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QSC GDX4 - Light weight, classD professional power amplifier

QSC GDX4 - Light weight, classD professional power amplifier

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List Price: $599.99
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Availability: Usually Ships in 1 to 2 Business Days
Product Code : GXD4


QSC GDX4 - Light weight, classD professional power amplifier


  • High peak output power with up to 1600 watts from the GXD 4 and a whopping 4500 Watts from the GXD 8.
  • Power levels matched to the most popular loudspeakers and optimized for maximum real-world headroom into 4Ω and 8Ω speaker systems.
  • Class D output stage with a universal power supply for high performance and efficiency.
  • Extensive and powerful loudspeaker processing built in. Includes high and low-pass filters, 4-band parameteric EQ, limiting, and delay.
  • Large LCD display simplifies amplifier setup and indicates amp status.
  • Inputs: Parallel XLR and 1/4” TRS connectors for compatibility with any source while providing convenient loop-thru capability.
  • Precision rotary encoders for gain and DSP parameter control.
  • Outputs: Professional binding post and NL4 connectors (compatible with NL2) provide for mono and bi-amp speaker connections.
  • Digital limiting automatically protects the amplifier from damage due to temperature rise or overdrive.
  • Adjustable speaker protection to match your loudspeaker’s power and impedance.
  • Front panel LEDs indicate signal presence, input overload, and amplifier clipping.
8Ω dynamic, both channels driven
600 watts per channel

1500 watts per channel
4Ω dynamic, both channels driven 800 watts per channel 2250 watts per channel
8Ω continuous, both channels driven 400 watts per channel 800 watts per channel
4Ω continuous, both channels driven 600 watts per channel 1200 watts per channel
Distortion (typical)
1 kHz at full rated power
< 1% THD
Signal to Noise
(A weighted, 20 Hz–20 kHz)
100 dB
Input Sensitivity 1.2 Vrms, 3.9 Vrms
Maximum Voltage Gain 33.5 dB 36.5 dB
Output Circuitry Class D
Power Requirements 1/8 power at 4Ω
- 100 V AC 3.4 A 6.2 A
- 120 V AC 2.9 A 5.6 A
- 230 V AC 1.6 A 3.2 A
Frequency Response
(20 Hz–20 kHz)
+0.7 dB, -0.8 dB
Dynamic Headroom (4Ω) 1.25 dB 2.73 dB
Damping Factor (8Ω) 100
Input Impedance 20 kΩ (balanced), 10 kΩ (unbalanced)
Maximum Input Level +23.5 dBu
Input Connectors
(each channel)
3-pin XLR/F / 1/4" TRS, balanced
Output Connectors
(each channel)
NL4, binding posts
NL4 pinout:
• Channel A on 1+, 1-; Channel B on 2+, 2-
Channel B on 1+, 1-
Amplifier and Load Protection Short circuit, open circuit, thermal, RF protection
Load protected against DC faults
Front Panel Controls and Indicators 2 × Rotary Encoders
3 × Operational buttons (HOME, ENTER, EXIT)
2 × Green Signal LEDs indicate signal presence
2 × Red A/D Clip LEDs indicate input over-drive and/or amplifier current clipping
Blue Power LED ring indicates AC on
2.12" × 1.0", 256 × 128 pixel LCD
DSP Functions High-pass filter, 4th-order Linkwitz-Riley, adjustable frequency 20 Hz to 4 kHz
Low-pass filter, 4th-order Linkwitz-Riley, adjustable frequency 60 Hz to 4 kHz
4-band parametric EQ with variable frequency, gain, and bandwidth
Peak limiter with power, agressiveness, and impedance selection
Delay 50 msec max.
Dimensions (HWD) 3.5" (2 RU) × 19" × 10.2" (89 mm × 483 mm × 259 mm)
Weight (Net) 11.3 lb (5.1 kg) 13.2 lb (6.0 kg)
Weight - Shipping 15.4 lb (7.0 kg) 17.3 lb (7.8 kg)
Agency Approvals UL, CE, RoHS/WEEE compliant
Carton and Contents Power cable and quick start guide

All specifications are subject to change without notice.

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