Crown Audio 180A 80 Watt Commercial Grade Amplifier Designed for commercial and industrial use Ideal for paging, background music80 watt power amp with 4-ohm, 70V or 100V operationVolume, bass (100Hz) and treble (10kHz) controls Output current limiting, DC protection, circuit breaker/fuse and thermal protection 3 Year, no-fault, fully transferable warrantyIncludes detachable rack ears with screws, non-touch cover for output connectors, spade lugs, Phoenix-type connectors and power cord