Adcom GFA-7700 - Manuals - manualsarea.com

Page 3 - Table of Contents

• Precision-matched devices used throughout the signal path.• 120,000 µF of power supply-filter capacitance for greater reserve capacity.• Independent power supplies for each channel.• Fewer gain stages improve signal reproduction accuracy.• Custom toroidal power transformer provides better regulati...

Page 4 - Introduction; retain your original sales receipt as a proof of purchase.

Introduction Congratulations on your decision to purchase the GFA-7700, 5-channel power amplifier. The GFA-7700 integrates very well with any other home theater system, such as Dolby ProLogic™ or Dolby Digital™. You have made a wise choice that will reward you with exceptionally accurate and musical...

Page 5 - Description of Unit; Rear Panel; Connecting the; correct connections to all channels.

Description of Unit Rear Panel Inputs (1) The audio inputs for the GFA-7700 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 five channels; Front L (Left), Center, Front R (Right), Surround L...

Page 6 - WARNING; CREATE A FIRE HAZARD, AND MAY VOID THE WARRANTY.

6 12VDC Triggering (4a) The GFA-7700 is a very high power amplifier and as such must be directly connected to the wall outlet or an appropriate surge protector or AC line conditioner. It must never be connected to the “switched” outlets on the rear panel of a pre-amplifier. Usually this would mean t...

Page 7 - Front Panel; seconds to fully extinguish.

Front Panel On/Off Switch (6) The On/Off Switch controls power to the power transformer and circuits of the GFA-7700. Whenever the GFA-7700 is energized the Power LED (7) will glow. To turn the GFA-7700 on, press the push-button. It will remain in the “engaged” position while the unit is energized. ...

Page 8 - may be causing activation of this circuitry.

8 Distortion Alert LEDs (8) The Distortion Alert circuit is a unique ADCOM distortion detection system which reads all forms of non- linear distortion such as THD, IM, slew-induced, “clipping,” etc. The Distortion Alert LEDs will light when distortion reaches approximately 1% regardless of impedance...

Page 9 - Installation & Hookup; slots should be all that is required.; Quick Connections

9 Installation & Hookup Unpacking the GFA-7700 Before your new GFA-7700 left our factory, it was carefully inspected for physical imperfections and tested for all electrical parameters as a routine part of ADCOM’s systematic quality control. This, along with full operational and mechanical testi...

Page 12 - DO NOT SPRAY OR POUR LIQUIDS OF ANY KIND ON THE GFA-7700.

It is suggested that the three front channels follow this chart for speaker lengths and wire gauges. up to 24 feet ...................................... AWG16 up to 36 feet ...................................... AWG14 up to 58 feet ...................................... AWG12 Generally, for the two...

Page 13 - Troubleshooting; Resolving Problems

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 difficulty, please contact us for prompt advice. Please have the following information readily at hand: the unit’s model and serial numbers, and dealer fro...

Page 15 - watt into 8 ohms

GFA-7700 Specifications THD + Noise into 8 ohms (Typical) 20Hz ............................................................................................................... 0.006% 1kHz ............................................................................................................... 0...