Australian Made

This 250 Watt 3 channel mixer amplifier is specifically designed for applications requiring up to three microphone inputs, without compromising output power and overall performance. The amplifier feature three inputs which can be configured for either microphone or line level operation.

Public Address Amplifier (PA) 250W 3 Input

Name: Public Address Amplifier (PA) 250W 3 Input
SKU: A4387A
Price: 1177.27 AUD
Availability: InStock

by: Redback

SKU: A4387A

This 250 Watt 3 channel mixer amplifier is specifically designed for applications requiring up to three microphone inputs, without compromising output power and overall performance. The amplifier feature three inputs which can be configured for either microphone or line level operation.

$1,177.27

All Prices Shown are (ex GST)

Bulk Pricing

ea	$1,177.27
2+	$1,082.27

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Overview
Details
Warranty
Downloads

Overview

The Redback A 4387A 250 Watt 3 channel mixer amplifier is specifically designed for applications requiring up to three microphone inputs, without compromising output power and overall performance. The amplifier features three inputs which can be configured for either microphone or line level operation. Frequency response extends from 50Hz to 15kHz ±3dB at a total harmonic distortion (THD) of less than 0.5% @ 1kHz.

Vox muting is provided on inputs one and two, which, when activated, automatically mutes the other inputs. Bass and treble controls and phantom powering capability enable unparalleled flexibility for a wide scope of applications such as factories, workshops, mine sites, sports clubs and office buildings.

The amplifiers operate from 240V AC mains or 24V DC permitting battery backup operation during mains power failure. The output comes standard suitable for a 100V line load, but this can be configured internally to 70V line or low impedance (4 - 16Ω) loads.

Thermal overload, overcurrent and overload protection circuitry and fuses on both AC and DC provide excellent fault condition protection and robust performance. The amplifier also utilises a half power mode which enables the amplifier to continue to run at a reduced output level if it is being over driven.

Tape output sockets are provided for recording purposes or feeding into additional power amplifiers.

Remote volume available when A 4373 Digital volume control module fitted internally and external A 2280B wall plate or 1KΩ potentiometer connected.

Alert and Evacuation tones (conforming to AS1607.4) along with chime tones and voice over message option available when optional A 4573 fitted.

Features:

3 Balanced microphone inputs / 3 Aux inputs / 1 Music input
Robust design incorporating latest Mosfet technology
Very Low noise and distortion
100V standard with optional 70V and 4-16Ω outputs
240V AC or 24V DC operation
VOX muting on inputs 1 and 2 (Switch selectable internally)
Adjustable VOX level sensitivities
Bass and Treble controls
Tape Output
Phantom power on microphone inputs (DIP switch selectable internally)
Multi stage thermally cued fan cooling
Output Peak Limited
Thermal Overload protected
Signal Presence Indicator
Half power mode when overdriven
Fault Indicators
24V DC Power Status Indicator
Optional Alert/Evac module with voice over message for emergency tones (A 4573)
Optional remote volume (With A 4373 Digital volume control module fitted and external A 2280B wall plate)
Rack Mountable (suits 19 inch racks) with optional A 4376 rack ears

Specifications:

Power Outputs:

Power: 250 watts RMS

Distortion: < 0.5%, @ 1kHz

Output line: 100V

Frequency Response:

Mic inputs : 50Hz - 12kHz, -3dB

Line inputs: 50Hz - 15kHz, -3dB

Mic Sensitivity:

Mic inputs: 3mV

Line inputs: 1V

Music input: 500mV

Signal To Noise Ratio:

Mic inputs: > 75dB below rated output

Output Connectors:

Speakers: Screw terminals

Tape Output: Unbalanced dual RCA (mono), line level

Input Connectors:

Inputs: 3 pin XLR balanced or 2 x RCA

24V DC power: Screw terminals

240V AC power: IEC power connector

Muting:

PTT via microphone switch contacts and VOX muting (inputs 1-2)

Controls:

Mic/Line/Music inputs: Volume

Power: On/off switch

Indicators: Power, signal present, output peak limiting, over-temp , overload protect, half power, 24V DC

General:

Power Supply: 240V AC or 24V DC

Fuse Protection: 250W - 7.5A AC ,20A DC

Dimensions: ˜483W x 300D x 88H

Weight: ˜ 15.5kg

Current Draw: Min ˜ 350 mA, Max ˜ 20A

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.

100% developed, designed & assembled in Australia.

Since 1974 Redback PA products have been manufactured in Perth, Western Australia by Altronics. With over 50 years experience in the commercial audio industry, we offer consultants, installers and end users reliable products of high build quality with local product support.

Details

Products specifications

Warranty	10 Years
Professional Audio
Type	Mixer PA Amplifiers
Output	100 Volt Line Amplifiers, Stereo Amplifiers

Warranty

WARRANTY

We offer 10 Years warranty on this product from its date of purchase. This is available from Altronics stores, online purchases or Altronics resellers. In accordance with our full warranty terms we will repair, replace or refund if goods you have purchased from us are defective.

30 DAY MONEY BACK GUARANTEE

Not withstanding our warranty policy, if you are dissatisfied with our goods or service you may return the goods within 30 days of our despatch date. Simply contact us for a return authorisation number and we will refund your purchase in full, less transport costs on receipt of goods. All returned goods must be in as sold condition including all packaging, instructions, invoices etc.

Downloads

Instructions

PDF

Output Wiring Conversion

PDF

Brochure

PDF

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