QSC GXD 8 Professional 4500W Power Amplifier with DSP

QSC GXD 8 Professional 4500W Power Amplifier with DSP


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The GDX 8 from QSC is a professional power amplifier designed for professional PA systems utilizing speakers with 4 and 8 ohm loads and a maximum output of 4500W. The GDX 8 employs a class D output stage with a universal power supply for high performance and efficiency, while keeping the unit lightweight at 13.2 lbs. The integrated DSP section includes High and Low-Pass filters (24 dB LR), 4-band parametric equalizer, signal alignment delay, and RMS/Peak speaker protection limiting.

The parallel XLR and 1/4″ TRS input connectors offer broad compatibility with convenient loop-through capabilities, while the professional binding posts and NL4 connector provide mono and bi-amped speaker connections. In addition to the limiting offers on the inputs and outputs, the GDX employs smart speaker protection by providing settings for the loudspeaker’s continuous output and impedance (4 ohm or 8 ohm). The GDX 8 ships with a standard IEC power cord.

  • High peak output power with up to 4500W
  • Power levels matched to popular loudspeakers and optimized for maximum headroom into 4ohm and 8-ohm speaker systems
  • Class-D output stage with a universal power supply for high performance and efficiency
  • Extensive built-in loudspeaker processing, includes high & low-pass filters, 4-band PEQ, 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
Power Amplifier
Number of Channels 2
Power Rating 8 Ohms:
1500 W Peak per Channel
800 W RMS per Channel
4 Ohms:
2250 W Peak per Channel
1200 W RMS per Channel
Amplifier Class Class-D
Protections DC Fault, Open Circuit, RF, Short Circuit, Thermal
Frequency Response 20 Hz to 20 kHz +0.7/-0.8 dB
Damping Factor 100
Input Sensitivity 1.2 Vrms
3.9 Vrms
Input Impedance 10 Kilohms (Unbalanced)
20 Kilohms (Balanced)
Max Gain 36.5 dB
Max Input Level +23.5 dBu
SNR 100 dBA
THD <1% (1 kHz, at Rated Power)
Signal Processing
Audio Delay Adjustable Up to 50 ms
EQ 4-Band Parametric EQ
Filters High-Pass:
20 Hz to 4 kHz, 24 dB/Octave Linkwitz-Riley
60 Hz to 4 kHz, 24 dB/Octave Linkwitz-Riley
Limiting Peak
I/O 2 x XLR 3-Pin Female Input
2 x 1/4″ TRS Balanced Input
2 x speakON NL4 Output
2 x Binding Post Pair Output
Current Consumption 100 VAC:
6.2 A
120 VAC:
5.6 A
230 VAC:
3.2 A
Display & Indicators 2 x Green LED (Signal)
2 x Red LED (Clip)
1 x Blue LED (Power)
1 x LCD
Certifications CE, RoHS, UL, WEEE, as per Manufacturer
Dimensions 3.5 x 19.0 x 10.2″ / 8.9 x 48.3 x 25.9 cm
Weight 13.2 lb / 6 kg


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