Adcom GFA-7705 User Manual

GFA-7705/07 Features
• 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 and internal power supplies for easy in-field upgradeability
from 5 to 7 channel configuration.
• Independent thermal-overload and distortion LEDs for all 5 (to 7) channels.
• S.A.F E.® Circuit: Self Annealing Fuse Equipped—automatic reset protection circuit in the event of
speaker or speaker wire dead-short.
• High quality, gold-plated 5-way binding posts.
• High quality, gold-plated RCA jacks.
• Large independent, internal heatsinks for greater cooling capability of output devices.
• Convenient 12 VDC power ON/OFF triggering.
• Heavy gauge, anodized aluminum front panel.
• Cooling vents for greater efficiency and cooler operation while driving low impedance loads.
Table of Contents
Introduction
Warranty Information. 4
Description of Unit— 20-Amp Device Notification .4
Rear Panel..
Front Panel..
Installation & Hookup
Unpacking the GFA-7705/07. 9
Placement of the GFA-7705/07.9
Quick Connection Diagram. 1 0
Connecting the GFA-7705/07. H
Caring for your GFA-7705/07. 12
Troubleshooting
Resolving Problems. 1 3
Service Information... 1 4
Specifications. 1 5
3

Adcom GFA-7705 Specifications

Power

power rating into 8 ohms	200 Watts continuous average power per channel
power rating into 4 ohms	300 Watts continuous average power per channel
power consumption idle 7 channel	120W

Audio Performance

frequency response at 1 watt into 8 ohms	+0, -0.22dB
power bandwidth	3 Hz to 130kHz
dynamic headroom into 4 ohms	1.90 dB

Electrical Specifications

input sensitivity for 1 watt output	0.1 volts
input sensitivity for 200 watts output	1.40 volts
damping factor (20Hz to 20kHz)	800

Dimensions and Weight

chassis dimensions	8.5” (216mm) x 17” (432mm) x 17.5” (444.5mm)
maximum dimensions	9 3/8” (238mm) x 17” (432mm) x 18.5” (470mm)
unit weight GFA-7707	35.5 kg