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Фрагмент инструкции
It provides outputs for a pair of loudspeakers and for headphones, and low level signals suitable for recording on to cassette and open reel tape. Additionally, in the A60AP+, the pre and power amplifier sections may be split to permit more complex systems (e.g. using ambisonics) to be assembled. Although designed for simplicity of operation the A60+ has comprehensive tone control facilities which enable good results to be obtained with a wide variety of programme material. Please study the manual carefully to ensure that you get the best results from your amplifier. Remember your dealer is there to help you. He has full technical and service information for all A&R Cambridge products and considerable experience of their use in a variety of systems. If, however, he is unable to answer your query then do not hesitate to contact us directly. Installing and using your A60 + Back panel connections A60AP+ |AP tuner and | Model only I socket C.D. inputs heat sink tape tuner | compact disc disc -1- input sockets ground terminal mains cable inlet Mains supply The amplifier is normally set up for use with a nominal 240 volt 50/60 Hz supply. It can be modified for a nominal 220 or 120 volt supply by your dealer or by the manufacturer. The mains lead should be terminated with a three pin (earthed) plug fitted with a five amp fuse. A 1 amp anti-surge mains fuse is fitted internally. It is recommended that the supply to the A60 be disconnected when the amplifier is not in use. UNDER NO CIRCUMSTANCES SHOULD THE AMPLIFIER COVER BE REMOVED UNLESS THE SUPPLY IS DISCONNECTED AT THE WALL SOCKET. Do not put excessive strain on the mains cable fixing either at the amplifier or at the plug. Loudspeakers The outputs are suitable for driving loudspeakers of 8 ohms nominal impedance or higher. “4-8 ohm” loudspeakers, when marked as such, may also be used. “4 ohm” loudspeakers may be used if care is taken not to operate at very high levels. The loudspeaker terminals, will accept either wires or 4mm plugs. The upper set of three terminals is for the left hand speaker, and the lower set for the right hand speaker. One side of your speaker (normally the - side) should be connected to the black terminal; the other (the + side) may be connected either to the red (direct) or to the white (switched) terminal. When the “direct” output is used loudspeakers and headphones may be used together; when the “switched” output is used, insertion of a jack plug into the headphones socket will automatically mute the loudspeakers. The A60+ is unconditionally stable and suitable for use with all types of loudspeaker leads, including the “high definition” types. Heat sink The heat produced by the amplifier is dissipated into the air by the heat sink, which will, along with the surrounding panel, become warm while the amplifier is on. The whole back panel may become quite hot if the amplifier is run near full power. THIS IS PERFECTLY NORMAL. However, if it becomes too hot to touch, switch off the amplifier at once and consult your dealer. 2 Disc input The output lead from your turntable should be plugged into the disc input sockets. To prevent hum pick-up in this very sensitive input, the cable must be screened and kept well away from mains wiring. If the turntable has a separate earthing lead connected this should be attached firmly to the amplifier’s ground terminal. The disc input is normally suited to moving magnet or “high output” moving coil cartridges. If a “low output” moving coil cartridge is to be used an additional internal plug-in pre-amplifier, the MC60, must be fitted (see page 9). The disc input impedance can be user adjusted over a wide range by fitting the (optional) ULM/M or ULM/C plug-in loading modules for moving magnet and moving coil cartridges respectively. However, most cartridges will perform satisfactorily without any loading module fitted (see page 9 for further details of cartridge matching). Tuner input The tuner input is suitable for use with almost any AM or FM tuner or radio. C.D. input/auxiliary output The C.D. (Compact Disc) input will accept any other signal, but is particularly suitable for use with a Compact Disc player. This socket also provides an output for recording onto a second cassette or reel to reel tape recorder (see page 6). There is no C.D. socket on the A60AP+ as it is replaced by the “AP” socket (see below). The C.D. input is retained and is accessible via the spare pins of the tuner socket (see page 7). The auxiliary recording output is not available on the A60AP+. AP socket (pre-amplifier output/power amplifier input - A60AP+ model only) The A6QAP+ has the facility for the user to split the pre and power amplifiers into separate units. This allows signal processors (e.g. graphic equalisers) to be inserted into the signal path or more complex systems such as ambisonic (surround sound) systems to be built up. When the pre/power amplifier split facility is not require...
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