A 4437 • 4 Input Mixer With Fire Muting

Many large commercial buildings these days employ two PA systems. One is the traditional PA/BGM system for every day paging and music distribution. The second is a stand alone emergency evacuation PA system for use in the event of a fire or other emergency. This mixer has been designed for such installations.

It works as a stand alone audio processor with four mic/line inputs for microphone and music sources. Plus it has a set of contacts connected to the buildings Fire Indicator Board (FIB). When the FIB operates it triggers these contacts, rending the local PA/BGM system inoperative so the main emergency evacuation system has precedence.

All inputs can be configured for either balanced mic via 3 pin XLR or line inputs via RCA. Line input sensitivity is adjustable from 100mV to 1V using rear mounted DIP switches. Phantom power is also available on all inputs. Outputs are either balanced 3 pin XLR or stereo RCA connectors.

Individual & master level controls are provided on the front panel along with recessed treble and bass adjustments.

Provision is included for the A4573 alert/evac module which  generates pre chime, bell, alert and evacuation tones.  The alert tone can function continuously, or switch to evac tone after a preset time delay (adjustable 30 seconds to 4.5 minutes).  Simply connects to the mixer internally via the cable provided.

Features

• 4 mic or line inputs
• Balanced line or RCA outputs
• VOX priority on input 1 and 2
• Phantom power ON/OFF for mic inputs
• Remote evacuation system muting contacts
• 24V DC operation
• Individual volume, treble and bass for all inputs
• Provision for A4573 alert evac tone generator module

Developed, designed & assembled in Australia.
Since 1974 Redback PA products have been manufactured in Perth, Western Australia by Altronics. With over 45 years experience in the commercial audio industry, we offer consultants, installers and end users reliable products of high build quality with local product support.