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Home » Mixers & Power Amps

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QSC GX3 Professional Power Amplifier
QSC GX3 Professional Power Amplifier
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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 optimized output and appearance while reducing raw material cost and weight. It's all here – dramatic styling, easy hookup and adjustments, excellent audio quality and QSC reliability.

GX amplifiers deliver just the right amount of power to the most popular speakers used by entertainers. Most 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, and supplies maximum possible power to 4 ohm and 8 ohm loads.

Features:

  • Power levels matched to the most popular speakers used by entertainers
  • Optimized for maximum real-world headroom into 4 ohm 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-pole 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 30 lbs (13.5 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

Specifications:

8 ohms / 1 kHz (both channels driven)

300 W

8 ohms / 1 kHz (single channels driven)

350 W
4 ohms / 1 kHz (both channels driven)425 W
4 ohms / 1 kHz (single channels driven)500 W
Distortion (typical)
  20 Hz - 20 kHz, 1 dB below rated power
8 ohms: less than 0.05%
4 ohms: less than 0.1%
Signal to Noise (20 Hz - 20 kHz) 100 dB
Input Sensitivity1.2 Vrms
Voltage Gain (8 ohms) 32.2 dB
Output CircuitryClass B
Power Requirements (1/8 power, pink noise at 4 ohms, 120V) 6.3A
Frequency Response20 Hz - 20 kHz, +0, -1 dB
Dynamic Headroom (4 ohms) 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 ProtectionShort 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 ControlsFull Range / Crossover switch
100 Hz, 3rd order LP (sub), 2nd order HP (top)
DimensionsHeight: 3.5" (89 mm) 2RU
Width: 19" (483 mm)
Depth: 10.1" (257 mm)
WeightNet: 27 lbs (12.1 kg)
Shipping: 31 lbs (14.1 kg)
Agency Approvals UL, CE, RoHS/WEEE Compliant
AC Power Consumption
AC Current and Heating, 120 VAC
 GX3
Operating ConditionAC ampsBTU / hr
Idle0.244
8 + 8 ohms, 1/8 power 14.1904
8 + 8 ohms, 1/3 power 26.11160
8 + 8 ohms, full power 39.751109
4 + 4 ohms, 1/8 power 16.31515
4 + 4 ohms, 1/3 power 29.42105
4 + 4 ohms, full power 315.02297
1 1/8 power represents typical operating conditions
2 1/3 power represents peak 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

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List Price: $399.00
Price: $299.99

 
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