QSC GX3 Stereo Power Amplifier

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MSRP: $399.00 $299.99 Save : $99.01 (25%)
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Product Rating:

 
4.6

(11 reviews)

  • Description
  • Specifications
  • Reviews
  • Warranty
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OSC GX3 amplifiers are ideal for professional entertainers who demand maximum performance and portabilit, all on a limited budget.

The QSC GX3 stereo power amplifier have optimized output and appearance while reducing raw material cost and weight. It's all here – dramatic styling, easy hookup and adjustments, excellent audio quality and QSC reliability.

QSC GX3 stereo power amplifiers deliver just the right amount of power to the most popular speakers used by entertainers. Most 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. The GX3 is ideal for speakers in the 300 watt (Program) range, supplying maximum possible power to 4 ohm and 8 ohm loads.

Technical Notes
The GX3 uses the latest evolution of the QSC Grounded Collector output system, for optimum cooling of the critical power transistors. A true Class B biasing system combines maximum thermal efficiency with excellent audio performance.

GuardRail™
GuardRail protection delivers full peak power while preventing detrimental overloads. During excessive clipping, or extreme overheating, GuardRail reduces gain just enough to preserve the integrity of the music, protect the speakers and keep the audience excited, without unprofessional distortion levels or shutdowns.

Subwoofer/Satellite Crossover
A subwoofer reduces strain on the full-range speaker, allowing it to play louder, or letting a smaller speaker do the same job. The GX Series supports this mode with a Crossover switch that splits the full-range input entering Ch 1, sending 20 Hz - 100 Hz to the sub (Ch 1) and 100 Hz - 20 kHz to the top box (Ch 2). The front panel gain controls balance the sub and top box, while GuardRail optimizes peak power into the sub and top individually, for greater musical impact and dynamic range.

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 lbs (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

Specifications:
  • 8 ohms / 1 kHz (both channels driven) 300 W
  • 8 ohms / 1 kHz (single channels driven) 350 W
  • 4 ohms / 1 kHz (both channels driven) 425 W
  • 4 ohms / 1 kHz (single channels driven) 500 W
  • Distortion (typical) 20 Hz - 20 kHz, 1 dB below rated power: 8 ohms: less than 0.05%; 4 ohms: less than 0.1%
  • Signal to Noise (20 Hz - 20 kHz)  100 dB
  • Input Sensitivity 1.2 Vrms
  • Voltage Gain (8 ohms)  32.2 dB  34.4 dB
  • Output Circuitry Class B
  • Power Requirements (1/8 power, pink noise at 4 ohms, 120V)  6.3A
  • Frequency Response 20 Hz - 20 kHz, +0, 1 dB
  • Dynamic Headroom (4 ohms) 2 dB
  • Damping Factor (8 ohms) 100
  • Input Impedance (ohms)  Greater than 20k (balanced)
  • Maximum Input Level +24 dB (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 -35 dB; Blue Power LED, AC on
  • Rear Panel Controls Full Range / Crossover switch; 100 Hz, 3rd order LP (sub), 2nd order HP (top)








Things You Will Get:


    GX3 Power Amp
    Power Cable
    Owner's Manual
Inputs 3-pin XLR and 1/4" TRS, balanced, parallel; Phono, unbalanced
Series GX
Other Features GuardRail™ automatically protects the amplifier and loudspeakers from damage due to temperature rise or overdrive without shutting down the show
Model GX3 ,  3
Rack Spaces 2 Space
Channels 2
Weight 16.5 lbs (7.5 kg)
Dimensions 19"W x 3.5"H x 10.1"D
DSP N/A
Power Class Class B
Watts/Side @ 4 ohms 425 W Stereo / 500W Bridge Mono
Watts/Side @ 8 ohms 4 ohms / 1 kHz (single channel driven)
Outputs Speakon®, 1/4", Binding Posts

REVIEW SNAPSHOT®

by PowerReviews
QSCGX3 Stereo Power Amplifier
 
4.6

(based on 11 reviews)

100%

of respondents would recommend this to a friend.

Pros

  • Excellent sound (7)
  • Easy to use (5)
  • Good power output (5)
  • Portable (4)
  • Warm / comfy (3)

Cons

    Best Uses

    • Performances (6)
    • Outdoor events / games (5)
    • Pro audio / DJ / mixing (5)
    • Home studio (3)
      • Reviewer Profile:
      • Experienced (5), Professional musician (3)

    Reviewed by 11 customers

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    Displaying reviews 1-10

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    5.0

    Very awesome amplifier!

    By 

    from Queens, NY

    About Me Professional Musician

    Verified Reviewer

    Pros

      Cons

        Best Uses

          Comments about QSC GX3 Stereo Power Amplifier:

          The QSC GX3 Stereo Power Amplifier is a great powerful amplifier to really get your speakers up and running! This is great for a medium to large venue. It is solidly built so you don't have to worry about it being destroyed, but yet it doesn't weight too much as well. The sound is great.

          This is a real hands on product review from Scott @ Sam Ash Queens

           
          5.0

          Great AMP by QSC

          By 

          from Phoenix, AZ

          About Me Professional Musician

          Verified Reviewer

          Pros

          • Easy To Use
          • Excellent Sound
          • Good Warmth
          • Portable
          • Powerful

          Cons

            Best Uses

            • Amateur Recording
            • Events
            • Home Studio
            • Mobile DJ
            • Performances
            • Professional Recording

            Comments about QSC GX3 Stereo Power Amplifier:

            The QSC GX3 Stereo Power Amp is perfect for a medium to large venue/audience setting. It's not too heavy and doesn't take up a lot of space. I would definitely recommend this amp to anyone who needs some power for their speakers and who is on a budget. The features are what you expect to find on most modern amps. Built tough, and capable of handling tour use. Love the optional rear rack mounts. The sound quality is crisp and clean. Just the right amount of power for a great price. Great value. This is a real hands-on product review from Rick @ Sam Ash Phoenix.

             
            4.0

            AWESOME!

            By 

            from SARASOTA, FL

            About Me Experienced

            Pros

            • Easy To Use
            • Excellent Sound
            • Good Warmth
            • Portable
            • Powerful

            Cons

              Best Uses

              • Amateur Recording
              • Events
              • Home Studio
              • Mobile DJ
              • Performances
              • Professional Recording

              Comments about QSC GX3 Stereo Power Amplifier:

              SOLID POWER
              QUALITY PUNCH TO THE SOUND
              VERY DEPENDABLE
              NICE PURE CONSISTENT SOUND
              CANT GO WRONG WITH QSC QUALITY

              -THIS HAS BEEN A REAL HANDS ON REVIEW FROM CHRIS

               
              4.0

              Solid power amp!

              By 

              from Cincinnati, OH

              About Me Experienced

              Pros

              • Easy To Use
              • Excellent Sound
              • Good Warmth
              • Powerful

              Cons

              • Surprisingly Heavy

              Best Uses

              • Events
              • Performances

              Comments about QSC GX3 Stereo Power Amplifier:

              While it is heavy, the GX3 delivers a lot of power, and does so cleanly. Many lighter weight alternatives promise to deliver the power that the QSC has, but trade sound quality for lighter weight inner workings.

              This is a real hands on product review from Eric @ Sam Ash Paramus

               
              4.0

              Sweet Amp

              By 

              from KOP

              Verified Reviewer

              Comments about QSC GX3 Stereo Power Amplifier:

              Easy to use. Easy to setup. Great sound and functionality. Portable. Lots of fun. Good power for price.
              I am a Sam Ash reviewer from KOP.

               
              5.0

              Rock solid amp!

              By 

              from Chicago, Il

              Staff Reviewer

              Pros

              • Excellent Sound

              Cons

                Best Uses

                • Mobile DJ
                • Performances

                Comments about QSC GX3 Stereo Power Amplifier:

                This is a little "gem" of an amp! It is very dependable, and dynamic and the sound is very pure. It has performed much better than I expected, however I have always been a fan and user of QSC amplification. Every time I've used it I have been very pleased- whether DJing or using it for live band work. This is a very good amp.
                This is a real hands on product review from Warren @ Sam Ash Buffalo Grove

                 
                5.0

                Killer amp Killer sound!

                By 

                from CLEVELAND ROCKS! OHIO

                About Me Experienced

                Pros

                • Easy To Use
                • Excellent Sound
                • Portable
                • Powerful

                Cons

                  Best Uses

                  • Events
                  • Home Studio
                  • Mobile DJ
                  • Performances

                  Comments about QSC GX3 Stereo Power Amplifier:

                  What a tank QSC has come out with! Perfect for so many speakers available on the market today with 300 watts at 8 ohms.
                  built in cooling system and the fail safe GuardRail protection insures that the show will go on in any setting! not to mention you can split channel on and channel to for one to be your high frequencies and channel two to be your subwoofer channel! all this on top of that fantastic qsc sound makes this amp a winner!

                  I am a staff Reviewer for Sam Ash Music

                   
                  5.0

                  Clean Amp Power!

                  By 

                  from Chicago, Il

                  Staff Reviewer

                  Comments about QSC GX3 Stereo Power Amplifier:

                  Great little amp worth the price. Has great power and sound. I like the choices it gives me with the in/output section, plus more power than the Crown I was comparing it to which sells for the same price.
                  Brings my keyboards and organs to life. Would recommend this amp to all. Get one today.
                  This is a real hands on product review from Warren @ Sam Ash Buffalo Grove

                   
                  4.0

                  Reliable power amp

                  By 

                  from Sam Ash Music Ontario

                  About Me Experienced

                  Verified Reviewer

                  Pros

                    Cons

                      Best Uses

                        Comments about QSC GX3 Stereo Power Amplifier:

                        300 watts at 8 ohms or 425 watts at 4 ohms. Low distortion and great clarity. A very reliable amp with one of the best warranties in the industry. 6 year manufacturer warranty. Lightweight and awesome for matching with smaller speakers for smaller gigs or venues. This is a real hands on product review by EpR@ Sam Ash Music Ontario.

                         
                        5.0

                        QSC GX3

                        By 

                        from Cincinnati oh

                        About Me Professional Musician

                        Pros

                        • Easy To Use
                        • Excellent Sound
                        • Portable
                        • Powerful

                        Cons

                          Best Uses

                          • Events
                          • Mobile DJ
                          • Performances

                          Comments about QSC GX3 Stereo Power Amplifier:

                          Great amp! 300-500 watts depending on your application and is lightweight compared to most other amplifiers

                          Displaying reviews 1-10

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                          GX3 Stereo Power Amplifier

                          The manufacturer's warranty covers parts and labor for six years from date of purchase. The warranty excludes damage from misuse, abuse, and contains other exclusions.

                          Information not available