User manual CAMBRIDGE AUDIO A1 AMPLIFIER

[. . . ] Amplifiers User’s manual ™ CONTENTS Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Rear panel connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Operating instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Connection Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Limited warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] This unit should be installed on a sturdy, level surface. Due to stray magnetic fields turntables should not be located nearby due to interference. The unit requires ventilation above and below. Do not situate it on a rug or other soft surface and do not obstruct the air inlet and outlet grilles on the underside and top cover. Do not place in an enclosed area such as a bookcase or in a cabinet. This unit must not be exposed to dripping or splashing water or other liquids. No objects filled with liquid, such as vases, shall be placed on the unit. In the event, switch off immediately, disconnect from the mains supply and contact your dealer for advice. Do not route the power cable so that it can be walked upon or damaged by other items near it. Electronic audio components have a running in period of around a week (if used several hours per day). This will allow the new components to settle down, the sonic properties will improve over this time. Do not plug a source component directly into a power amplifier unless it has a variable output level. Always turn a control amplifier on before a power amplifier. Never turn on a power amplifier when no control amplifier is connected. It is recommended that when bi-amping, the same type power amplifiers are used. If you do not intend to use this unit for a long period of time, switch it off and unplug it from the mains socket. To clean the unit, wipe it’s case with a moist, lint-free cloth. Do not use any cleaning fluids containing alcohol, ammonia or abrasives. Do not spray an aerosol at or near the amplifier. These units are not user serviceable, never attempt to repair, disassemble or reconstruct the unit if there seems to be a problem. A serious electric shock could result if this precautionary measure is ignored. In the event of a problem or failure, please contact your dealer. REAR PANEL CONNECTIONS Note: Some features may not apply to all models. [. . . ] It is advisable to turn the VOLUME control fully anti-clockwise before switching the amplifier on. Bi-wiring If your loudspeakers are equipped with two sets of terminals, then it is possible to connect them in the bi-wire configuration (see figures 3 & 5). Biwiring sends the bass and treble frequencies down separate speaker cables, resulting in a clearer, more focussed sound. Balance This control allows you to adjust the relative output levels of the left and right channels. In the central position the output from each channel is equal. This control only modifies the sound through your loudspeakers and the PRE-OUT sockets (where featured), it does not affect the signals sent through the TAPE OUT connections to your tape/MD recorder. Bi-amping If your amplifier is equipped with PRE-OUT sockets and your loudspeakers have two sets of terminals then it is possible to bi-amp your system using a further power amplifier (see figures 4, 6 & 7). [. . . ]