User manual ADCOM GFA-7707

[. . . ] It is particularly important that you connect your power amplifier to your preamplifier while they are unplugged and your other equipment is turned off. This will protect your equipment from potential short circuits that may occur during installation. In addition, it is important that you allow for adequate ventilation around your power amplifier and other equipment, since excessive heat buildup can shorten the life of any electronic product, including the power amplifier. Once you have correctly connected your new power amplifier to your other components, you should be able to enjoy many trouble-free years of performance. [. . . ] We do not recommend that you run multiple sets of speakers to each speaker output on the GFA-6002/6006. Instead, we recommend that you use a multiple speaker selector such as the ADCOM GFS-300 or GFS-600. A speaker selector enables you to maintain good sonic integrity while giving you the flexibility to add speakers throughout your house and maintain proper impedance levels to help prevent over heating of the amplifier. Finally, we suggest that you follow this chart for speaker wire lengths and gauges. If longer runs are needed, it is best to consult with your ADCOM Dealer to maximize the performance of your system with your exact conditions. Connecting the GFA-6002 and GFA-7707 When connecting the amplifier to the loudspeaker, it is vital to maintain proper polarity (positive to positive, negative to negative). On the GFA6002/6006, the positive terminal is color coded RED and labeled "+, " and the negative is color coded BLACK and labeled "-". The positive terminal on the speaker will be color coded RED, or will be labeled "+, " "pos, " "positive, " "8 ohms" or "4 ohms. " The negative terminal on the speaker will be color coded BLACK, or will be labeled "-, " "neg, " "negative, " "C, " "Common, " "G, " or "ground. " We recommend that your speaker cables be terminated with "U" type spade connectors. The spade connector should have a maximum width of 0. 57 inches and an opening width of no less than 0. 25". To properly connect the speaker cable to the binding posts, turn the insulated head of the binding post clockwise until the wire or connector is firmly secured. Finger pressure is sufficient and you should not use pliers or other tools which could damage or over-tighten the binding-post assembly. The binding posts have been designed in such a way that finger pressure is all that is required to cause a "pinching" action among the different metal surfaces to ensure proper connection. up to 24 feet -- AWGI6 up to 36 feet -- AWGI4 up to 58 feet -- AWGI2 ADCOM GFA-7707/02 Owner's Manual | 7 Description of Unit: Front Panel [1] On/Standby/Vacation This LED monitors the status of operation of the amplifier. To insure that the performance designed into the amplifier is preserved, you should use the highest quality audio cables possible. The GFA-6002 and 6006 feature inputs and outputs for each channel to allow "daisy-chaining" of channels or additional amplifiers in an installation. To direct signal from one channel to another, connect an appropriate cable (RCA to RCA, male to male) from the output of one channel to the input of the desired channel. In bridged operation (see Bridged Operation) only the Bridged Mono Input is to be used. For "daisy-chaining" the corresponding outputs for these channels are active. are effective (see BRIDGED OPERATION for more details). [7] Amplifier Outputs The GFA-7707/6002's connections to the loudspeakers are made through high-grade, 5-way, binding post terminals. There are two terminals for each speaker, which are colored RED for the positive (+) output and BLACK for the negative (-) output. The binding posts will accept a variety of connector types; the most secure and prevalent of these is the "U"-type spade connectors (at least 0. 25" wide and maximum width of 0. 57"). The terminal will also accept bare wire (up to AWG10) and "banana" type plugs (single or dual). In connecting the amplifier to the loudspeaker, it is vital to maintain proper polarity (positive to positive, negative to negative) in stereo operation. On the GFA-7707/6002, the positive terminal is color coded RED ADCOM GFA-7707/02 Owner's Manual | 9 [6] Input Level Adjustment Each channel has an input level adjustment. The purpose of this adjustment is to balance levels in installations where physical circumstances may create a large difference in volume. Turn the level control to the fully clockwise position for maximum sensitivity; turning the control counter clockwise reduces sensitivity. [. . . ] Improper shipment of the product will void your warranty coverage. Your Responsibilities The above warranties are subject to the following conditions: (1) You must retain and present your dated invoice or bill of sale to provide proof of original purchase from an ADCOM Authorized Dealer and coverage under the warranty period. (2) You must notify us within ten (10) days after you discover a defective product or part. (3) All warranty servicing of this product must be done by ADCOM or an authorized ADCOM Service Center. (4) This warranty is only valid if this product has been purchased and used in the United States. [. . . ]