, use speakers with a minimum nominal impedance of 8 ohms. 4 These inputs are suitable for any 'line level' source equipment such as BD/DVD players, DAB or FM/AM tuners, CD players, Netwok Players, iPod docks, MP3 players, etc. They should not be connected to the digital output of a CD player or any other digital device. Connecting a turntable If it is desired to connect a turntable without a built-in phono stage, an external phono stage such as our 551P or 651P models should be used. Note: A very few turntables have built-in phono stages, in which case it is not necessary to use a separate phono stage amplifier. If you’re unsure, please consult your turntable user manual. 10 USB interface IR (Infrared) Emitter In A USB B type socket is fitted to the 651A to enable the playback of audio from a personal computer running either Microsoft Windows or Apple Mac OS X operating systems. Note: Always use a certified cable for USB Audio preferably one that displays an official mark. USB cable connections longer than 3m may result in inconsistent audio performance. Allows modulated IR commands from multi-room systems or IR repeater systems to be received by the amplifier. Refer to the ‘Custom Installation’ section for more information. 5 Control Bus In Allows un-modulated commands from multi-room systems or other components to be received by the unit. Out Loop out for control bus commands to another unit. 6 Always turn the Volume to minimum, or turn the 651A off before plugging/unplugging cables to the USB input or whilst booting up your PC/Mac. Sub-Out This output can be used to connect to a subwoofer, if desired. 5 Connections Note: Before making any connections, make sure that the 651A is turned off. When designing our amplifiers we include features that allow you to connect your system in various ways. The inclusion of features such as Pre-Out and Speaker B connections mean that you can flexibly configure your system depending on your requirements. Basic connection The diagram below shows the basic connection of your amplifier to a CD player and a pair of loudspeakers. Right speaker Left speaker Black Red Red Black Black Red Black Red Amplifier CD player Record out connection The diagram below shows how to connect the amplifier to a tape recorder or other component with a record function. Please note that either of the record outputs can be used (as they are both the same signal in parallel). Right speaker Left speaker Amplifier Tape/MD player 6 azur Speaker B connections The Speaker B connections on the back of the amplifier allow for a second set of speakers to be used (i. e. The Speaker A/B button on the remote control allows the two sets of speakers to be toggled on and off. Refer to the Remote Control section of this manual for more information on the Speaker A/B operation. Note: When using two pairs of speakers, use speakers with a minimum nominal impedance of 8 ohms each. 651A ENGLISH Speaker A Main Room Amplifier Speaker B Room Two Pre-Out connections The Pre-Out sockets are for connecting to the input sockets of a power amplifier, or active subwoofer. The diagram below shows how to connect the amplifier to an active subwoofer via either a mono Sub in or Stereo Line In inputs on the subwoofer. Right speaker Left speaker Amplifier Or Sub In Line In Subwoofer 7 Connections cont. USB audio connections The diagram below shows how to connect the amplifier to a personal computer via USB connection. Connect a USB ‘B-A’ type lead from the 651A USB input to one of the USB ports on the PC. The 651A is USB 1. 1 (Full-speed) USB port compatible and support USB Audio 1. 0, which works with nearly all common operating systems (Windows XP, Vista or 7 and Mac OS X 10. 5 or higher) and computer types without drivers and allows 16 bit audio at 32kHz, 44. 1kHz and 48kHz to be received. The 651A also works with most builds of Linux using the native Audio 1. 0 driver. Because Linux builds vary according to their creator’s choice of software components including drivers, it is not possible to guarantee operation and Audio drivers may need to be loaded. [. . . ] Overvoltage/overcurrent detection Indicator – Unit has switched off during operation, protection LED constantly flashes in bursts of three. Description – CAP5 offers V/I protection by constantly monitoring the output transistors to keep them working inside their Safe Operating Area (SOA). The SOA is a set of limits given by the output transistor manufacturer to ensure reliability. V/I also protects the amplifier against short-circuits on the speaker terminals during use. [. . . ]