Ideally you want a sub out. Rel subs have a high level input that taps off the speaker connection right at the amp (or integrated). There may other sub manufacturers that have a similar high level input.
Connecting a subwoofer.....
What is the difference between using pre-out (if your amp has one) and using line level outputs when hooking up a sub in a two channel system for music only?I know there are a lot of "do's" and "dont's" when connecting a sub and it all has me a bit confused. For instance, I just read someone recommending using a "Y" splitter for the cables and Simaudio told me this morning that if I were to attempt this it would definitely damage the amp.