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QSC GX3 Stereo Power Amplifier   

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The QSC GX3 Stereo Power Amplifier is ideal for professional entertainers who require maximum performance and portability on a limited budget. QSC de...Read More

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OVERVIEW

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
SPECIFICATIONS

GX3 Stereo Power Amplifier

  • 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
Reviews
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Review Snapshot

by PowerReviews
QSCGX3 Stereo Power Amplifier
 
4.9

(based on 24 reviews)

Ratings Distribution

  • 5 Stars

     

    (22)

  • 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 (6)
  • Excellent sound (6)
  • Good power output (5)
  • Warm / comfy (5)

Cons

No Cons

Best Uses

  • Performances (6)
  • Outdoor events / games (5)
  • Pro audio / DJ / mixing (5)
  • Amateur recording (3)
  • Professional recording (3)
    • Reviewer Profile:
    • Experienced (6)

Reviewed by 24 customers

Displaying reviews 1-10

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5.0

The quality and performance ix excellent

By Mick

from Ohio

About Me Experienced

Verified Buyer

Pros

  • Easy To Use
  • Excellent Sound
  • Powerful

Cons

    Best Uses

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

    Comments about QSC GX3 Stereo Power Amplifier:

    I use the GX3 in my recording studio to monitor the final mix I send to clients!

    (1 of 1 customers found this review helpful)

     
    5.0

    Good Choice - Easy to use powerful amps

    By bkbrocks

    from Bentonville, AR

    About Me Experienced

    Verified Buyer

    Pros

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

    Cons

      Best Uses

      • Performances

      Comments about QSC GX3 Stereo Power Amplifier:

      I have used Mackie power for years and it was time to replace my 15yr old Mackies. I teamed up with a Driverack, and wanted to get a well aligned, clean, powerful, easy to hook and go power amps for my front of house. I looked and studied for months. I soon settles on the GXs form QSC. Great amp which has clean power to drive my EV Eliminator subs and tops. I have two EV Eliminator subs and tops on both side of the stage. This is for top 40/classic rock/original rock band. The GX3 drives the tops at 4ohms and the GX5 drives the subs @ 4ohms with great efficiency. No problems from me. The GX5, and GX3 has all the clean power I'll ever need.

      (1 of 2 customers found this review helpful)

       
      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!

        (3 of 3 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!

          (3 of 3 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.

            (2 of 2 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 ;-)

            (2 of 2 customers found this review helpful)

             
            5.0

            Nice Pro Amp does the job

            By K-Kerry

            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.

              (2 of 2 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

                (1 of 1 customers found this review helpful)

                 
                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.

                (5 of 7 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.

                Displaying reviews 1-10

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