6 MICS & 2 AUX Inputs: These are provided with individual volume controls. Aux-1 & Aux-2 are alternate to Mic-5 and Mic-6.
Line Output: This jack offers 1 V/1 K Ohms output for connecting to Line Input of a Booster Amplifier or any other amplifier.

Line Input: This jack permits connecting output from any exeternal Mixer permitting SSA-250 M be used as a Booster Amplifier.
Pre-Amp Output: This jack is for connecting to Cassette Recorder for recording the overall program.

Box Speaker/Driver Unit Selector Switch: When switched to Driver unit position. The filter circuit protects the diaphragm of the Driver Units from damage.
24V DC ensures uninterrupted operation for continuity of program in case of AC power failure.