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Quest - QA1004 - 2 Channel Amplifier

Quest - QA1004 - 2 Channel Amplifier

Quest Engineering
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QA Series?Power Amplifier

QA1004?[2x 575w @ 4?] ??QA2004?[2x 870w @4?] ??QA3004?[2x 1100w @ 4?] ??QA4004?[2x 2000w @ 4?]



Quest QA Series power amplifies are built to work hard in the tough environment of pro audio. Industrial spec multi-speed fans and generous heat sinks will keep the output stage cool even if the amplifier is installed in a dusty and poorly ventilated area.

Service and maintenance is easy as the internal architecture is laid out for easy access by a qualified technician. The sonically superior output stage is composed of a generous abundance of output devices for greater electronic stability and sonic fidelity.

QA series amplifiers are manufactured to a standard accepted as desirable practice for a concert standard power amplifier. Heavy gauge welded 16-gauge steel chassis with vibration proof fittings, and an emphasis on over-engineering, guarantees years of trouble-free service in the most demanding environments.

Quest set about a design and layout for easy service, not easy manufacture. A minimum of disassembly is required for testing and maintenance meaning lower operating costs and longer amplifier life.



  • Input Stage: Pro active protection senses stages of system function to safeguard your investment both on turn on and while under operation. 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.
  • Input Connection: XLR parallel male and female input connections calibrated for most pro spec system controllers and electronic cross-overs. features
  • Speakon Connections: International AES standard Speakon connectors wired for two channel 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 switchable X-overs: High Amplification 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 0.775V, 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.



? QA1004 QA2004 QA3004 QA4004
? 2x 575-w at 4? 2x 870-w at 4? 2x 1100-w at 4? 2x 2000-w at 4?
Rated Power?
(2x 8?):
290-W?per channel @ 1kHz at <0.1%?T.H.D. both channels driven 490-W?per channel @ 1kHz at <0.1%?T.H.D. both channels driven 660-W?per channel @ 1kHz at <0.05%?T.H.D. both channels driven 993-W?per channel @ 1kHz at <0.05%?T.H.D. both channels driven
Rated Power:
(2x 4?):
575-W?per channel@ 1kHz at <0.1%?T.H.D. both channels driven 870-W?per channel @ 1kHz at <0.1%?T.H.D. both channels driven 1100-W?per channel @ 1kHz at <0.05%?T.H.D. both channels driven 2400-W?per channel @ 1kHz at <0.05%?T.H.D. both channels driven
T.H.D: <0.1%@250-W per?channel from 20 HZ to 20kHz <0.1%@400-W
per?channel from 20 HZ to 20kHz
<0.5%@400-W per?channel from 20 HZ to 20kHz
Phase Response: +5 to -15?from 20 Hz to 20kHz +20 to -25??from 20 Hz to 20kHz
Input Impedance: 20 k?,?balanced; 10 k?, unbalanced
Cooling: Two temperature?dependant variable speed?80mm high-output DC fans Two temperature?dependant variable speed?120mm high-output DC fans
Controls: Two front panel?attenuators, rear panel mode switch and gain select switch
High Pass: Linkwitz-Reily (24?dB/Octave): Off/35/80 Hz
Low Pass: Linkwitz-Reily (24?dB/Octave): Off/80/110Hz
Voltage Gain @?
?29 dB or 24 dB 32 dB or 26 dB 35 dB or 29 dB 38 dB or 32 dB
Crosstalk: >-60 dB @ 1kHz?at rated power @ 8?
Hum and Noise: >-105 dB, "A" weighted?referenced to rated power @ 8? >-107 dB, "A" weighted?referenced to rated power @ 8?
Slew Rate: >30V/us >40V/us >44V/us
Damping factor (8?): >500:1 @ 20Hz - 1kHz >700:1 @ 20Hz - 1kHz >800:1 @ 20Hz - 1kHz
Indicator LEDs: Two clip, two?signal presence, one active?status, two protection
Protection: Thermal, DC, turn-on?bursts, subsonic, incorrect loads
Connectors: XLR . Speakon .?240/230 Volt 16 amp IEC mains
Construction: Cold Steel Rolling +?Machined aluminium front panel
Dimensions (HxWxD): 89mm?x 483mm x 496mm 132?mm x 483mm x 496mm
Net Weight: 17kg 21kg 23kg 35kg
Packaged Shipping Weight: 20kg 23kg 26kg 38kg