Hidove Subwoofer Amplifier Board,WiFi & Bluetooth Home Audio Amplifier Board for DIY Speaker Kit.Wireless Connection Multiroom/multizone Sync Play for Airplay DLNA - Up2stream Amp Sub - Walmart.com
PreSonus Temblor T10 Powered Subwoofer with Eris E3.5 2-Way Studio Monitors Pair + LyxPro Cable Kit for Studio Recording, Home Theaters and More : Musical Instruments
WA-2 Wireless Subwoofer Kit | Klipsch
2) MTX 5515-22 15" 1600w Car Subwoofers+Vented Sub Box+Mono Amplifier+Amp Kit - Walmart.com