Best Buy: Pioneer 12" 1400 W Max Power, Single 4Ω Voice Coil, IMPP™ cone, Rubber Surround Component Subwoofer Black TS-A120S4E
Pioneer 12" 1400 W Max Power, Single 4-ohm Voice Coil, IMPP™ cone, Rubber Surround Component Subwoofer BLUE TS-A123R - Best Buy
Pioneer TS-1200M 12" - 1400 W Max Power, Single 4Ω Voice Coil, IMPP™ cone, Rubber Surround | Component Subwoofer - Walmart.com
Amazon.com: Karaoke Machine for Adults & Kids, VeGue Bluetooth Speaker PA System with 2 Wireless Microphones, 10'' Subwoofer, Disco Ball LED Light, Singing Machine for Home Karaoke, Party, Church (VS-1088) : Musical
Pioneer A-Series 10 in. Subwoofer with Dual Voice Coils TS-A250D4 - The Home Depot
Amazon.com: BOSS Audio Systems BE423 Rage Series 4 Inch Car Door Speakers - 225 Watts (Pair), 3 Way, Full Range, Tweeters, Coaxial, Sold in Pairs, Bocinas para Carro : Electronics