User manual ADCOM GFA-7500

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Manual abstract: user guide ADCOM GFA-7500

Detailed instructions for use are in the User's Guide.

[. . . ] 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. [. . . ] 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. These will give the most contact area insuring long-term reliability. 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-6006/02 Owner's Manual | 7 Description of Unit: Front Panel [1] On/Standby/Vacation This LED monitors the status of operation of the amplifier. The LED will glow amber whenever the rear panel Power/ Vacation switch is in the OFF (powered down with only minimal circuitry energized) or AUTO position (amplifier is in the standby mode). When powered up (from AUTO) using the 3-30V AC/DC triggering or signal sensing feature, the LED will change to red, changing back to amber when there is no longer signal present or the 3-30V AC/DC triggering is not energized. The LED will glow red whenever the rear panel power switch is in the ON and the GFA-6006/6002 is energized. The Power LED indicates that there is AC voltage being fed to the amplifier, but it does not signify that the entire amplifier's circuits are in operation. this would indicate that the thermostat within the transformer has opened. Once the temperature within the transformer decreases to a normal level, the thermostat will reset itself automatically and normal operation will resume. On the GFA-7500, bridged mono input is channel 1. For "daisy-chaining" the corresponding outputs for these channels are active. are effective (see BRIDGED OPERATION for more details). [7] Amplifier Outputs The GFA-6006/6002'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-6006/6002, the positive terminal is color coded RED ADCOM GFA-6006/02 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. Use a small blade screwdriver to adjust. In balanced operation only the input adjustments for channels 1, 3, and 5 (GFA-6006) or channel 1 (GFA-7500) and labeled "+, " and the negative is color coded BLACK and labeled "-". [. . . ] Limited Five Year Warranty (Home, Non-Commercial Use Only) ADCOM warrants this product against defects in materials or workmanship for a period of five (5) years after the date of original retail purchase from an ADCOM authorized dealer. During this period, ADCOM will repair or replace a defective product or part, at our option, with a new or refurbished product or part without charge to you, as long as you follow the procedures listed below. ADCOM GFA-6006/02 Owner's Manual | 13 GFA-7500 Specifications Power Rating (To IEC/CEA-490A Requirements) 70 Watts continuous average power into 8 ohms at any frequency between 20Hz and 20kHz with all channels driven at less than 1. 0% THD. 100 Watts continuous average power into 4 ohms at any frequency between 20Hz and 20kHz with all channels driven at less than 1. 0% THD. Bridged Power: 175 Watts continuous average power (one channel) into 8 ohms at any frequency between 20Hz and 20kHz with at less than 1. 0% THD. [. . . ]

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