About Alert/Evac Option Board For Mixers and Amplifiers (Suit A4377)

Optional Plugin Board to suit the Phase 4 range of Redback Amplifiers. It 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 amplifier internally via the cable provided.