The QSC GSX GX3 Power Amplifier is designed to provide power, portability and professional sound quality at an affordable price. The GX3 features 300 watts of power at 8 ohms (both channels driven) in a design that's easy to install and delivers flexible features. The rear panel features balanced XLR and 1/4" phone inputs, as well as unbalanced RCA phono inputs for complete compatibility with professional and consumer audio gear.
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 180Hz crossover splits low and mid frequency signal between the left and right channel. This is ideal for driving sub-woofers. The GX3 is a feature packed, lightweight amplifier that's suitable for mid-size venue installation, musicians, mobile DJs, etc.
| Power Rating |
8 ohms / 1 kHz (both channels driven): 300W 8 ohms / 1 kHz (single channels driven): 350W4 ohms / 1 kHz (both channels driven): 425W 4 ohms / 1 kHz (single channels driven): 500W |
| Damping Factor | Not Specified By Manufacturer |
| Input Sensitivity | 1.2 Vrms |
| Input Impedance | Greater than 20k (balanced) |
| Gain | 32.2dB |
| Frequency Response | 20Hz - 20kHz, +0, -1 dB |
| Signal-to-Noise Ratio | 100dB |
| Total Harmonic Distortion (THD) |
8 ohms: less than 0.05% 4 ohms: less than 0.1% |
| Input Connections |
3-pin XLR and 1/4" TRS, balanced, parallel Phono, unbalanced |
| Output Connectors | Speakon, 1/4", Binding Posts |
| Controls Front Panel |
Gain controls, 21 detents Red Clip LEDs, proportional, 0.1% THD thresholdGreen Signal LEDs, threshold -35 dB Blue Power LED, AC on |
| Controls (Rear) |
Full Range / Crossover switch 100 Hz, 3rd order LP (sub), 2nd order HP (top) |
| Indicators |
Red Clip LEDs, proportional, 0.1% THD threshold Green Signal LEDs, threshold -35 dBBlue Power LED, AC on |
| Cooling | Not Specified By Manufacturer |
| Power Consumption |
0.2 AC Amps, 44 per hour idle UL, CE, RoHS/WEEE Compliant |
| Power Requirements | 1/8 power, pink noise at 4 ohms, 120V 6.3A |
| Dimensions (WxHxD) | 19 x 3.5 10.1" (483 x 89 x 257mm) |
| Weight | 26 lbs (12 kg) |
| Specialties | Subwoofer/Satellite crossover built-in |
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Reviewed by 3 customers
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Comments about QSC GX3 300 Watt 8 Ohm Power Amplifier:
Purchased for high school football stadium PA system. Works great.
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Comments about QSC GX3 300 Watt 8 Ohm Power Amplifier:
I just put two GX3 power amps in service for my church. They sound great and have plenty of power for the sanctuary mains and platform monitors. They are a good value.
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Comments about QSC GX3 300 Watt 8 Ohm Power Amplifier:
This is the second GX3 we have purchased. We use them for stage monitor mixes in our church. We are well pleased with their performance. Would recommend them to any one for this purpose.
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