250 Watts. Ac & 24 DC operating for Public Address Systems 6 mic & 2 aux input Preamplifier and line output for connecting to a booster amplifier and for recording the programme. Line output for connecting the output from any external mixer or permitting SSA-250 to be used as a booster power amplifier. Resettable circuit breaker for protection against overload and short circuit. Instant transfer to DC power (Car battery) if AC power fail. Box speaker/driver unit selector switch. Bass boost defeated at driver unit position for safer operation of driver units.