Altronics Redback A 4046A Operating Instructions - Page 2

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REDBACK 40 Watt Public Address Amplifier

Congratulations on purchasing a REDBACK PA Amplifier. This Public Address Amplifier has been engineered and

manufactured to a very high standard in Australia.

Features:

• 4 balanced microphone inputs / 4 aux inputs

• Phantom powering on mic inputs 1-4

• Wide frequency response 50Hz-15kHz, ±3dB

• Very low noise and distortion

• Tape out

• 100V, 70V and 4-16 Ohm outputs. (Note: 70V output not available on

A 4036A)

• 240V AC or 24V DC operation

• Bass and treble controls

• Evacuation tones via optional A 2073 evac module.

• Remote volume via optional 1K potentiometer.

• Desk or rack mountable

• Thermal overload protection

Microphones must be connected to the appropriate XLR input. Other "line level" music sources should be connected to

the RCA auxiliary inputs, e.g. tape players, CD players, etc. Each auxiliary input has stereo connections, which are

converted to mono internally.

Microphone Phantom Power Option

This facility is available on all microphones. Phantom powering can be turned on or off via internal PCB mounted

jumpers. To change the jumper settings, the lid of the amplifier must be removed. (Ensure power is dis-connected

before removing the lid). Locate the jumpers (on the circuit board, see fig 2) and select the option as indicated on the

circuit board. This option is set off at the factory.

Tape out: This is a line level output. Its output is affected by adjusting the volume on any input.

Vox muting: Available on inputs 1 and 2. Once activated (see fig 2) input 1 will override all other inputs including the

alert/evac input. Input 2 will override inputs 3 & 4. Both mic and aux inputs will activate the vox muting. These are

factory set in the OFF position.

When installing the amplifier attention must be given to the following points.

• Make sure that the total speaker load on the amplifier does not exceed its rating (40W A 4036A, 60W A 4041A, 100W

A 4046A). Don't connect 8 ohm speakers to the 100V line output, this will severely overload the amplifier.

• Allow ventilation so that the amplifier can "breathe" i.e. don't enclose in a sealed cupboard. Allow air to circulate

through the amplifier.

Alert/Evac option: Generates chime, alert and evacuation tones. Simply connect the alert/evac module (Altronics P/N:

A 4573) to the amplifier internally via IDC cable provided. Refer to fig 2 for connection location. Once activated the

A 4573 will mute inputs 2, 3 and 4.

Remote volume option: Master volume can be adjusted by a remotely located volume control (Maximum distance

100m). This requires a two wire figure 8 cable and a 1K potentiometer (Altronics P/N: R 2202 or Altronics remote

wallplate P/N: A 2280B). This is connected to the two way connector on the rear of the amplifier (fig 2).

Page 2

OPERATION

OPTIONAL EXTRAS

A 4036A / 41A / 46A Rear Panel

Fig1:

Pinouts of XLR Socket

(Looking at mic inputs rear of unit)

1. Earth/Shield

2. Signal Hot

3. Signal Cold