Adding a sub out to an amplifier

Adding a sub output is not the kind of work I usually do. However, I decided to give it a shot.

The item to work with is a Skytronic karaoke amplifier.

So I simply tapped the signal after the volume pot and attached it to the active subwoofer circuit I used,  I found inspiration from this circuit. Since the amplifier already had +/- 12VDC supply I did not have to use a dedicated power supply for it.

I also changed the output terminals for the speakers as requested by customer. Here’s a view from the back, with some new stuff.