• Shop by Department
  • Hot Deals

6-12 Month Financing

QSC GX3 Stereo Power Amplifier  

  • Write a Review
SKU 
#481804000000000
Top Rated

Overview

  • Power levels matched to the most popular speakers used by entertainers
  • Optimized for maximum real-world headroom into 4Ω and 8Ω speaker systems
  • Inputs: XLR, 1/4" TRS and phono input connectors for compatibility with any source
Description & Specs
  • MSRP:
    $399.00
  • Your Savings:
    - $99.01
  • Your Price:
    $29999

In Stock & Ready To Ship

Gold Coverage: (What’s This?)

+ Add to Wish List
See All QSC Live Power Amplifiers
Also Consider
Also consider
      QSC

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

      The QSC GX3 Stereo Power Amplifier is ideal for professional entertainers who require maximum performance and portability on a limited budget. QSC designers have optimized output and appearance of the GX3 power amp while reducing raw material cost and weight. The rackmount GX3 power amplifier is ideal for speakers in the 300W (Program) range and supplies maximum possible power to 4 ohm and 8 ohm loads.

      The GX3 power amp uses the latest QSC Grounded Collector output system for optimum cooling of the critical power transistors. The GX3 power amp's true Class B biasing system combines maximum thermal efficiency with excellent audio performance.

      Features

      • Power levels matched to the most popular speakers used by entertainers
      • Optimized for maximum real-world headroom into 4Ω and 8Ω 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

      Order today and enjoy legendary QSC quality and reliability.

       

      GX3 Stereo Power Amplifier Specifications:

      • Power Rating:
      • 8Ω / both channels driven / 1 kHz: 300 W
      • 8Ω / single channel driven / 1 kHz: 350 W
      • 4Ω / both channels driven / 1 kHz; 425 W
      • 4Ω / single channel driven / 1 kHz; 500 W
      • 2Ω / both channels driven / 1 kHz; 200 W
      • Distortion (typical): 20 Hz - 20 kHz: 1 dB below rated power 8Ω: less than 0.05% / 4Ω: less than 0.1%
      • Signal to Noise: (20 Hz - 20 kHz) 100 dB
      • Input Sensitivity: 1.2 Vrms
      • Voltage Gain: (8Ω) 32.2 dB
      • Output Circuitry: Class B
      • Power Requirements: (1/8 power, pink noise at 4Ω, 120 V) 6.3A
      • Frequency Response: 20 Hz - 20 kHz, +0, 1 dB
      • Dynamic Headroom (4Ω): 2 dB
      • Damping Factor: 100
      • Input Impedance (Ω): 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)
      • 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 lbs (11.5 kg) Agency Approvals: UL, CE, RoHS/WEEE compliant
      Customer Reviews
      Loading....

      Review Snapshot®

      by PowerReviews
      QSCGX3 Stereo Power Amplifier
       
      4.9

      (based on 22 reviews)

      Ratings Distribution

      • 5 Stars

         

        (20)

      • 4 Stars

         

        (2)

      • 3 Stars

         

        (0)

      • 2 Stars

         

        (0)

      • 1 Stars

         

        (0)

      100%

      of respondents would recommend this to a friend.

      Pros

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

      Cons

        Best Uses

        • Outdoor events / games (4)
        • Performances (4)
        • Pro audio / DJ / mixing (4)
          • Reviewer Profile:
          • Experienced (4)

        Reviewed by 22 customers

        Sort by

        Displaying reviews 1-10

        Back to top

        Previous | Next »

         
        4.0

        Great AMP

        By DC Karaoke

        from Galveston, Texas

        About Me Experienced

        Verified Reviewer

        Pros

        • Excellent Sound
        • Good Warmth
        • Powerful
        • Rugged Construction

        Cons

          Best Uses

          • Amateur Recording
          • Events
          • Karaoke shows
          • Mobile DJ
          • Professional Recording

          Comments about QSC GX3 Stereo Power Amplifier:

          I bought this amp, only needing a small amount of power but it quickly surprised me. I have run this with both Berhinger 15' speaks, and a pair of Peavy dual 15' towers. Worked great for both. Only buying a new one because user errors... Meaning one drink fan and a pitcher of beer is never good for your amps life expectancy :D Great product!

          Comment on this review

          (2 of 2 customers found this review helpful)

           
          5.0

          Clear with punch!

          By Rocker103

          from Mason, OH

          About Me Professional Musician

          Ask me a question

          Verified Buyer

          Pros

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

          Cons

            Best Uses

            • Events
            • Mobile DJ
            • Performances
            • Rehearsal PA

            Comments about QSC GX3 Stereo Power Amplifier:

            I've had this amp for a couple of weeks now & it's doing a great job so far. I bought this one to replace my very old Peavey CS400 for pushing the mains (Kustom KPC215H 2X15 PA Cabinet Pair) I use for rehearsals, & while teaching guitar 2 days a week from my home.

            I mostly selected the GX3 because of 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. The only plus to the crown was the weight of only around 10 lbs vs the QSC's 25 lbs. But in all other ways, this won.

            So far the amps doing a great job, especially since I upgraded my cables going from the outputs on my Tascam mixer to TRS, which is what this amp needs to really sound it's best. The old TS cables worked great with the old amp, but this required the upgrade.

            As others have mentioned, I do hear a more distinct sound coming from the fan in this amp. While I wouldn't call it loud, it is more noticeable, but the fans about half the size in this amp compared to the old one. A higher more noticeable pitch is understandable I suppose.

            Only time will tell how well the GX3 will hold up. I'm hoping it lasts as long as my Peavey did. I bought it used in 1983!

            Comment on this review

            (1 of 1 customers found this review helpful)

             
            5.0

            GX3 Review

            By Albatross

            from Milwaukee, WI

            About Me Experienced

            Ask me a question

            Pros

            • Easy To Use

            Cons

              Best Uses

              • Events
              • Performances

              Comments about QSC GX3 Stereo Power Amplifier:

              So far I have not experienced any of the fan noise that some other reviewers complained about. The GX3 is used to power our floor monitors, and does an excellent job, with no unwanted noise that I can detect. Sound quality is very good and although this amp isn't terribly powerful, it's easily powerful enough to run the monitors.
              One thing I like about this that helped me decide to buy this over some others is the ease of use. Some other power amps require various different types of plugs, and if you don't have speaker cables with those plugs, you have to spend money on adapters. With the QSC, I can plug my regular 1/4 inch speaker cables right into the power amp and not worry about adapters or having the right type of cable handy. I like making setup and tear down easy, and this amp is very easy to run. Basically just plug it in, turn it on, and you're ready. Larger bands or larger venues may want to consider getting the next step up with more power, but for our band, this works nicely.

              Comment on this review

              (1 of 1 customers found this review helpful)

               
              5.0

              thay've done it again...

              By 1 sound man

              from fayetteville, nc

              Ask me a question

              Verified Buyer

              Comments about QSC GX3 Stereo Power Amplifier:

              this one runs a pair of PV118 subs and the GX5 runs a pair of PV215s for the mains...we have enough sound for any small to medium venue...thanks goes to musicians friend for the great deals and QSC for a quality product! the shallow rack mount is a plus when buying (and carrying) rack cases ;-)

              Comment on this review

              (1 of 1 customers found this review helpful)

               
              5.0

              Nice Pro Amp does the job

              By Robert Gaines

              from Bay Area

              About Me Professional Musician

              Pros

              • Easy To Use
              • Excellent Sound
              • Good Warmth

              Cons

                Best Uses

                • Events
                • Performances

                Comments about QSC GX3 Stereo Power Amplifier:

                I bought one of these to power some JBL MR series PA cabinets with 15's for vocals for my band and am very pleased with it. Clean design & quiet.

                Comment on this review

                (1 of 1 customers found this review helpful)

                 
                5.0

                So Far So Good

                By journeyman21

                from Orlando Fl

                About Me Experienced

                Verified Buyer

                Pros

                • Extra Clean

                Cons

                  Best Uses

                  • Amateur Recording
                  • Home Studio
                  • Mobile DJ
                  • Modeling Processor Amp
                  • Performances
                  • Professional Recording

                  Comments about QSC GX3 Stereo Power Amplifier:

                  Sounds really clear at any volume. Will Drive Your 300 watt speakers

                  Comment on this review

                   
                  5.0

                  Great Amplifier

                  By Mitch-ZeLj9

                  from PITTSBURGH

                  About Me Experienced

                  Ask me a question

                  Verified Buyer

                  Pros

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

                  Cons

                  • None

                  Best Uses

                  • Loud sound
                  • Mobile DJ

                  Comments about QSC GX3 Stereo Power Amplifier:

                  Amp is still heavy but I was able to reduce what I carry due to this unit have great power. I now have to watch that I don't blow my speakers. Great Amp.

                  Comment on this review

                  (4 of 5 customers found this review helpful)

                   
                  5.0

                  Great little amp

                  Comments about QSC GX3 Stereo Power Amplifier:

                  Great little amp worth the price. Has great power and sound. Brings my keyboards and organs to life. Would recomend this amp to all. Get one today.

                  Comment on this review

                  (3 of 3 customers found this review helpful)

                   
                  5.0

                  QSC GX3 Stereo Power Amp

                  By Chris LaPlante

                  from Connecticut

                  Comments about QSC GX3 Stereo Power Amplifier:

                  I think the 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. Haven't had a need for the built in 100 Hz crossover, but when I decide to buy a separate sub I will definitely use it. The one feature I would add is handles on the front for easier mounting.
                  Built tough, and capable of handling tour use. Love the optional rear rack mounts. The sound quality is crisp and clean. I use the GX3 with a couple of Bose 802's and I just love the sound that it puts out.
                  Just the right amount of power for my needs without having to sell a kidney to get it. Great value.

                  Comment on this review

                  (1 of 1 customers found this review helpful)

                   
                  5.0

                  SOLD ON QSC!

                  By The guitar guy

                  from North Dakota

                  Comments about QSC GX3 Stereo Power Amplifier:

                  The sound quality it there with this amp. I'm sold now on QSC and will buy only their amps for any future needs.
                  I had some extra rack equipment sitting around so I put together a stereo system for my party room. This amp was perfect. I'm runing a mono signal and using the bi-amp function to power two PV118 cabs and two Peavey 15 inch monitor speakers. For pre-recorded music, it's a great set-up. The party room shakes when I turn up the lows. I'm very happy with the quality of this amp. The price was great for what you get.
                  Well built.
                  425 watts per side at 4 ohms with bi-amp 100 hz x-over for this price!

                  Comment on this review

                  Displaying reviews 1-10

                  Back to top

                  Previous | Next »

                  You are changing the Ship-To country.

                  Our product catalog varies by country due to manufacturer restrictions. If you change the Ship-To country, some or all of the items in your cart may not ship to the new destination.