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Redback® A 4235A/45A/55A PA Mixer Amplifiers
Continually Blows Fuses
Make sure that the speaker line is not shorted. Check speaker types, ratings and if on correct output.
Amplifier Keeps Cutting In & Out
Make sure that there is adequate ventilation around the amplifier. Check the vent slots on the top and sides are not
covered or blocked and the fan is functioning correctly. Check also speaker types, ratings and for any short circuits on the
speaker line.
SPECIFICATIONS
POWER OUTPUTS
A 4235A: ......................................................30 watts RMS
A 4245A: ......................................................60 watts RMS
A 4255A: ....................................................100 watts RMS
Distortion:..................................................< 0.5%, @ 1kHz
FREQUENCY RESPONSE
Mic input:..............................................50Hz - 12kHz, -3dB
Line input: ............................................50Hz - 15kHz, -3dB
SENSITIVITY
Mic input: ................................................3mV-2V balanced
Line input:.........................................................300mV - 1V
Aux inputs: ..................................................... 300mV - 1V
3.5mm input: ......................................................... 600mV
SIGNAL TO NOISE RATIO
Mic input: .................................> 75dB below rated output
Line input:.................................> 81dB below rated output
A 4230A
30W Public Address Amplifier
A 4240A
60W Public Address Amplifier
A 4250A
100W Public Address Amplifier
4
Redback® Proudly Made In Australia
*Specifications subject to change without notice
Other 1RU Amplifiers in this range
Phone: 1300 780 999 Fax: 1300 790 999 Internet: www.altronics.com.au
OUTPUT CONNECTORS
Speakers: ....................................................Screw terminals
INPUT CONNECTORS
Input1: ................................3 pin XLR balanced or 2 x RCA
Input2: .........................................3 x RCA and 3.5mm Jack
24V DC power: ..........................................Screw terminals
240V AC power: ............................... IEC power connector
WEIGHT
A 4235A: ................................................................ ≈4.5kg
A 4245A: ................................................................ ≈5.5kg
A 4255A: ................................................................ ≈6.0kg
DIMENSIONS: .................................≈ 483W x 210D x 44H
Distributed by Altronic Distributors Pty. Ltd.
User manual revision number: 1.2 20/04/2021
www.redbackaudio.com.au
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