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Operating Manual - GQX 3102, GQX 3101, and GQX 1502 Graphic Equalizer
120 VAC 50-60 Hz.
24 Watts
Ashly Audio Inc.
Rochester, NY
Made In USA
Model GQX-3101
1/2 Amp
CAUTION:
Disconnect power cord
before replacing fuse
Debrancher
avant d'ouvrir
ATTENTION:
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE
COVER. NO USER SERVICEABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED SERVICE PERSONNEL. TO REDUCE
THE RISK OF FIRE REPLACE ONLY WITH SAME TYPE FUSE.
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT
EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
AVIS:
RISQUE DE CHOC ELECTRIQUE -
NE PAS OUVRIR.
Furthermore, if common-mode voltage (such as
60Hz noise voltage) gets induced on the output signal
lines, the resulting 60Hz noise current into the servo-bal-
anced circuit would be insignificant because the common-
mode output impedance is high. A conventional active
balanced output would cause significant noise current
resulting in more noise.
Essentially, the servo-balanced output circuit
behaves like a transformer balanced output because it
maintains a constant level into balanced and unbalanced
lines with a low differential impedance and a high com-
mon-mode impedance. The servo-balanced output also
does not suffer from problems associated with output
transformers such as low-frequency distortion, suscepti-
bility to magnetic fields and poor frequency response.
3.3 Grounding
The terminal strip has two ground connections,
one for input ground and one for chassis ground. The
equalizer is shipped with a jumper strap connecting these
two grounds. Normally, this strap should be left in place
so the chassis and input grounds are connected. In a rack-
mount installation where the equalizer is connected to other
equipment with unbalanced inputs or outputs and the rack
itself provides a good electrical connection between the
equalizer chassis and the other equipment, it may be de-
sirable to remove this strap to isolate the input ground
from chassis ground and avoid a ground loop.
Unless you have such an installation and have a
hum problem you can’t solve by other means (ie: using
balanced input and output connections), leave the ground
jumper strap in place.
4. AC POWER
Your GQX equalizer should be connected to a
standard 3-wire grounded electrical outlet supplying 120
Volts, 50-60 Hz (some export models are wired for 240
Volts, and are labeled as such). To reduce the risk of
ground loop hum, connect all audio equipment to the same
electrical power source. Removal of the ground pin is both
unlawful and dangerous, as a potential shock hazard could
result.
This unit will perform normally within an AC
voltage range of 93 to 130 volts. Voltages less than this,
as found in “brown-out” conditions, will reduce headroom
and decrease power supply regulation. While this may
affect performance, the equalizer will continue to func-
tion during a brown-out. In the event of a blown fuse,
replace only with same type fuse. No user serviceable
parts are inside the chassis. Overall power consumption
is less than 25 watts.