QSC GXD 4 - 2-Cannel 400W Professional Processing Power Amplifier

Special Price $499.99 Regular Price $599.99



-8Ω Power /Channel -400w
-4Ω Power /Channe 600w
-Max Total Peak Power 1600w

QSC GXD 4 - 2-Cannel 400W GXD Professional Processing Power Amplifier

QSC GXD 4 amplifiers are ideal for entertainment and production applications requiring performance and the convenience of integral signal processing. The hallmarks of the QSC brand – professional audio quality, engineering and manufacturing focused on long-term reliability - are all intrinsic to GXD. Add contemporary styling, multiple routing options, light weight, digital signal processing and advanced protection circuitry, and the GXD Series clearly…


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UPC (Universal Product Code) 00684284064899
MPN (manufacturer part number) GXD4
Condition New

• 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 & 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.




Stereo Mode - Watts per channel



8Ω dynamic, both channels driven


600 Watts


1500 Watts

4Ω dynamic, both channels driven

800 Watts

2250 Watts

8Ω continuous, both channels driven

400 Watts

800 Watts

4Ω continuous, both channels driven

600 Watts

1200 Watts

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


Voltage Gain (8Ω)

33.5 dB

33.5 dB

Output Circuitry

Class D

Class D

Power Requirements: 1/8 power at 4Ω

- 100 Vac

3.4 Amps

6.2 Amps

- 120 Vac

2.9 Amps

5.6 Amps

- 230 Vac

1.6 Amps

3.2 Amps

Frequency Response (20 Hz – 20 kHz)

+0.7 dB, -0.8 dB

Dynamic Headroom (4Ω)

1.25 dB

2.73 dB

Damping Factor


Input Impedance (Ω)

20k (balanced), 10k (unbalanced)

Maximum Input Level

+23.5 dBu

Input Connectors (each channel)

3-pin XLR/F / 1/4" TRS, balanced

Output Connectors (each channel)

NL4 (Channel 1 - 1+/-, Channel 2 - 2+/-), binding posts

Amplifier and Load Protection

Short circuit, open circuit, thermal, RF protection

Load protected against DC faults

Front Panel Controls and Indicators

2 x Rotary Encoders

3 x Operational buttons (HOME, ENTER, EXIT)

2 x Green Signal LEDs, indicate signal presence

2 x Red A/D Clip LEDs, indicate input over-drive and/or amplifier current clipping

Blue Power LED ring, AC on

2.12" x 1.0", 256 x 128 pixel LCD

DSP Functions

High Pass Filter, 4th order LR, adjustable Frequency 20 Hz to 4 kHz

Low Pass Filter, 4th order LR, adjustable Frequency 60 Hz to 4 kHz

4-band PEQ, with variable Frequency, Gain, and Bandwidth

Peak Limiter, with Power, Agressiveness, and Impedance selection

Delay 50 msec max.

Dimensions (HWD)

3.5" (2 RU) x 19" x 10.2" (89 mm x 483 mm x 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

Specs No
Producut Video No

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