About 18 inch Subwoofer
A speaker with an 18-inch subwoofer is essential to a surround system because it creates the low-frequency sounds that are not always broadcast by regular speakers. Passive and active subwoofers work with the bass notes to make them sound even better when listening to music or watching action-packed movies. Subwoofers are typically used in home theatre systems as well as mounted in vehicles as part of an auto sound system. Without a decent size subwoofer, a sound system is just not complete. eBay offers new and used 18-inch subwoofer speakers as well as other sizes of speakers, subwoofers, and bass bins through Top-rated Sellers. Many of these sellers offer discount prices as well as free shipping.