User manual MERIDIAN AUDIO 559

[. . . ] 19 Service and guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Provides suggested solutions to typical problems. the stereo power amplifier, and explains what you should do if it requires servicing. 1 Setting up the stereo power amplifier 7 Troubleshooting 17 iii Preface Preface iv Introduction In choosing the 559 Stereo Power Amplifier you have acquired a component that combines major advances in audio and engineering design. The 559 Stereo Power Amplifier uses a unique feedback topology and precision local error correction system. [. . . ] Do not attempt to lift it without assistance. To avoid overheating During normal operation the internal heatsinks may become quite hot. The stereo power amplifier should therefore be positioned to allow a free flow of air through the cooling vents from the base to the top. Do not place the stereo power amplifier: In direct sunlight. Stacked with any other audio products, as the heat it generates may damage the other products. Do not restrict airflow through the top and bottom vents. Before connecting power Before you begin installation you should ensure that your stereo power amplifier is set to the correct voltage for your local AC supply. If it is not, do not try to install the unit, and contact your dealer. Do not make connections, or insert or remove plugs, while the unit is connected to the supply and switched on, as the transients generated could damage the loudspeakers. 8 Connecting the stereo power amplifier Back panel Select right balanced/ unbalanced input INPUT SELECTOR UNBALANCED ON BALANCED OFF BALANCED Power and fuse Select left balanced/ unbalanced input INPUT SELECTOR UNBALANCED UNBALANCED UNBALANCED BRIDGE MODE INPUT BALANCED BALANCED Setting up the stereo power amplifier RIGHT TRIGGER INPUT LINK FOR BRIDGED MODE LEFT ­ ­ + OFF ON BRIDGE MODE + Right outputs Select bridge mode Left outputs 9 Outputs The following table gives details of the output connections: Use this output LEFT, RIGHT To connect to this Loudspeakers of 2 to 16, using either plug or bare wire connections. BRIDGE MODE Setting up the stereo power amplifier Inputs The following two alternative audio inputs are provided: Use this input UNBALANCED To connect to this A preamplifier, using phono connectors and high-quality screened cable. BALANCED A balanced analogue output, using XLR connectors: 1 (Green) = GND 2 (Red) = +ve 3 (Black) = -ve Select the appropriate input using the INPUT SELECTOR for each channel. A loudspeaker of 2 to 16; see To wire to a passive loudspeaker in bridge mode, page 14. Each channel of the 559 Stereo Power Amplifier provides twin outputs for bi-wiring. This allows separate connections to be made to the bass/mid and tweeter units on speakers that allow bi-wiring, for optimum sound quality. Alternatively, for loudspeakers providing a single pair of inputs, either of the output terminals can be used. 10 Standby Once set up, the stereo power amplifier can be left in standby as it consumes negligible power in this mode. To bring the amplifier out of standby press the button on the front panel. Alternatively, the 559 can be brought out of standby automatically using the TRIGGER INPUT; see below. If you are not going to use the stereo power amplifier for a period of several days you should switch the unit completely off, at the back panel, and disconnect it from the AC power supply. Setting up the stereo power amplifier Trigger input The TRIGGER INPUT can be used to bring the stereo power amplifier out of standby by applying a signal from a control unit. The trigger input should be an AC or DC signal of between 5 and 30V. Suitable trigger signals are provided by the Meridian 561, 562, 800, and 861. 11 Connecting a source To connect to a stereo preamplifier (eg Meridian 501) 559 Stereo Power Amplifier UNBALANCED To connect to each channel of a 568 Digital Surround Processor 559 Stereo Power Amplifier 568 Digital Surround Processor REAR-L RIGHT C LEFT REAR-R BALANCED 501 Analogue Controller OUTPUT OFF ON 2 x 559 Stereo Power Amplifiers Setting up the stereo power amplifier Switch the BRIDGE MODE switch to the OFF position. Three 559 Stereo Power Amplifiers can be used in bridge mode Connect the sockets marked UNBALANCED on the back panel of the stereo power amplifier to the outputs from your preamplifier. Switch the INPUT SELECTOR switches to the UNBALANCED position. You should either use a twin-screened audio cable, or a pair of single-screened audio cables. These cables can have a considerable effect on the quality of the sound, and you are advised to seek your dealer's advice on the best type of cables for your system. Connect the LEFT, RIGHT, and CENTRE balanced outputs from the 568 to the BRIDGE MODE inputs on the 559. Switch the INPUT SELECTOR switches to BALANCED. [. . . ] In case of difficulty within the UK or USA please contact the appropriate sales and service address shown on page ii. Outside the UK, local warranty liability is restricted to equipment In case of difficulty outside the UK or USA, contact the importing agent for the territory. A list of Meridian agents abroad is available from Meridian Audio. Troubleshooting Guarantee The 559 Stereo Power Amplifier is guaranteed against defects in material and workmanship for two years from the date of purchase. subject to misuse, accident, or negligence, or has been tampered with or modified in any way without the written authorisation of Meridian Audio Limited. Attempted servicing by unauthorised people may also invalidate this guarantee. [. . . ]