Quest Engineering QA4004

Power Amp 2 x 1700w @ 4ohm, with Crossover / Filters – 3U

Our price:$2,445.00 GST
Order Code: QA4004

Available on backorder

Like all members of the Quest QA series amplifiers, QA4004 has got a low pass (80hz, 110hz) and high pass (35hz, 80hz) set of filters, so you can pop one of these on your subs (or mid-highs) and create a simple multi-way PA system without the need for a dedicated external crossover.

However, that’s where the similarity stops. Apart from being 3U rather than the 2U size of the others in the series, this amp is a brute and its supreme horsepower is matched also with some extra kilos.

Power Output:
2 x 1700w @ 4 ohm
2 x 990w @ 8 ohm

Weight: 35kg
Height: 3U


  • 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 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.
2x 1700-w at 4Ω
Rated Power (2x 8Ω): 993-W per channel @ 1kHz at <0.05% T.H.D. both channels driven
Rated Power: (2x 4Ω): 2400-W per channel @ 1kHz at <0.05% T.H.D. both channels driven
T.H.D: <0.5%@400-W per channel from 20 HZ to 20kHz
Minimum Load Impedeance: 2Ω – Audio signal / 4Ω – Signal wave
Phase Response: +20 to -25  from 20 Hz to 20kHz
Input Impedance: 20 kΩ, balanced; 10 kΩ, unbalanced
Cooling: 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 @ 0.775-V: 38 dB or 32 dB
Crosstalk: >-60 dB @ 1kHz at rated power @ 8Ω
Hum and Noise: >-107 dB, “A” weighted referenced to rated power @ 8Ω
Slew Rate: >44V/us
Damping factor (8Ω): >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): 132 mm x 483mm x 496mm
Net Weight: 35kg
Packaged Shipping Weight: 38kg