The Quest QA4004 amplifier has been designed and engineered to a standard not only more than adequate for any demanding installation, it will handle a touring environment with military endurance.

As with all Quest Engineering products it's not looks alone, the design emphasis is on good sonic performance and long life span under professional conditions.

• Input Stage - Parallel XLR inputs and low noise gain stage, silent switch on/off circuitry reduces potential speaker damage in the event of intermittent power.


• Power Supply - The high current power supply is manufactured to function reliably at high temperatures and well exceeds industry standards. This results in smooth bass response and considerable dynamic headroom.


• Industrial Spec Fans - Dual heavy duty cooling fans guarantee long life of all electronic components


• Speakon Connections - International AES standard Speakon connectors wired for two channel and Bridge mono operation simplify speaker connections


• Limiter - A switchable high speed limiter acts as a final speaker protection but can be disconnected where sensing speaker system controllers are required


• Built in Switch-able X-overs - High and low pass filters on each channel make the versatile QA series even more flexible with a sub-mid/high frequency dividing network


• Selectable Gain Settings - Adjustable input switching for 1.4V, 32 dB or 26 dB make system calibration easy



• Easy Access Air Filters - User serviceable air filters are easy to maintain for trouble free operation.



• Built to Last - Heavy gauge welded steel chassis with vibration proof fittings and an emphasis on over engineering guarantees years of trouble free service in demanding environments.

Specs

• Rated Power (2 x 8 Ohms): 1,090 W per channel @ 1 kHz at  <0.05% T.H.D. both channels driven
  



• Rated Power (2 x 4 Ohms): 2,000 W per channel @ 1 kHz at <0.05% T.H.D. both channels driven


• THD: >0.5% @ 400 W per channel from 20 Hz to 20 kHz


• Minimum Load Impedance: 4 Ohms – Sign wave


• Phase Response:  +20 to -25 from 20 Hz to 20 kH


• Input Impedance: 20k Ohms, balanced; 10k Ohms, unbalanced


• Cooling:  Two temperature dependant variable speed 120mm high output DC fans


• Controls: Two front panels attenuators, rear panel mode switch and gain select switch


• Hi Pass: Linkwitz-Reily (24 db/Octave): Off/35/80 Hz


• Low Pass:Linkwitz-Reily (24 db/Octave):  Off/80/110 Hz


• Voltage Gain @ 0.775: 38 dB or 32 dB


• Crosstalk: >-60 dB @ 1 kHz at rated power @ 8 Ohms


• Hum and Noise: >-104 dB,  “A” weighted referenced to rated power @ 8 Ohms


• Slew Rate: >44V/us


• Damping Factor (8 Ohms):  >800:1 @ 20 Hz - 1 kH


• Protection: Thermal, DC, turn-on bursts, subsonic, incorrect loads


• Connectors: XLR, Speakon speaker output, 240/230 V 20 amps IEC mains


• Construction: Cold Steel Rolling + Machined aluminium front panel


• Dimensions: 132 x 483 x 496 mm


• Net Weight: 35 kg


• Packaged Shipping Weight: 38 kg