My receiver doesn't have a dedicated subwoofer... (by 2 users)

get a active sub and use an audio splitter on the input..

Yes, as long as the subwoofer has speaker-level inputs and outputs. You can hook up this type of subwoofer in line between your receiver and main stereo speakers. Run one set of speaker wires from the receiver's "A" speaker outputs to the subwoofer, and then run another set of speaker wires from the subwoofer to your main stereo speakers.