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QSC GX3 Stereo Power Amplifier  

Item #: 
1274034490353
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The GX3 Stereo Power Amplifier from QSC is ideal for professional entertainers who require maximum performance and portability on a limited budget. QSC designers have optimized output and appearance o... Click To Read More About This Product

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$29999.00
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Overview

The GX3 Stereo Power Amplifier from QSC 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, while reducing raw material cost and weight. The rackmount GX3 power amp is ideal for speakers in the 300 watt (Program) range and supplies maximum possible power to 4 ohm and 8 ohm loads.

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.

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
  • 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
Warranty

GUITAR CENTER'S PRO COVERAGE
Pro Coverage gives you added warranty protection for your new gear. Stepping in where the manufacturer's "normal wear and tear" coverage ends, our Pro Coverage program offers you upgraded coverage if your product ever fails Read More.

Pro Coverage includes
  • Accidental damage protection (new gear only)
  • Expedited repair
  • Free shipping (for returns or repairs)
  • 100% coverage for commercial use
  • Extended return period
  • Extended price protection
  • No lemon guarantee
  • Free transfer of coverage to a new owner
  • Repair costs covered for up to three years from date of purchase
  • Repair authorization-toll-free by phone or via the web
  • Customer Reviews
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Review Snapshot

by PowerReviews
QSCGX3 Stereo Power Amplifier
 
4.9

(based on 35 reviews)

Ratings Distribution

  • 5 Stars

     

    (33)

  • 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

No Cons

Best Uses

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

Reviewed by 35 customers

Displaying reviews 1-10

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5.0

Power Amp

By ValleyD

from USA, VA

Verified Buyer

Comments about GX3 Stereo Power Amplifier:

Purchased this item after reading reviews and it did not disappoint. Sounds clear and plenty of power for our use of a monitor amp. Also plenty of hookup options.

 
5.0

Great amp

By David

from undisclosed

Verified Buyer

Comments about GX3 Stereo Power Amplifier:

So far this Amp has been great. Has plenty of power and is very clear. Not too heavy either which is nice when humping around a rack.

 
5.0

i would buy this amp again

By toden

from houston tx

About Me Novice

Comments about QSC GX3 Stereo Power Amplifier:

very good it so powerfull

 
5.0

Great sound

By WILLIAM

from El Cajon CA

Comments about QSC GX3 Stereo Power Amplifier:

I wanted a rackmount amp for my home studio and bought the GX3. I don't need as much power as the GX3 provides but I like the amp. I was really impressed by the sound quality and the solid construction. What I really like is the volume controls with the detent switches. This provides easy balancing the of the two output channels. I was also concerned about the fan noise but it's really not noticeable during playback. I also like the assortment of connections on the back panel.

(1 of 2 customers found this review helpful)

 
4.0

Great AMP

By DC Karaoke

from Galveston, Texas

About Me Experienced

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!

    (1 of 1 customers found this review helpful)

     
    5.0

    Best bang for the buck

    By James Webb

    from New York, NY

    Comments about QSC GX3 Stereo Power Amplifier:

    I have been using QSC amps for more than 25 years. I started to purchase powered cabinets, but needed that raw power and warmth. I have used this GX-3 about 10 times, indoor, outdoor with audiences up to 500. More than enough for my mobile DJ sets. Has not failed me once. I knew once I set the levels, I would not have to check until the end of the gig. Everyone compliments me on my sound and I owe it all to QSC and of course GC.

    (3 of 3 customers found this review helpful)

     
    5.0

    Clear with punch!

    By Rocker103

    from Mason, OH

    About Me Professional Musician

    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

      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

        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 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.

          Displaying reviews 1-10

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