A subwoofer is a speaker that reproduces low-frequency sounds. They are typically placed on the floor or in front of your TV, and there are many budget subwoofers at affordable prices. The first thing you need to do is find a good place for the subwoofer. It should ideally be placed between 6 and 12 inches from any walls or furniture, so it doesn’t get muffled by them when playing bass sounds (or anything else).