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QSC GX5 500-Watt 8-Ohm Power Amplifier

GX amplifiers deliver just the right amount of power to the most popular speakers used by entertainers. Typically, loudspeaker manufacturers recommend an amplifier with power output equal to the speaker’s Program (Music) Power rating or two times (2 x) the Continuous (RMS) Power rating.

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  • Warranty 1 year
  • Free 30-Day returns

Description

QSC’s GX Series amplifiers are ideal for professional entertainers who require maximum performance and portability on a limited budget. The hallmarks of the QSC brand – professional audio quality, meticulous engineering, precision manufacturing and long-term reliability – are all intrinsic to GX. Add contemporary styling, multiple input/output options, light weight, and advanced protection circuitry, and the GX Series clearly represents real value – something everyone can use.

The outputs feature speaker binding posts and speakON connections. Detented gain controls provide precise level settings. QSC’s GuardRail protection delivers full peak power while preventing detrimental overloads due to excessive clipping or overheating. In addition, a built-in 180 Hz crossover splits low- and mid-frequency signal between the left and right channel. This is ideal for driving subwoofers. The GX5 is a feature packed, lightweight amplifier that’s suitable for midsize venue installation, musicians, mobile DJs, etc.

The GX5 uses a Class H system, based on key elements of the PL Series, (PLX, PL3, CX, DCA) almost doubling power in the same size and weight. QSC design expertise allows the output devices to shift from low-power to high-power rails in less than a millionth of a second, ensuring that the output power is always right where it needs to be without excess loss.

Like the GX3, the GX5 uses premium toroidal power transformers for reliable “mid-weight” performance. A variable-speed fan moves air crosswise through the amplifier, drawing cool air in over the power transformer, through the fan, and then over the heat sink. This keeps the transformer cool and allows a full size heat sink to fit in a down-sized chassis.

Features

Ouput

  • 8 ohms / 1kHz – both channels driven: 500W
  • 8 ohms / 1kHz – single channel driven: 650W
  • 4 ohms / 1kHz – both channels driven: 700W
  • 4 ohms / 1kHz – single channel driven: 850W

Distortion (1 dB below rated power, 1kHz)

  • 8 ohms: less than 0.02%
  • 4 ohms: less than 0.05%

Signal to Noise (20Hz-20kHz): 100dB

Input Sensitivity: 1.2Vrms

Frequency Response: 20Hz-20kHz, +0, -1dB

Input Connectors (each channel): 3-pin XLR and 1/4″ TRS, balanced, parallel

Output Connectors (each channel): Speakon®, 1/4″, Binding Post

Dimensions HxWxD:  3.5″ (89 mm) 2RU x 19″ (483 mm) x 10.1″ (257 mm

Weight Net: 28 lbs (12.6 kg)

Shipping: 32 lbs (14.6 kg)

QSC GX5 500-Watt 8-Ohm Power Amplifier

More Than Sound – It’s an Experience. Audio Shop Australia.

 

About brand

QSC is a leading name in professional audio, delivering premium-quality sound systems, digital mixers, power amplifiers, and loudspeakers. Known for their innovation and durability, QSC products are trusted by musicians, DJs, sound engineers, and venues worldwide. Whether you're building a live performance setup, a studio, or an event rig, QSC offers unmatched reliability and performance.

At Audio Shop Australia, you’ll find a wide range of QSC audio solutions designed for powerful sound clarity and long-lasting use—perfect for both touring professionals and sound enthusiasts.

Tech Specs
Key Specs
Number of Channels
2
Amplifier Power Rating
8 Ohms:
500 W Both Channels Driven (1 kHz, 0.1% THD)
600 W One Channel Driven (1 kHz, 0.1% THD)
4 Ohms:
700 W Both Channels Driven (1 kHz, 0.1% THD)
850 W One Channel Driven (1 kHz, 0.1% THD)
2 Ohms:
350 W Both Channels Driven (1 kHz, 1% THD)

Amplifier Class
2-Tier Class-H
Load Impedance / Voltage
4 / 8 Ohms
Analog Audio I/O
2x Combo speakON-1/4" NL4 Output
2x Binding Post Pair 2-Pin Output
2x XLR 3-Pin Balanced Input
2x 1/4" TRS Balanced Input
1x 2RCA TS Unbalanced Input

Digital I/O
No
Network I/O
No
Rackmount Size
2 U
Amplifier
Number of Channels
2
Amplifier Power Rating
8 Ohms:
500 W Both Channels Driven (1 kHz, 0.1% THD)
600 W One Channel Driven (1 kHz, 0.1% THD)
4 Ohms:
700 W Both Channels Driven (1 kHz, 0.1% THD)
850 W One Channel Driven (1 kHz, 0.1% THD)
2 Ohms:
350 W Both Channels Driven (1 kHz, 1% THD)
Amplifier Class
2-Tier Class-H
Load Impedance / Voltage
4 / 8 Ohms
Performance
Protections
DC Fault, Open Circuit, RF, Short Circuit, Thermal
Frequency Response
20 Hz to 20 kHz +0/-1 dB
Input Sensitivity
1.2 Vrms
Input Impedance
>20 Kilohms (Balanced)
Max Gain
34.4 dB
Max Input Level
+24 dBu / 16 Vrms
SNR
100 dB
Distortion
< 0.02% (1 kHz, at 8 Ohms, at Rated Power)
0.05% (1 kHz, at 4 Ohms, at Rated Power)
Signal Processing
Crossover
Low-Pass:
100 Hz, 18 dB/Octave
High-Pass:
100 Hz, 12 dB/Octave
Limiting
Yes
Connectivity
Analog Audio I/O
2x Combo speakON-1/4" NL4 Output
2x Binding Post Pair 2-Pin Output
2x XLR 3-Pin Balanced Input
2x 1/4" TRS Balanced Input
1x 2RCA TS Unbalanced Input
Digital I/O
No
Network I/O
No
USB I/O
No
Mobile App Compatible
No
Wireless
No
Power
AC Input Power
120 VAC, 60 Hz
AC Power Connector
1x IEC 15 A / NEMA 5-15
Current Consumption
120 VAC, 4 Ohms:
6 A (1/8 Power)
0.3 A (Idle)
Physical
Display & Indicators
Red LED (Clip)
Green LED (Signal)
Blue LED (Power)
Rackmount Size
2 U
Cooling
1x Fan
Certifications
CE, RoHS, UL, WEEE
Dimensions
19.0 x 3.5 x 10.1" / 483.0 x 89.0 x 257.0 mm
Weight
28 lb / 12.7 kg
Packaging Info
Package Weight
31.55 lb
Box Dimensions (LxWxH)
24 x 14 x 6"

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