User manual ATLANTIC TECHNOLOGY A-2000 INSTRUCTION MANUAL

[. . . ] Instruction Manual Model A-2000 Seven Channel Amplifier 2 Warnings A-2000 7 Channel Amplifier Please Read First Installation Location To assure proper operation and to avoid the potential for safety hazards, place the unit on a firm and level surface capable of supporting 100 pounds or more. When placing the amplifier on a shelf, be certain that the shelf and any mounting hardware can support the weight of the amplifier and any additional items in the equipment rack, or on the shelf. When positioning the amplifier in its final location, make certain that it has adequate ventilation on all sides, as well as on the top and bottom. In particular, it is a good idea to provide at least two or three inches of room above the amplifier for air circulation. [. . . ] Remember to connect your negative and positive wires to the matching terminal on the speaker. NOTE: While most speaker manufacturers adhere to an industry convention of using red terminals for positive connections and black terminals for negative, some manufacturers may vary from this configuration. To assure proper phase connections, and optimal performance, consult the identification plate on your speaker terminals, or the speaker's manual to verify polarity. If you do not know the polarity of your speaker, consult the speaker's manufacturer for further information. Input Connections Connecting the amplifier to your source equipment is simple. Using high quality audio interconnect ("RCA")cables, match the output channel designations on the rear of your processor (or other source equipment) to the input jacks on the rear panel of your amplifier that have the same channel name (see page 4). When making these connections, make certain to gently, but firmly insert the plug into the jack. Loose connections can cause intermittent sound and may damage your speakers. The outer ring of the barrel assembly of some RCA plugs may be very tight, and it is important to assure a proper connection between the interconnection cable and the input jack. Gently twisting the connector as you insert it can often ensure good connections and full insertion. Speaker Connections To assure that the high quality signals produced by your amplifier are carried to your speakers without loss of clarity or resolution, we recommend that you use high quality speaker wire. Many brands of wire are available; the choice may be influenced by the distance between your speakers and the amplifier, the type of speakers you use, personal preferences, or other factors. Regardless of the brand or type of speaker wire selected, we recommend that you use a wire constructed of fine, multi-strand copper with a gauge of 14 or heavier. Remember that in specifying wire, the lower the gauge number, the heavier the cable will be. Wire with a gauge of 16 may be used for short runs of less than ten feet. We do not recommend that you use any wires with an AWG equivalent of 18 gauge or lighter, due to the power loss and degradation in performance that may occur. To connect the amplifier to your speakers a pair of multi-way binding posts is provided for each channel output. These posts will accept bare or tinned wire, pin connectors, spade lugs or "banana" type plugs, when they are permitted by local safety agencies. If bare wire is used for the connections, strip approximately 1/2 to 3/4 inch (20mm) of insulation from the end of each wire and carefully twist the strands of each conductor together. Be careful not to cut the individual strands or twist them off. Correct polarity connections (+ to +, - to -) are important to maintain proper speaker phasing. When speaker phasing is correct, all speakers move in and out together, preserving the imaging and bass response of the program material. Out-of-phase connections mean that some speaker cones will be moving in, while others move out. This will cause indistinct or confused imaging, and muddled and cloudy sounds and lack of bass response. To avoid incorrect phasing or polarity, be certain to use cable that has distinct markings, colors, stripes, wording, or grooves on each side of the 6 A-2000 Rear Panel Connections A-2000 7 Channel Amplifier A-2000 Rear Panel Connections Amplifier Operation Instruction Manual 7 Power Control Connections The Model A-2000 features a built-in remote turn-on system that will automatically switch the amplifier on when a connected device in the system is switched on. Amplifier Operation After all connections have been made you are ready for listening. First, with the processor's volume control all the way down, turn on the source components and processor in your system. It is always a good idea to turn on your amplifier LAST. [. . . ] If all potential sources of trouble check out OK, contact your dealer or us for further assistance and information. Service Information A-2000 contains no user serviceable parts. If you suspect a problem that may require service assistance, contact your Atlantic Technology dealer/installer or us or by phone at 781-762-6300. It is important that any repairs be carried out only by an authorized service agent. This will assure proper service and Troubleshooting Guide Problem Amplifier will not turn on Amplifier will not turn on Amplifier turns on, but no audio from one or more channels No audio from one or more channels Audio levels differ Audio plays, then cuts off Solutions Master Power Switch turned off (No power light LED) Turn on Master Power Switch Remote trigger cable not properly connected Verify connection of trigger cable at both ends Input plugs not connected to proper jack or are loose Check input connections Speakers not connected properly Check speaker connections at amp and speaker Improper settings or output levels from the processor or controller Check the settings on your preamp, processor or controller Amplifier shorted Check speaker connections for short circuit at amp and speaker A Few Words About Hum and Noise Instruction Manual 9 Potential Ground Loops in a Complex A/V System Suggestion 1 To determine if a cable TV connection is responsible for the hum, first turn all components off. Disconnect the cable TV feed to your system at the first place where it connects to your components. Alternatively, disconnect the cable TV wire (not the AC wire to the cable box, but the cable antenna wire) where it is connected at the wall outlet. Turn your system back on, and listen if the hum has disappeared. If removing the cable TV feed has eliminated the hum, you will need to insert a Ground Loop Isolator before reconnecting the cable TV feed, or contact your cable TV operator to see if they can better isolate your cable feed. [. . . ]