Small Subwoofer BUILD - Plays down to 33Hz!! - by SoundBlab - YouTube
Amazon.com: Polk Audio PSW111 8" Powered Subwoofer - Power Port Technology | Up to 300 Watt Amp | Big Bass in Compact Size | Easy Setup with Home Theater Systems Black : Everything Else
V12 Compact Subwoofer - M&K Sound® | Official Site
Alpine | PWE-S8 | Compact 8" Powered Subwoofer
Stream best car subwoofer for deep bass - ts swx2502 - compact subwoofer by Julia Watsica | Listen online for free on SoundCloud
MTX TN8MS Terminator Series 8" compact powered under-seat subwoofer enclosure at Crutchfield