A Closer Look
The QX-280 range consists of three, separate 280 Watt per channel models, available as single, two channel, and four channel variants.
Audio quality is studio class in both high and low impedance operation. High quality class D amplifier technology makes it possible to have a compact single rack format with the right combination of power and channel density.
The transformerless outputs deliver full range audio to all impedance loads from 4Ω to 70/100V systems. Each amplifier channel has a selectable 80 Hz high-pass filter (selectable via a swith located on the rear panel), and a volume control for each channel that can be accessed directly from the front panel. Each amplifier channel is also provided with a thermally controlled cooling fan.
Whether awake or asleep, the QX-280 amplifiers are not hungry for power. The amplifier functions across the power range at an 89.5% efficiency rate.
With a sleep mode mains current draw of less than 0.5 watts per amplifier channel. This is a great benefit for venues with a high amplifier channel count.
The automatic standby functionality mutes an individual amplifier channel after no signal has been detected for 10mins or more; and will put the amplifier into sleep a mode after 30mins. Automatic standby can be turned on and off for individual channels via a switch located on the rear panel.
The operational voltage range of the QX-280 Series is also wide – from 85 to 265VAC, and no manual switching is required for high and low impedance operation. This is a great reliability benefit for installations subject to inconsistent mains supply.
- High Efficiency Class-D Amplifier(s)
- 70/100V or Low Impedance Operation
- Compact 1RU Chassis
- Auto-Sleep Function
- Selectable 80Hz High Pass Filter
- Built-In Limiter Circuit
- Thermally Controlled Fans
- AC power range 85-265VAC 50/60Hz.
- ErP (1275/2008/EC) compliant standby consumption < 0.5W (*per channel)
- Available in 1, 2 or 4 Channel Models
|Peak Output Current||25A|
|THD+N (1kHz @ 1W / 1kHz ½ Rated Power)||0.022% / 0.015%|
|Output Resistance (1kHz)||43.6mΩ|
|Peak Output Voltage (unloaded)||±140V|
|Frequency Response||±0.1dB 20Hz – 20kHz (1st order 22kHz LPF)|
|Voltage Gain (@ 1kHz)||32dB|