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.
Warranty: 2 Years
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
To download the QA Series User Manual please click here.
We charge just a $15 per order (capped at $22) flat rate for express shipping*. This covers one delivery attempt so please provide an address where someone is available to sign for courier delivery between 9am and 5pm weekdays. You can instruct us to ask the courier to leave your parcel unattended in a safe place, although please be aware that if anything happens to the parcel, neither us nor the courier company can be held responsible. Work addresses are a great delivery option. If using a work address please include the business' name.
* for some larger items does not apply to Australian remote island locations, some mainland remote locations (outside Darwin NT and Perth WA metro areas) or outside Australia. If unsure if you are entitled to capped shipping it is best to contact us prior to placing order.
** $8 standard shipping available at checkout for orders under $50