Stereo Speaker Protection PCB

This protection board uses the Unisonic UPC1237 IC and power MOSFETS, rather than electro-mechanical relays, to switch the speakers to the amplifier output.  It is therefore extremely reliable with no wear out mechanisms as with relays, and very compact.  The board features DC offset protection, turn-on and turn-off muting for silent amplifier power-up and power down cycling along with an overcurrent input. The board handles 2 channels.