- 6 Mic and 2 Aux Inputs.
- PRE-OUT & LINE OUT for connecting to a Booster Amplifier and for recording.
- LINE IN for connecting the output from any external mixer or permitting SSA-250UBR to be used as Booster Power Amplifier.
- Resettable circuit breaker for protection against overload and short circuit.
- Instant transfer to DC power (Car Battery) if AC power fails.
- Box Speaker/Driver Unit selector switch. Bass boost defeated at Driver Unit position for safer operation of driver units.
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