Adcom GFA-7400 User Manual

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 from which it was bought. 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 inquiries to:
ADCOM Service Corporation
11 Elkins Road
East Brunswick, NJ 08816
Phone, Fax or E-mail inquiries to:
Voice: 732-390-1130
Fax: 732-390-5657
Monday through Friday
9:00AM to 5:00PM EST
E-mail: Service@adcom.com
New Location and Telephone Numbers as of Spring 1998
ADCOM Service Corporation Voice: 732-683-2356
10 Timber Lane Fax: 732-683-2358
Marlboro, NJ 07746
USA
UNDER NO CIRCUMSTANCES SHOULD YOUR UNIT BE SHIPPED TO OUR
FACTORY WITHOUT PRIOR AUTHORIZATION, OR PACKED IN OTHER
THAN ITS ORIGINAL CARTON AND FILLERS.
For fax inquires, please include a return fax or voice number for the reply. When calling or
writing about your GFA-7400/7300, 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. In the event the unit must be
returned to our factory for service, you will be instructed on the proper procedure when you call or
write for a Return Authorization. For warranty coverage, a copy of the original proof of purchase is
required. If you have no original copy, please contact your dealer to obtain a duplicate copy.
If the original shipping carton and its fillers have been lost, discarded, or damaged, a
duplicate carton may be obtained from our Service Department for a nominal charge.
Always Ship PREPAID VIA UNITED PARCEL SERVICE (UPS) OR OTHER APPROVED
CARRIER. DO NOT SHIP VIA PARCEL POST, since the packing was not designed to withstand
rough Parcel Post handling. FREIGHT COLLECT SHIPMENTS CAN NOT BE ACCEPTED
UNDER ANY CIRCUMSTANCES.
16

Adcom GFA-7400 Specifications

Power

continuous power per channel into 8 ohms	100 watts
continuous power per channel into 4 ohms	150 watts
power consumption quiescent	96 VA
maximum power consumption	1440 VA
power consumption at 100 watts into 8 ohms	1165 VA
power supply voltage	115 VAC - 50/60 Hz

Distortion

IM distortion SMPTE at 8 ohms	≤ 0.075%
IM distortion SMPTE at 4 ohms	≤ 0.075%
IM distortion CCIF at 8 ohms	≤ 0.025%
IM distortion CCIF at 4 ohms	≤ 0.025%
THD + noise at 100 watts into 8 ohms at 20Hz	0.0012%
THD + noise at 100 watts into 8 ohms at 1kHz	0.0012%
THD + noise at 100 watts into 8 ohms at 10kHz	0.02%
THD + noise at 100 watts into 8 ohms at 20kHz	0.025%
THD + noise at 150 watts into 4 ohms at 20Hz	0.025%
THD + noise at 150 watts into 4 ohms at 1kHz	0.025%
THD + noise at 150 watts into 4 ohms at 10kHz	0.035%
THD + noise at 150 watts into 4 ohms at 20kHz	0.045%

Performance

frequency response at 1 watt into 8 ohms	+0, -0.25 dB
power bandwidth	1.5 Hz to 65 kHz
dynamic headroom into 4 ohms	2.5 dB
signal to noise ratio	≥ 110 dB
gain	29 dB
input sensitivity for 1 watt	0.1 volts
input sensitivity for 100 watts	1.0 volts
input impedance	50 kΩ
damping factor	≥ 400
rise time	4.5 µS

Weight and Dimensions

chassis dimensions	5” (127mm) x 17” (432mm) x 14” (355.6mm)
maximum dimensions	5 3/4” (146mm) x 17” (432mm) x 15” (381mm)
weight	42 lb. (19.1 kg)
packed weight	48 lb. (22.8 kg)