Quest QA4004 Stereo Power Amp 2 x 1700W @ 4 ohm Quest

Quest QA 4004 power amplifiers 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.

NB. QA3004 back panel shown for display purposes

Warranty: 2 Years

Features

• 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.

Specifications

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

Downloads

Download the Quest QA Series User Manual.