• QA4004 stereo stiprintuvas
  • QA4004 stereo stiprintuvas
  • QA4004 stereo stiprintuvas
  • QA4004 stereo stiprintuvas

QA4004 stereo stiprintuvas

Quest Engineering
2275 €
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.

Techninė specifikacija:

2x 2000-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

<0.5%@400-W per channel from 20 HZ to 20kHz

Phase Response
+20 to -25 from 20 Hz to 20kHz

Input Impedance
20 kΩ, balanced; 10 kΩ, unbalanced

Two temperature dependant variable speed 120mm high-output DC fans

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

>-60 dB @ 1kHz at rated power @ 8Ω

Hum and Noise
>-107 dB, "A" weighted referenced to rated power @ 8Ω

Slew Rate

Damping factor (8Ω)
>800:1 @ 20Hz - 1kHz

Indicator LEDs
Two clip, two signal presence, one active status, two protection

Thermal, DC, turn-on bursts, subsonic, incorrect loads

XLR . Speakon . 240/230 Volt 16 amp IEC mains

Cold Steel Rolling + Machined aluminium front panel

Dimensions (HxWxD)
132 mm x 483mm x 496mm

Net Weight

QA4004 stereo stiprintuvas

QA4004 stereo stiprintuvas - Digital Audio

Quest Engineering
2275 €