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A4390 • 500W Power Amplifier


Cat. Page 56


  • $1450.00
  • 2+ $1305.00
  • Price per each
  • Includes GST


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Last updated 20-09-18 04:20:10

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This booster is ideal for installations requiring a high power zone amplifier. Ideal for use in shopping centres, pedestrian precincts, public transport facilities and convention centres. Operates on 240V ac and 24V dc for battery backup operation. Input is via 3 pin balanced XLR (500mV). Level control is rear mounted to prevent tampering or accidental adjustment.

The circuit design includes protection features in case of output over voltage, over current and over temperature conditions. All are self resetting once the fault condition has been removed. Visual indication via front panel LEDs show amplifier status at all times. On demand fan cooling ensures reliable operation at all times.


  • Multi-stage thermally cued fan cooling
  • Input signal presence indicator
  • Output peak limited
  • 2U 19" rack mount (ears included)
  • 3 pin XLR input, 3 pin XLR loop out
  • Level control rear mounted
  • 100V, 70V and 4 - 16Ω outputs
  • Thermal and overload protection
  • 240V ac, or 24V dc operation
  • 300mA 24V battery trickle charge

100% developed, designed & assembled in Australia.
Since 1976 Redback PA products have been manufactured in Perth, Western Australia by Altronics. With over 40 years experience in the commercial audio industry, we offer consultants, installers and end users reliable products of high build quality with local product support. Read more about our Australian Made products

Backed by an industry leading 10 Year Manufacturer Warranty.
Our Redback products have a long tried and tested history of bulletproof reliability. Altronics offers a 10 Year Warranty on all Australian Made Redback products. Our local in-house service department has all the know how to answer technical queries and provide timely service. Read more about our industry leading warranty.


  • Power output: 500 watts RMS
  • Distortion: < 0.5%, @ 1kHz
  • Frequency response: 50Hz - 15kHz, -3dB
  • Output line: 100V, 70V, or 4 - 16Ω
  • Signal to noise ratio: (peak limiting by-passed) > 90 dB
  • Line output: 600Ω balanced, 0dBV, 3 pin XLR
  • Speaker connection: Screw terminals
  • Trickle charge: Binding posts
  • Inputs: 3 pin XLR (500mV)
  • 24V-30V dc power: Screw terminals
  • 240V ac power: IEC power connector
  • Indicators: Mains, 24V dc, Power, Signal presence, Over temp, Over current, Shut down, Peak limiting
  • Current Draw: 500mA Standby, 35A Full @ 24V dc
  • Power supply: 240V ac or 24V dc (nominal)
  • Protection: 10A ac and 2 x 20A dc
  • Dimensions: ≈ 483W x 380D x 88H

*Specifications are subject to change without notice.

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