User manual ADCOM GFA-7605

[. . . ] OWNER'S MANUAL GFA-7605 & GFA-7607 Multichannel High-Current Power Amplifiers WELCOME Dear fellow ADCOM product owner, Welcome to the ADCOM family!For more than twenty years, ADCOM products have delivered excellent performance and value for customers around the world. Our products are designed by our experienced and demanding engineering team, built to the highest standards in our factory, and sold and serviced through dealers, custom installers, and other retailers whose primary goal is your complete satisfaction. We know you are anxious to hear your new amplifier in action, but please take a few minutes to read this owner's manual before connecting the amplifier to your system. [. . . ] You will not experience difficulties even with these very low impedance loads unless you demand excessively high volumes levels from your system. It is not recommended that you run additional sets of speakers to the GFA-7605/7607. (If you choose to add remote speakers in another room, it is strongly suggested that a switching system to disconnect the non-home-theater speakers be incorporated when the surround sound, home theater mode is in operation). A device such as the ADCOM GFS-3 or GFS-6 Speaker Selector is strongly recommended. A Speaker Selector enables you to maintain good sonic integrity while giving you the flexibility to add speakers throughout your house. It is suggested that for all the channels follow this chart for speaker lengths and wire 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. up to 24 feet AWGI6 up to 36 feet AWGI4 up to 58 feet AWGI2 7 GFA-7607 REAR PANEL (1) (3) (4) (2) (5) GFA-7607 FRONT PANEL LF distortion alert > thermal protection > C RF RS RB LB LS G F A 7607 (6) (7) (8) (9) (1) Input Jacks (2) Output Binding Posts (3) I2V DC Trigger (4) AC Fuse (5) AC Power Cord 8 (6) On/Off Switch (7) Power LED (8) Thermal Protection LEDs (9) Distortion Alert LEDs DESCRIPTION OF UNIT: REAR PANEL (4) AC Fuse (1) Inputs The audio inputs for the GFA-7605 and GFA-7607 are through high-quality, gold-plated RCA jacks to minimize high-frequency losses, noise, etc. They will accept standard RCA-type plugs, one for each of the channels. To insure that the performance designed into the amplifier is preserved, you should use the highest quality audio cables possible. There are many cables which are color-coded and specifically designed for this application. Your ADCOM dealer can help select the best cable for your needs. (See CONNECTING THE GFA-7605/7607 for more information). The AC Fuse protects the electronic circuits of the GFA7605/7607. This fuse, normally, will fail only if there is an overload within the GFA-7605/7607. It may, however, fail if the amplifier attempts to deliver very high power into very low-impedance loudspeakers. In either case, BE SURE TO REPLACE THE AC Fuse ONLY WITH AN EXACT REPLACEMENT FUSE. The proper fuse values are: GFA-7605 for 120 volt operation -- Fuse Rating: 13 Amp GFA-7605 for 230 volt operation -- Fuse Rating: 6. 5 Amp GFA-7607 for 120 volt operation -- Fuse Rating: 15 Amp GFA-7607 for 230 volt operation -- Fuse Rating: 8 Amp Before attempting to replace a failed fuse, be certain to unplug the AC Power Cord from the AC wall outlet to prevent possible electrical shock. Replace the AC Fuse only with one identical in type and rating as printed on the rear panel. Failure to observe this precaution may cause serious damage to the amplifier circuits, may create a hazard fire, and may void the warranty. If the Power LED (7) does not glow, it may be an indication that the AC fuse has blown. If you are using the 12V DC Triggering feature it may be possible that there is a problem with that connection. To determine if the problem is caused by a malfunction in the 12V DC system, remove the small plug inserted into the I2V DC Triggering jack. Press the front panel power switch to turn off the amp, and immediately re-press the power switch. If the problem is caused by the 12V DC triggering circuit the amp will turn on and the LED will glow. [. . . ] If the front panel, top or sides become dusty or fingerprinted, they can be cleaned with a soft lint-free cloth, slightly dampened with a very mild detergent solution or glass cleaner. Do not spray or pour liquids of any kind directly onto the GFA-7605/7607. SERVICING ADCOM has a Technical Service Department to answer questions pertinent to the installation and operation of your unit. If your problem cannot be resolved through our combined efforts, we may refer you to an authorized repair agency, or authorize return of the unit to our factory. To aid us in directing you to a convenient service center, it would be helpful if you indicate which major city is accessible to your home. Please address mail inquires to: ADCOM Service 8551 East Anderson Drive, Suite 105 Scottsdale, Arizona 85255 USA Phone, Fax or Email inquires to: Voice: (480) 607-2277 Fax: (480) 348-9876 Monday through Friday 9:00 AM to 5:00 PM MST Email: service@adcom. com For Fax inquires, please include a return Fax number for the reply. When calling or writing about your GFA-7605/7607, be sure to note and refer to its serial number as well as the date of purchase and the dealer from whom it was purchased. [. . . ]