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Quest QA Series power amplifies are built to work hard inthe 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, noteasy 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 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 switchable X-overs:
      • High Amplification and low pass filters on each channel make the versatile QA series even more flexible witha sub-mid/high frequency dividing network.
    • Selectable Gain settings:
      • Adjustable input switching for 0.775V, 32 dB or 26dB make system calibration easy.
    • Easy access air filters:
      • User serviceable air filters are easy to maintain for trouble free operation.

    Note The QA Series Power Amplifiers are not Bridgeable



    QA1004 Stereo Power Amp

    QA2004 Stereo PowerAmp



    2x 575-w at 4O2x 870-w at 4O  
    • Rated Power
      (2x 8O):
    290-W per channel @ 1kHz at <0.1% T.H.D. both channels driven490-W per channel @ 1kHz at <0.1% T.H.D. both channels driven  
    • Rated Power:
      (2x 4O):
    575-W per channel@ 1kHz at <0.1%T.H.D. both channels driven870-W per channel @ 1kHz at <0.1% 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
    • Minimum Load Impedeance:
    2O - Audio signal / 4O - Signal wave
    • Phase Response:
    +5 to -15 from 20 Hz to20kHz 
    • Input Impedance:
    20 kO, balanced; 10 kO, unbalanced
    • Cooling:
    Two temperature dependant variable speed 80mm 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 dB32 dB or 26 dB  
    • Crosstalk:
    >-60 dB @ 1kHz at rated power @ 8O
    • Hum and Noise:
    >-105 dB, "A" weighted referenced to rated power @ 8O >-107 dB, "A" weighted referenced to rated power @ 8O
    • Slew Rate:
    • Damping factor (8O):
    >500:1 @ 20Hz - 1kHz>700:1 @ 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 . 240/230Volt 16 amp IEC mains
    • Construction:
    Cold Steel Rolling + Machined aluminium front panel
    • Dimensions (HxWxD):
    89mm x 483mm x 496mm 
    • Net Weight:
    • Packaged Shipping Weight:



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