Page 3 - from 5 to 7 channel confi guration.; Introduction; Table of Contents
• Precision-matched devices used throughout the signal path.• Independent power supplies for each channel.• Fewer gain stages improve signal reproduction accuracy.• Custom toroidal power transformer provides better regulation and greater peak current capability.• ADCOM-Universal pre-prepped chassis ...
Page 5 - Rear Panel
Rear Panel Inputs (1) The audio inputs for the GFA-7705 and 7707 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 fi ve channels; Front L (Left), Center, Front R (Right), Surround L (Left), a...
Page 6 - WARNING
6 WARNING THERE ARE NO USER-SERVICEABLE PARTS OR FUSES INSIDE THE GFA-7705/07. In the event that the amplifi er’s rear-panel circuit breaker fails to reset (opens again when power applied to unit and unit turned on) you must refer the amplifi er to ADCOM Factory Service or ADCOM Authorized Service C...
Page 7 - Front Panel
Front Panel On/Off Switch (5) The On/Off Switch controls power to the power transformer and circuits of the GFA-7705/07. Whenever the GFA-7705/07 is energized the Power LED (7) will glow. To turn the GFA-7705/07 on, press the push-button. It will remain in the “engaged” position while the unit is en...
Page 9 - Installation & Hookup; Quick Connections
9 WARNING Whenever connections to or from the GFA-7705/07 are being made, be certain that the AC On/Off Switch (5) of the amplifi er is in the OFF position, the AC Power Cord (4) of the amplifi er is disconnected from the AC wall outlet and that all associated components are turned off. Installation...
Page 13 - Troubleshooting; Resolving Problems; A special note on “hum”
Troubleshooting Resolving Problems Use the chart below to solve common situations that don’t require professional attention. If the steps stated in POSSIBLE SOLUTION do not resolve your problem, then please contact your ADCOM Dealer or call the ADCOM Customer Service Department. Any problems not cov...
Page 14 - Servicing; Please address mail inquires to:; ADCOM Service
Servicing ADCOM has a Technical Service Department to answer questions pertinent to the installation and operation of your unit. In the event of diffi culty, please contact us for prompt advice. Please have the following information readily at hand: the unit’s model and serial numbers, and dealer fr...
Page 15 - General
GFA-7700/7707 Specifi cations Power Rating (To EIA/CEA-490-A Requirements 200 Watts continuous average power per channel into 8 ohms at any frequency between 20Hz and 20kHz with all channels driven at less than 1% THD. 300 Watts continuous average power per channel into 4 ohms at any frequency betwe...