Qsc GXD4 Owner's Manual

TD-000450-00-A

Stereo Mode - watts per channel 

8: dynamic, both channels driven
4: dynamic, both channels driven 
8: continuous, both channels driven
4: continuous, both channels driven

600 watts

800 watts

400 watts

600 watts

1500 watts

2250 watts 

800 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 (8:)

33.5 dB

36.5 dB

Output Circuitry

Class D

Class D

Power Requirements: 1/8 power at 4: 

- 100 Vac

- 120 Vac

- 230 Vac

3.4 Amps

2.9 Amps

1.6 Amps

6.2 Amps

5.6 Amps

3.2 Amps

Frequency Response (20 Hz – 20 kHz)

+0.7 dB, -0.8 dB

Dynamic Headroom (4:)

1.25 dB

2.73 dB

Damping Factor

100

Input Impedance (:)

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, Aggressiveness, and Impedance selection

Delay 50 msec max.

Dimensions (HWD)

89 mm (2 RU) x 483 mm x 259 mm   (3.5" x 19" x 10.2")

Weight - Net

5.1 kg  (11.3 lb) 

6.0 kg (13.2 lb) 

Weight - Shipping

7.0 kg (15.4 lb)

7.8 kg (17.3 lb)

Agency Approvals

UL, CE, RoHS/WEEE compliant