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GX Series
GX Series amplifiers are ideal for professional entertainers who
require maximum performance and portability on a limited budget.
QSC designers, headed by Pat Quilter, have optimised output and
appearance while reducing raw material cost and weight. It's all
here - dramatic styling, easy hook-up and adjustments, excellent
audio quality and QSC reliability.
Power
GX amplifiers deliver just the right amount of power to the most
popular speakers used by entertainers. Typically, loudspeaker
manufacturers recommend an amplifier with power output equal to the
speaker's Program (Music) Power rating or two times (2 x) the
Continuous (RMS) Power rating. The GX3 is ideal for speakers in the
300 watt (Program) range.
Thermal Efficiency
The GX3 uses the latest evolution of the QSC Grounded Collector
output system, for optimum cooling of the critical power
transistors. A true Class B biasing system combines maximum thermal
efficiency with excellent audio performance. The amplifier uses
premium toroidal power transformers for reliable mid-weight
performance. A variable-speed fan moves air crosswise through the
amplifier, drawing cool air in over the power transformer, through
the fan, and then over the heat sink. This keeps the transformer
cool and allows a full size heat sink to fit in a down-sized
chassis. As always, the amplifiers are fully protected from the
usual hazards of the trade, ensuring stable performance and long
life.
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.
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 (Ch 2). The front
panel gain controls balance the sub and top box, while GuardRail?
optimises peak power into the sub and top individually, for greater
musical impact and dynamic range.
Features
- Power levels matched to the most popular speakers used by
entertainers
- Optimised for maximum real-world headroom into 4- and 8-ohm
speaker systems
- Inputs: XLR, 1/4" TRS and phono input connectors for
compatibility with any source
- Outputs: Speakon? combo accepts 1/4" (TS) plugs or Speakon 2-
and 4-pole plugs (connects 2 poles only). Binding posts support all
other speaker wiring systems
- Minimum depth chassis (10.1" / 257 mm) fits in compact,
inexpensive effects racks
- Lightweight - less than 26 lb (12.5 kg)
- Detented gain controls for precise setting and matching of
sensitivity
- GuardRail? automatically protects the amplifier and
loudspeakers from damage due to temperature rise or overdrive
without shutting down the show
- Front panel LEDs monitor power, signal, and clipping
- Subwoofer/satellite crossover built-in
Output Power Per Channel
- 8 ohm / both channels driven / 1 kHz: 300 W
- 8 ohm / single channel driven / 1 kHz: 350 W
- 4 ohm / both channels driven / 1 kHz: 425 W
- 4 ohm / single channel driven / 1 kHz: 500 W
Specifications
- Distortion (1dB below rated power, 1 kHz): 8 ohms: less
than 0.02 4 ohms: less than 0.05
- Signal to Noise (20 Hz - 20 kHz): 100 dB
- Input Sensitivity: 1.2 Vrms
- Voltage Gain (8 ohm): 32.2 dB
- Output Circuitry: Class B
- Frequency Response: 20 Hz - 20 kHz, +0, 1 dB
- Dynamic Headroom (4 ohm): 2 dB
- Input Impedance (ohms): Greater than 20k (balanced)
- Maximum Input Level: +24 dB (16 Vrms)
- Input Connectors (each channel): 3-pin XLR and 1/4" TRS,
balanced, parallel Phono, unbalanced
- Output Connectors (each channel): Speakon, 1/4", Binding
Posts
- Amplifier and Load Protection: Short circuit, open
circuit, thermal, RF protection, Load protected against DC
faults
- Front Panel Controls and Indicators: Gain controls, 21
detents, Red Clip LEDs, proportional, 0.1 THD threshold, Green
Signal LEDs, threshold -35 dB, Blue Power LED, AC on
- Rear Panel Controls: Full Range / Crossover switch, 100
Hz, 3rd order LP (sub), 2nd order HP (top)
- Dimensions (HWD): 3.5" (2RU) x 19" x 10.1" (89 mm x 483
mm x 257 mm)
- Weight Net: 27 lb (12.1 kg), Shipping: 31 lb (14.1
kg)
- Agency Approvals: UL, CE, RoHS/WEEE Compliant
AC Current and Heating, 120 VAC(multiply current by 0.5 for 230
VAC) |
GX3 |
---|
Operating Condition |
AC amps |
BTU/hour |
Idle |
0.2 |
44 |
8 + 8 ohms, 1/8 power 1 |
4.1 |
904 |
8 + 8 ohms, 1/3 power 2 |
6.1 |
1160 |
8 + 8 ohms, full power 3 |
9.75 |
1109 |
4 + 4 ohms, 1/8 power 1 |
6.3 |
1515 |
4 + 4 ohms, 1/3 power 2 |
9.4 |
2105 |
4 + 4 ohms, full power 3 |
15.0 |
2297 |
|
1 1/8 power represents typical maximum operating
conditions, 2 1/3 power represents overdriven program levels, 3
Full power is breaker limited to short periods For 230 V, multiply
AC current by 0.5 For 100 V, multiply AC current by 1.25 |