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The GXD Series amplifiers are ideal for portable sound reinforcement applications and installations with demanding DSP requirements and flexibility at a cost effective price. This high performance line consists of two amplifiers, the GXD4 and GXD8, each providing enormous Class-D power in a lightweight and efficient package.  The universal switchmode power supply helps reduce the weight, increase efficiency, and ensures rock-solid continued operation even with poor power conditions.  The addition of on-board DSP processing with an easy-to-use interface offers powerful tools like Crossover and EQ filters, Delay, and Power Limiting that allow the user to configure the amplifier and maximize the performance of their loudspeakers.   The GXD Series amplifiers are engineered to meet any demanding application and provide excellent power and legendary QSC reliability, in an efficient, lightweight, and flexible package; bottom line, the GXD amplifiers provide outstanding value!

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    - 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-inchTRS 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.

    Technical Specification


      Output power per channel
    8Ω dynamic, both channels driven 600 W 1500 W
    4Ω dynamic, both channels driven 800 W 2250 W
    8Ω continuous, both channels driven 400 W 800 W
    4Ω continuous, both channels driven 600 W 1200 W
    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-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 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-inch × 1.0-inch, 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.
    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 Weight 5.1 kg / 11.3 lb 6 kg / 13.2 lb
    Shipping Weight 7 kg / 15.4 lb 7.9 kg / 17.4 lb
    Agency Approvals UL, CE, RoHS/WEEE compliant
    Carton and Contents Power cable and quick start guide



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