Chat
Contact us
Close contact box
Connect ID #
259 847 225 4
Connect ID #
259 847 225 4
Don't wait on hold. We'll call you back when it's your turn to talk with the next available .
Please enter your name  
Please enter your phone number  
Please enter a message  

Calls may be recorded for training and quality control purposes.

We are located in Virginia USA.

QSC GXD4

GXD Series power amplifier — 400W x 2 at 8 ohms (non-bridgeable)

Item # 907GXD4

No matter the type of venue, you need an amp that'll give you plenty of clean power for your music without breaking...

No matter the type of venue, you need an amp that'll give you plenty of clean power for your music without breaking...

In stock
$699.99

Other options

Need an expert?

Our Advisors know their stuff and love to help.

Hands-on research

We double check the details on each item.

Free lifetime tech support

Whenever you need a hand.

About the QSC GXD4

Dave Delamere

Power up your gig

No matter the type of venue, you need an amp that'll give you plenty of clean power for your music without breaking your back or your wallet. QSC designed the GXD Series amps to deliver ample power to work with the most widely used loudspeakers in the music industry. Its built-in DSP (digital signal processing) lets you adjust for any type of loudspeakers in your setup. Front-panel controls give you quick access to its gain levels and equalization, so you can adjust your stage settings on the fly.

Power up your gig

No matter the type of venue, you need an amp that'll give you plenty of clean power for your music without breaking your back or your wallet. QSC designed the GXD Series amps to deliver ample power to work with the most widely used loudspeakers in the music industry. Its built-in DSP (digital signal processing) lets you adjust for any type of loudspeakers in your setup. Front-panel controls give you quick access to its gain levels and equalization, so you can adjust your stage settings on the fly.

Strong and safe

The GXD4 2-channel amplifier pumps out 400 watts per channel at 8 ohms and 600 watts per channel at 4 ohms. Its class D design and digital limiter ensure that you get maximum output, while still protecting your speakers from being overdriven. This amp includes high- and low-pass crossovers, a 4-band parametric EQ, and signal alignment delay settings, along with 20 presets to give you a starting point to help match your speakers to the amp.

Connections and control

Front-panel controls provide precise gain and DSP adjustments, while the LCD display helps with your amp setup and status. LED indicators keep you aware of signal, input overload, and amp clipping. The GXD4 also offers combination XLR and 1/4" TRS input connectors for your source material, as well as binding posts and NL4 connectors for your speaker cables.

READ LESS

Product highlights:

    General Information:
    • 2-channel power amplifier
    • power output:
      • 400 watts RMS per channel at 8 ohms
      • 600 watts RMS per channel at 4 ohms
    • frequency response: 20-20,000 Hz (+0.7 dB, -0.8 dB)
    • signal-to-noise ratio: 100 dB
    • total harmonic distortion: <1.0% (1 kHz)
    Features:
    • rotary encoder knobs for gain and DSP parameter control
    • DSP includes high and low-pass filters, 4-band parameteric EQ, limiting, and delay
    • digital limiting protects amp from overheating and overdriving
    • RF, DC voltage, short circuit, and thermal protection
    • front-panel LEDs indicate signal presence, clipping, and input overload
    • integrated rack mount ears
    Connections:
    • inputs: balanced XLR and 1/4" TRS
    • outputs: binding posts and NL4 connectors
    Other Information:
    • dimensions: 19"W x 3-1/2"H x 10-1/4"D (2 rack spaces)
    • weight: 11.3 lbs.
    • warranty: 3 years
    • MFR # GXD4

    What's in the box:

    • 2-Channel power amplifier
    • 5' AC power cord (3-prong IEC)
    • Quick Start Guide
    • Warranty Registration information

    Featured video:

    Customer reviews for QSC GXD4

    We don't have any reviews, yet.
    Submit a review and then enter to win a $350 gift card.
    Be the first to review this product

    Loading reviews...

    Thanks for submitting your review

    Filter by rating

    Customer photos

    Customer provided image, click to load a larger version.
    Customer provided image, click to load a larger version.

    Sort reviews

    Sort by:
    Items per page:
    View page:

    Verified customer (What's this?)
    Verified employee review (What's this?)

    Reviewed on Samsung.com

    This review was collected as part of a promotion

    Pros:

    Cons:

    Crutchfield response
    Customer provided image, click to load a larger version.
    << >>

    More details on the QSC GXD4

    Russ B.

    Features & specs

    General
    Number of Channels 2
    Power Class D
    Watts per channel 8 ohms 400
    Watts per channel 4 ohms 600
    Watts per channel 2 ohms ---
    Watts bridged ---
    Fan cooled Y
    DSP Y
    Filters Hi- / Lo-pass
    Rack spaces 2
    Height (inches) 3-1/2
    Depth (inches) 10-3/16
    Width (inches) 18-15/16
    Weight 11.3 lbs
    Inputs
    RCA ---
    1/4" 2
    XLR 2
    Outputs
    1/4" ---
    Binding post 2
    Spring post ---

    Product Research

    Features

    Overview: The QSC GXD series of 2-channel amplifiers are optimized for 8 and 4 ohm speaker loads, and feature special tunings to maximize the performance of the QSC E Series loudspeakers. The amps have a Class D output stage, digital signal processing, high- and low-pass filters, and digital limiting. The GXD 4 is designed to be rack-mounted and takes up 2 RU (rack units).

    Power Output: The GXD 4 amplifier's output power is rated as follows in stereo mode, both channels driven:

    • 8Ω Continuous: 400 watts
    • 4Ω Continuous: 600 watts
    • 8Ω Dynamic: 600 watts
    • 4Ω Dynamic: 800 watts

    Inputs: The GXD 4 features a pair of balanced XLR inputs and a pair of 1/4" jacks that will accept either balanced TRS or unbalanced TS inputs. The balanced inputs can be used for long or short runs, while the unbalanced inputs should only be used for short runs. The XLR and TRS jacks are connected internally and provide feed-thru to the other connector.

    Speaker Outputs: The GXD 4 is equipped with a pair of professional NL4 speaker terminals and two pairs of binding post speaker terminals for mono and bi-amp speaker connectivity.

    Independent Gain Controls: The GXD series amplifier offers independent rotary gain controls for Channel 1 and Channel 2. The gain controls provide precise setting and matching of sensitivity.

    Digital Signal Processing: The GXD 4 features Digital Signal Processing with a 2.12" x 1" LCD display with 256 x 128 pixel resolution. The DSP can be set as Stereo DSP with changes being made to both channels simultaneously, or DSP A & DSP B with changes being made to each channel independently (except for Input Sensitivity). The DSP controls include:

    • Crossover:
      • 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
    • PEQ (Parametric EQ): 4-bands with variable frequency, gain, and bandwidth
    • Delay: up to 50 msec
    • Limiter: peak limiter with power, aggressiveness, and impedance selection

    Presets: The amplifier features presets that can be used for configuring the output to suit the loudspeaker type:

    Loudspeaker Type DSP Type High-Pass Filter Low-Pass Filter
    Full Range Satellite Stereo 20Hz, 80Hz, 90Hz, 100Hz Bypass
    Subwoofer Stereo 20Hz 80Hz, 90Hz, 100Hz
    Monitor DSP A
    DSP B
    60Hz, 80Hz, 100Hz Bypass
    60Hz, 80Hz, 100Hz Bypass
    Subwoofer + Full Range Satellite DSP A 20Hz 80Hz, 90Hz, 100Hz
    DSP B 80Hz, 90Hz, 100Hz Bypass
    Bi-amp DSP A 20Hz 1000Hz, 1100Hz, 1200Hz, 1300Hz, 1500Hz
    DSP B 1000Hz, 1100Hz, 1200Hz, 1300Hz, 1500Hz Bypass
    Mono Full Range Satellites Stereo 50Hz, 100Hz Bypass

    Front-Panel LEDs: The front panel features the following LED indicators: 2 Green Signal LEDs to indicate signal presence, 2 Red A/D Clip LEDs indicate input over-drive and/or amplifier current clipping, and a Blue Power LED ring around the power button to indicate power is on.

    Cooling Fan/Ventilation: The amp features an internal fan to move air through the chassis and out of its front- and rear-panel vents to reduce internal temperatures. The fan has a variable speed that increases or decreases based on the amount of usage.

    Protection: The GXD 4 has protection circuitry against short circuits, open circuits, thermal, RF, and DC faults.

    Specifications:

    • Frequency Response: 20Hz - 20kHz (+0.7 dB, -0,8 dB)
    • Distortion: < 1% THD
    • Maximum Input Level: +23.5 dBu
    • Signal-to-Noise Ratio: 100 dB (A-weighted, 20Hz-20kHz)
    • Input Sensitivity: 1.2 VRMS, 3.9VRMS
    • Voltage Gain (8Ω): 33.5 dB
    • Dynamic Headroom: 1.25 dB
    • Damping Factor: 100
    • Input Impedance: 20k (balanced), 10k (unbalanced)
    • Dimensions: 18.9375" W x 3.492" H x 10.18" D
    • Weight: 11.3 pounds

    Loading accessories...

    Customer Q&A

    2 questions already asked

    Q
    How do I go up on the GXD 4 QSC amp?
    linster  Aug 17, 2022
    1 answer
    A
    I'm not quite sure what you mean by "go up" Linster, but I'll try to answer for you! If you need more power or an upgrade from the QSC GXD4 essentially going up on performance you can use this QSC GXD8 unit in the link below. This is twice as powerful and has the same smorgasbord of DSP control, a sure winner! If you need to "go up" by cranking up louder, that is controlled by the two gain knobs on the front panel. I hope this helps! https://www.crutchfield.com/p_907GXD8/QSC-GXD8.html
    bo  Aug 17, 2022 (Staff)
    Q
    Is there a Fan in amp?
    russell  Jun 06, 2022
    1 answer
    A
    Greetings Russell, and thank you for your question. It has a variable speed fan built in that adjusts automatically based on the usage of the amplifier.
    thomas  Jun 07, 2022 (Staff)

    Loading articles...

    Compare the sound