This is not a standard amp, it’s an amp specifically to drive a subwoofer. Not standard stereo speakers.

There is a standard rca input for those using a stereo amp with a subwoofer/pre out and a high level in & out for those who don’t, making it possible to add a subwoofer to any audio system.

The amp is a good condition with a couple of small scratches (photos provided). It has a trigger and out to prevent you from having to turn it on manually. Do note that when using the amp if the sound coming from the main amp is too low, the sa230 will not function. The light will stay red and not turn blue.