QX-280 Series Corporate Power amplifiers
Made in Australia
Like all Quest products, the QX-280 Series is made to survive in a tough world.
Australian QC and advanced design engineering mean years of trouble free service in professional applications.
The QX-280 Series provides a price/performance ratio thatis hard to beat.
Studio quality sound and plenty of channels - the QX-280 Series is available in a wide range of single and multi-channel configurations.
Specifically designed for AV installations and high endcommercial sound, where hi-fidelity audio is required.
Powered with the latest in high quality, energy efficient, Class D amplifiers;
the QX-280 Series amplifiers can be integrated into both low impedance, and 70/100V line installations without compromise
A Closer Look
The QX-280 range consists of three separate models.
- QX1280 - single channel x 280 Watt
- QX2280 - two channels x 280 watts
- QX4280 - four channel x 280 watts
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 toall 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 rearpanel), 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.
Features
- 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
Energy Conserver
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 modeafter 30mins.
Automatic standby can be turned on and off for individualchannels 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.
Specifications
| 25A |
- THD N (1kHz @ 1W / 1kHz ½ Rated Power)
| 0.022% / 0.015% |
| 119dBA |
| 43.6m ohm |
- Peak Output Voltage (unloaded)
| ±140V |
| 4 ohm | 280W |
| 8 ohm | 245W |
| 70V | 250W |
| 100V | 240W |
| ±7mV |
| ±0.1dB 20Hz - 20kHz (1st order 22kHz LPF) |
| 32dB |
| Mechanical Specifications |
| QX1280 - 4.5kg | QX2280 - 4.9kg | QX4280 - 5.7kg |
| QX1280 - 7.1kg | QX2280 - 7.5kg | QX4280 - 8.3kg |
| 44 x 485 x 304mm |
| 3-Way 5.08mm Captive Screw Connector |
| 2-Way 5.08mm Locking Captive Screw Connector |
| IEC C14 |
| 85 - 265VAC |
* 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 portraying misleading or exaggerated specifications.