I have no idea what's happening when you push the button for a second set of speakers. If you did that with nothing connected on #2, and the amp connects them in series, you'd get no sound. Weird problem, dirty relay or something.
Twisting the wires and hooking the sub and the speakers up to #1 would be best. Connecting the speakers to high level out on the sub would be good too. The amp in the sub does not drive the speakers, it's simply a pass through.
A couple tips, instead of maxing all the sliders on the eq out, set them to the middle. Turn the loudness off. Then play with the eq as needed to tweak your sound.
Twisting the wires and hooking the sub and the speakers up to #1 would be best. Connecting the speakers to high level out on the sub would be good too. The amp in the sub does not drive the speakers, it's simply a pass through.
A couple tips, instead of maxing all the sliders on the eq out, set them to the middle. Turn the loudness off. Then play with the eq as needed to tweak your sound.
