QSC GXD4 – 2-Channel 1600W Power Amplifier with DSP

Product Overview

The QSC GXD4 is a two-channel professional power amplifier with built-in DSP, designed for live sound, portable PA, and installed audio systems that need loudspeaker processing without an external unit. It produces up to 1,600 watts of peak output into 4- and 8-ohm loudspeaker loads from a Class-D output stage and universal power supply, in a lightweight 11.3-pound chassis. Onboard DSP — high- and low-pass filters, parametric EQ, delay, and limiting — makes the GXD4 a self-contained amplification and speaker-processing solution.

Product Description

The GXD4 pairs a Class-D output stage with a universal power supply for high efficiency and real-world headroom matched to popular loudspeakers. Its integrated DSP section includes 24 dB/octave Linkwitz-Riley high- and low-pass filters, a 4-band parametric equalizer, signal-alignment delay, and RMS/Peak loudspeaker-protection limiting, all set through a large front-panel LCD and precision rotary encoders. Parallel XLR and 1/4-inch TRS inputs provide loop-through to additional amplifiers, while professional binding-post and NL4 (NL2-compatible) outputs support mono and bi-amplified loudspeaker connections. Adjustable speaker protection lets you match the amplifier to your loudspeaker's continuous power and impedance. For a lower-power amplifier without DSP, see the QSC GX3.

Key Features

• Up to 1,600 W peak output — Power levels optimized for maximum real-world headroom into 4- and 8-ohm systems.
• Class-D output with universal power supply — High efficiency in a lightweight 11.3 lb chassis.
• Built-in loudspeaker DSP — 24 dB/oct high- and low-pass filters, 4-band parametric EQ, delay, and limiting.
• Large LCD display and rotary encoders — Simplifies amplifier setup and shows amplifier status.
• Parallel XLR and 1/4-inch TRS inputs — Broad source compatibility with convenient loop-through.
• Binding-post and NL4 outputs — Support mono and bi-amplified loudspeaker connections (NL2-compatible).
• Adjustable speaker protection — Match the amplifier to your loudspeaker's power and impedance; digital limiting guards against overdrive and overheating.

Typical Applications

• House of worship
• Multi-purpose room
• Auditorium
• Training room

Technical Specifications

Frequently Asked Questions

Do I need an external loudspeaker processor with the GXD4? No. The GXD4 has built-in DSP — crossover filters, parametric EQ, delay, and limiting — so it can process and protect loudspeakers without a separate unit.

Can it bi-amplify a loudspeaker? Yes. The NL4 and binding-post outputs support mono and bi-amplified connections, and the DSP provides the crossover filters.

What loads does it support? The GXD4 is optimized for 4-ohm and 8-ohm loudspeaker systems, with adjustable protection to match your loudspeaker's power and impedance.

What about warranty and support? Coverage follows QSC's published warranty terms. Contact Creation Networks support for setup or warranty assistance.