Qx-280 series owner’s manual.
1 product overview the qx-280 series amplifiers are a high channel density, 1ru, high fidelity solution for high and low impedance distributed audio systems. Available as a single, two or four channel variant; the qx-280 series is the ideal component for audio visual installations, multi-channel sys...
2 • when cleaning the unit, ensure it has been disconnected from any power source and that only a dry cloth is used. Do not use any aerosol or liquid based cleaners. • ensure all electronics are electronically grounded (earthed) to a safety ground terminal in order to avoid electric shock. Do not gr...
3 rear panel connections & controls (per channel) front panel controls (per channel) audio signal indicator amplifier clip indicator limiter active indicator amplifier protect indicator amplifier power indicator rotary gain control 1 2 3 4 5 6 cooling fan exhaust speaker output connector 80hz high p...
4 input signal wiring examples amplifier wiring examples 70/100v system (example shows 30w tap settings) parallel wiring 16Ω 16Ω 16Ω 16Ω + - + - 15w 15w 15w 15w 16Ω 16Ω 16Ω 16Ω + - + - 15w 15w 15w 15w from amplifier to speakers 16Ω 16Ω 16Ω 16Ω + - + - 15w 15w 15w 15w 16Ω 16Ω 16Ω 16Ω + - + - 30w 30w ...
5 front panel led indicators audio signal is present this led will illuminate when the amplifier detects an audio signal. Amplifier channel is clipping if the amplifier is clipping, this led will illuminate. Limiter is active when the amplifier reaches the point of clipping, the limiter led will ill...
* all specifications were measured at 240vac ** quest engineering reserves the right to make changes in specifications, or products without prior notice. *** the figures shown above are ‘real world’, usable specifications and are conservative as a result. Quest engineering does not believe in portra...
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