Phase5 Public Address Mixer Amplifier 125W 3 Input

The Redback A 4377A 125 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. Dimensions: ≈483W x 300D x 88H.

The A 4377A conservatively delivers 125W RMS power. 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.

Key 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: 125 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
Line Output: 600Ω balanced, 0dB , 3 Pin XLR

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, VOX muting (inputs 1-2)

Controls
Mic/Line/Music inputs: Volume
Power: On/off switch
Indicators: Power, signal present, output peak limiting, overtemp ,Overload Protect, Half Power, 24V DC

Power
Power Supply: 240V AC or 24V DC
Fuse Protection: 125W - 5A AC ,10A DC, 250W - 7.5A AC ,20A DC

Mechanical
Dimensions: 483W x 300D x 88H