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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 systems, or distributed consumer/commercial applications. The trans-
formerless speaker outputs deliver full range audio to all impedance loads from 4
Each amplifier channel has a switchable 80Hz 4th order Butterworth High-Pass filter located on the rear of
the amplifier, and a volume control that can be accessed directly from the front panel.
Each channel also includes a selectable Automatic Standby function. This is located on the rear of the
amplifier, and will mute that particular channel after 10mins of no audio signal presence. After 30mins that
channel will enter a sleep mode, which allows individual channels to draw less than 0.5W of mains power.
Safety Precautions
• Please read the instructions in this section carefully before use.
• Ensure all instructions in this manual are observed as all information contained within is very important.
• It is also highly recommended that this manual is retained for future reference.
Safety Symbol & Message Conventions
The safety symbols described are used in this manual to prevent bodily injury and property damage which
could result from mishandling. Before operating this product, please read this manual first, in full so you
that you are thoroughly aware of any risks.
WARNING
1
Indicates a potentially hazardous situation which, if
mishandled, could result in serious personal injury or death.
up to 70/100V systems.
Ω
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