QA Series Power Amplifier
QA1004 [2x 575w @ 4Ω] – QA2004 [2x 870w @4Ω] – QA3004 [2x 1100w @ 4Ω] – QA4004 [2x 2000w @ 4Ω]
Introduction
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.
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 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
| QA1004 | QA2004 | QA3004 | QA4004 | |
| 2x 575-w at 4Ω | 2x 870-w at 4Ω | 2x 1100-w at 4Ω | 2x 2000-w at 4Ω | |
| Rated Power (2x 8Ω): |
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 4Ω): |
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 kΩ, balanced; 10 kΩ, 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 @ 0.775-V: |
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 @ 8Ω | |||
| Hum and Noise: | >-105 dB, "A" weighted referenced to rated power @ 8Ω | >-107 dB, "A" weighted referenced to rated power @ 8Ω | ||
| Slew Rate: | >30V/us | >40V/us | >44V/us | |
| Damping factor (8Ω): | >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 |