QSC GXD8 Power Amplifier


Lightweight, class-D professional power amplifier with DSP, 2 channels, 800 watts/ch at 8Ω, 1200 watts/ch at 4Ω, total power capacity of 4500 watts.


About this item



QSC GXD8 Power Amplifier Features

  • 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 in 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 parametric EQ, limiting, and delay.
  • E Series Entertainment System DSP Tunings are now available for GXD processing amplifiers:

             – Visit the GXD Firmware Updater to download and update

  • A large LCD display simplifies amplifier setup and indicates amp status.
  • Inputs: Parallel XLR and 1/4-inch 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.
Output power per channel
8Ω dynamic, both channels driven600 W1500 W
4Ω dynamic, both channels driven800 W2250 W
8Ω continuous, both channels driven400 W800 W
4Ω continuous, both channels driven600 W1200 W
Distortion (typical)
1 kHz at full rated power
< 1% THD
Signal to Noise
(A weighted, 20 Hz–20 kHz)
100 dB
Input Sensitivity1.2 Vrms, 3.9 Vrms
Maximum Voltage Gain33.5 dB36.5 dB
Output CircuitryClass D
Power Requirements1/8 power at 4Ω
– 100 V AC3.4 A6.2 A
– 120 V AC2.9 A5.6 A
– 230 V AC1.6 A3.2 A
Frequency Response
(20 Hz–20 kHz)
+0.7 dB, -0.8 dB
Dynamic Headroom (4Ω)1.25 dB2.73 dB
Damping Factor (8Ω)100
Input Impedance20 kΩ (balanced), 10 kΩ (unbalanced)
Maximum Input Level+23.5 dBu
Input Connectors
(each channel)
3-pin XLR/F / 1/4-inch 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 ProtectionShort circuit, open circuit, thermal, RF protection
Load protected against DC faults
Front Panel Controls and Indicators2 × 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-inch × 1.0-inch, 256 × 128 pixel LCD
DSP FunctionsHigh-pass filter, 4th-order Linkwitz-Riley,
adjustable frequency 20 Hz to 4 kHz
A 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, aggressiveness, and impedance selection
Delay 50 msec max.
Product Dimensions (H×W×D)89 × 483 × 259 mm
3.5 (2 RU) × 19 × 10.2 in
Carton Dimensions (H×W×D)600 × 370 × 153 mm
23.6 × 14.6 × 6 in
Net Weight5.1 kg / 11.3 lb6 kg / 13.2 lb
Shipping Weight7 kg / 15.4 lb7.9 kg / 17.4 lb
Agency ApprovalsUL, CE, RoHS/WEEE compliant
Carton and ContentsPower cable and quick start guide


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