Two-Channel Amplifier: The QSC GX series GX3 two-channel
amplifier is rated a 300W x 2ch (8Ω), 425W x 2ch
(4Ω). or 200W x 2ch (2Ω).
A 2-ohm load is not recommended for high power use; to avoid protective
limiting, use only at low levels.
Balanced & Unbalanced Inputs: The QSC GX series amplifier
features a pair of balanced XLR inputs, a pair of 1/4" jacks that will accept
either balanced TRS or unbalanced TS inputs, and a pair of unbalanced RCA
jacks. The balanced inputs can be used for long or short runs, while the
unbalanced inputs should only be used for short runs. The XLR and TRS jacks are
connected internally and provide feed-thru to the other connector.
Speaker Outputs: The GX series amplifier is fitted with a
pair of Speakon combo speaker terminals and two pair of binding post speaker
terminals. The Speakon combo terminals will accept a 2-pole Speakon connector or
1/4" TS jack. The binding post terminals will accept bare wire, banana plugs,
pin-connectors and spade-connectors.
Independent Gains Controls: The GX series amplifier offers
independent gain controls for Ch 1 and Ch 2. The detented gain controls provide
precise setting and matching of sensitivity.
Subwoofer/Satellite Crossover: A subwoofer reduces strain on
the full-range speaker, allowing it to play louder, or letting a smaller speaker
do the same job. The GX Series supports this mode with a Crossover switch that
splits the full-range input entering Ch 1, sending 20 Hz -100 Hz to the sub (Ch
1) and 100 Hz - 20 kHz to the "top box" speaker (Ch 2). The front panel gain
controls balance the sub and top box, while GuardRail optimizes peak power into
the sub and top individually, for greater musical impact and dynamic range.
GuardRail optimizes peak power into the sub and top individually, for greater
musical impact and dynamic range.
GuardRail: GuardRail protection delivers full peak power
while preventing detrimental overloads. During excessive clipping, or extreme
overheating, GuardRail reduces gain just enough to preserve the integrity of the
music, protect the speakers and keep the audience excited, without
unprofessional distortion levels or shutdowns.
Front-Panel LEDs: Front panel LEDs monitor Power, Signal and
- Red: Red flashing LEDs indicate the amp is being
overdriven. Heavy overdrive triggers internal gain reduction, to reduce
overload distortion. Normal gain will resume after the signal level returns
- Green: The green LED starts flashing on soft signals
(-35 dB), and changes to steady green as the signal level increases.
- Blue: The blue Power LED indicates that the AC switch
is on, and the amp is receiving power. Within two seconds, it is ready to
Cooling Fan & Vents: The internal fan moves air through the
chassis and out of its front- and rear-panel vents to reduce temperature rise.
Keep vents clear. The fan speeds up in response to heavy use.
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