Use RCA cable or subwoofer cable to connect from the Sub Out or LFE Out on your receiver, preamplifier or amplifier to the subwoofer input jack. Turn the subwoofer On on your receiver or preamplifer menu. Connect using speaker-level connections.

How do you hook up an active subwoofer to a stereo amp?

While a powered subwoofer (active subwoofer) does not need to be connected to an amplifier since its amp is built-in, you can connect a powered sub to an amp for data transmission only. To do this, connect the two with RCA cables and plug the powered sub into the wall for its power source.