This circuit is Protection circuit to prevent the speaker from DC output from Power Amplifier, normally, DC will be the cause of damaged Speaker. Most of OCL power amplifier , recommend to use this board to protect your lovely speaker.

Technical information:
   - Need Power Supply 12V DC
   - 2 x Relay 12V/10A to connect between speakers and stereo amplifier.
   - LED indicator
   - Current consume 60mA
   - Pot to adjust delay time to connect output of amplifier to the speakers. ( 1-5second ) after turn on amplifier.
   - Including the schematic , the instruction how to setup.
   - PCB size 3.24 in x 1.84 in

Download User Manual