QSC GXD8 Power Amplifier 2 x 1200 Watts at 4 Ohms with Built-In Loudspeaker ProcessingQSC power amplifiers have long been regarded as among the best, and for good reason. Bulletproof reliability, uncompromising sound quality, and a simple no-nonsense approach have made the QSC name synonymous with quality.
Both the GXD4 and GXD8 amps utilize a Class-D output stage for efficient output and light weight, and both contain the same suite of excellent processing options including high- and low-pass filters, parametric EQ, limiting, and delay. Also common to both models is the plethora of input/output options, lending maximum versatility to the mix. All this at prices that won't leave you having to take out a second mortgage or selling a kidney on the black market? Yes!!
All the Right Stuff - No Fluff
Best practice is to use an amplifier capable of delivering approximately twice the loudspeaker’s rated power capacity. Too little amplifier and your speakers won’t deliver everything they’re capable of, and the risk of destructive amplifier clipping is increased. Too much power probably means unnecessary amplifier expense.
To determine the power points for the GXD series, QSC examined the loudspeakers most widely used for sound reinforcement by musicians, DJs and production professionals. Overall, these speakers are equipped with woofers that fall into a couple of categories of continuous power capacity: low-power drivers that can handle 150 - 250 watts; and mid to high-power drivers rated around 250-400 watts. Single woofer loudspeaker systems using these drivers will typically have an impedance of 8 ohms. Dual woofer loudspeakers will, of course, have power ratings that are two times that of the single woofer model and an impedance that is half that of single-woofer models.
Connections Galore
The GXD amps feature parallel XLR and 1/4" TRS inputs, as well as heavy duty binding post and professional NL4 (NL2 compatible) outputs for maximum flexibility in the field and quick, reliable connectivity in any situation.
Processing with Precision
The GXD amplifiers are unlike other amps in this category that provide little more than a front panel screen to control the same functions that have been under rear-panel, DIP switch control for decades. The GXD amps bring full-function loudspeaker processing capability to a new price point with all the processing necessary to get the most from a loudspeaker system. The DSP section includes high- and low-Pass filters (24 dB LR), 4-band parametric equalizer, signal alignment delay, and RMS/Peak speaker protection limiting. Twenty presets for selected typical systems are provided as generic starting points are included.
Digital Defense
The most common cause of loudspeaker failure is amplifier clipping. The digital limiter used in the GXD amplifiers is set to prevent the amplifier from being driven into clipping while delivering the maximum usable output. In addition to amplifier limiting it also provides smart speaker protection by simply setting the loudspeaker’s continuous power and impedance (4 ohm and 8 ohm), and selecting whether Mild, Medium or Aggressive protection is desired.
Specifications: • Output power (per channel, stereo): 800 watts continuous, 1500 watts dynamic (8 ohms); 1200 watts continuous, 2250 watts dynamic (4 ohms) • Frequency response: 20 - 20,000 Hz, +0.7/-0.8 dB • Distortion: < 1% • Damping factor: > 100 • Signal-to-noise ratio: > 100 dB • Input sensitivity: 1.2 Vrms or 3.9 Vrms • Dimensions: 3.5" H x 19" W x 10.2" D (89 x 483 x 259 mm) • Weight: 13.2 lbs.
Parts Express is authorized to ship QSC products only within the United States, and will only ship QSC products to addresses located within the USA.
