I have an older power amp for my subwoofer that I'm about to wire up.
Unfortunately I lost the owners manual. I know it can be bridged but my
dilemma is how to bridge it. My understanding is that bridging means running
off the positive output of one side and the negative of the other. Yet on
the amp itself it says "MONO - " pointing to the right positive ( red )
connection and "MONO +" pointing to the left positive ( red ) connection. It
seems that to bridge it you have to wire up to the positive of each channel.
I thought it was the positive of one channel and the negative of the other
channel. The amp is an old Sherwood SCA-2100.

Any ideas would be greatly appreciated. Thanks!