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QSC GX3 Stereo Power Amplifier

Name: QSC GX3 Stereo Power Amplifier
Brand: QSC
SKU: 481804000000000
Price: 499.00 USD
Availability: InStock
Rating: 5 (28 reviews)

(28) Q&A SKU #481804000000000

$599.99 $49900 Price Drop: $100.99 (17%)

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*Excluding the following: Special orders, gift cards, used items, vintage items, open-box items, and clearance items. Qualifying purchase amount must be on one receipt and cannot be combined with promotional coupons. A promo fee, equal to 2% of the amount financed at time of purchase, will be shown as a separate transaction on your billing statement and included in the balance subject to this promo. Any taxes, delivery or other charges included in the amount financed will increase the related promo fee and the required monthly payments. For example, a $950 purchase with $50 in taxes and shipping costs, will be charged a promo fee equal to $20 and $1,020 will be charged to your account. No interest will be charged on the amount financed (including related promo fee), and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the initial total promo purchase amount (including related promo fee) divided by the number of months in the promo period, rounded up to the next whole cent. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period, the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. For new accounts: as of 7/16/2024: Purchase APR is 34.99%. Penalty APR is 39.99% Minimum interest charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval. Offer available 07/06/2025 - 08/17/2025.

^ A promo fee, equal to 2% of the amount financed at time of purchase, will be shown as a separate transaction on your billing statement and included in the balance subject to this promo. Any taxes, delivery or other charges included in the amount financed will increase the related promo fee and the required monthly payment. The estimated monthly payment shown (excluding taxes and delivery) equals the amount financed (including related promo fee) divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make your payments by the due date each month, you should pay off this amount financed (including related promo fee) within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this monthly payment will be added to the minimum payment applicable to those balances.

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Overview

Maximum performance at a modest price, plus flexible I/O.

The GX3 stereo power amplifier from QSC offers everything performers need to electrify their live shows with 300W per channel of power, while remaining light enough to transport between gigs. Optimized for speakers in the 300W range, the GX3 effortlessly drives 4 ohm and 8 ohm loads for full, rich sound.

Advanced Cooling System Keeps Things Running Smoothly

The GX3 utilizes QSC's acclaimed Grounded Collector output system to keep internal components operating at peak efficiency, even under demanding conditions. By effectively dissipating heat, the GX3 avoids performance issues that often plague lesser amplifiers. You'll enjoy consistent, uncompromised sound for the duration of your show.

Intuitive Controls Make Adjustments a Breeze

With its straightforward front panel layout, the GX3 amplifier is easy to set up and adjust on the fly. Turn the level knobs to quickly balance left and right channels, while the power switch and LED indicator provide an obvious visual reference for on/off status. For many performers, the GX3's minimal complexity is a major benefit, allowing you to focus on your performance rather than fussing with finicky controls.

Road-Ready Ruggedness

From the durable steel chassis to the reinforced corners, the GX3 is built to withstand the rigors of live performance and frequent transport between venues. It will provide years of reliable service, giving you peace of mind that it can handle whatever your schedule demands. The included mounting ears make rack installation quick and secure.

Unmatched Value

For professional entertainers seeking maximum power and portability on a budget, the GX3 stereo power amplifier offers unparalleled performance per dollar. With QSC's signature sound quality and build, it's an ideal choice for taking your show to the next level without breaking the bank.

Features

Power levels matched to the most popular speakers used by entertainers
Optimized for maximum real-world headroom into 4 ohm and 8 ohm speaker systems
Inputs: XLR, 1/4" TRS and phono input connectors for compatibility with any source
Outputs: Speakon combo accepts, 1/4" (TS) plugs or speakON 2-pole and 4-pole plugs (connects 2 poles only), binding posts support all other speaker wiring systems
Minimum depth chassis (10.1"/257 mm) fits in compact, inexpensive effects racks
Lightweight: less than 26 lb. (12.5 kg)
Detented gain controls for precise setting and matching of sensitivity
GuardRail automatically protects the amplifier and loudspeakers from damage due to temperature rise or overdrive without shutting down the show
Front panel LEDs monitor Power, Signal and Clipping
Subwoofer/Satellite crossover built-in

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Specs

GX3 Stereo Power Amplifier Specifications:

Power Rating

8 ohm / both channels driven / 1kHz: 300W
8 ohm / single channel driven / 1kHz: 350W
4 ohm / both channels driven / 1kHz; 425W
4 ohm / single channel driven / 1kHz; 500W
2 ohm / both channels driven / 1kHz; 200W
Distortion (typical): 20Hz–20kHz: 1dB below rated power 8 ohm: less than 0.05%/4 ohm: less than 0.1%
Signal to Noise: (20Hz–20 kHz) 100dB
Input Sensitivity: 1.2 Vrms
Voltage Gain: (8 ohm) 32.2dB
Output Circuitry: Class B
Power Requirements: (1/8 power, pink noise at 4 ohm, 120V) 6.3A
Frequency Response: 20 Hz–20 kHz, +0, 1dB
Dynamic Headroom (4 ohm): 2dB
Damping Factor: 100
Input Impedance (ohm): Greater than 20k (balanced)
Maximum Input Level: +24dB (16 Vrms)
Input Connectors (each channel): 3-pin XLR and 1/4" TRS, balanced, parallel Phono, unbalanced
Output Connectors (each channel) Speakon, 1/4", Binding Posts
Amplifier and Load Protection: Short circuit, open circuit, thermal, RF protection
Load protected against DC faults
Front Panel Controls and Indicators: Gain controls, 21 detents
Red Clip LEDs, proportional, 0.1% THD threshold
Green Signal LEDs, threshold -35dB
Blue Power LED, AC on
Rear Panel Controls: Full Range / Crossover switch
100 Hz, 3rd order LP (sub), 2nd order HP (top)
Dimensions (HWD): 3.5" (2RU) x 19" x 10.1" (89 mm x 483 mm x 257 mm)
Weight: Shipping / Net 30 (13.5 kg) / 25 lb. (11.5 kg) Agency Approvals: UL, CE, RoHS/WEEE compliant

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