Amazon.com: PreSonus ULT18s 18" Active Subwoofer : Musical Instruments
Amazon.com: Sound Town 2000W 18" Active Powered Subwoofer with 2 Speaker Outputs, DJ/PA Pro Audio Sub with 4" Voice Coil, White (CARPO-18SWPW) : Musical Instruments
Amazon.com: Rockville PA System w/ 15" Speakers+18" Subwoofers+15" Monitors+Stands+Cables : Musical Instruments
Amazon.com: QSC KLA181 Active 18" Line Array Subwoofer Black : Musical Instruments
Amazon.com: Gemini Sound ZRX-S18P 18" Inch Woofer Professional DJ PA Systems Active Powered Subwoofers with 1600W Watts Class D Digital Power, 3" Voice Coil, Line/Link in XLR Connectors : Musical Instruments
Amazon.com: Pyle 8-Inch Low-Profile Amplified Subwoofer System - 600 Watt Compact Enclosed Active Underseat Car Audio Subwoofer with Built in Amp, Powered Car Subwoofer w/Low & High Level Inputs PLBX8A : Electronics
Amazon.com: PRORECK Club 4000 18-inch 4000W P.M.P.O Stereo DJ/Powered PA Speaker System Combo Set Line Array Speaker and 18 inch Active Subwoofer with Bluetooth/USB/SD Card/Remote Control : Musical Instruments
Amazon.com: Sound Town 2000W 18" Active Powered Subwoofer with 2 Speaker Outputs, DJ/PA Pro Audio Sub with 4" Voice Coil, White (CARPO-18SWPW) : Musical Instruments