Amazon.com: 320W Power Amplifier Board with Subwoofer 2.0 Channel 160W×2, 15V-36V Audio Power Amplifier Module with Treble and Bass Control,Black : Electronics
FP20000Q 4-CH Power Amplifier 7000W@2Ohms Profesional Audio Subwoofer For Stage | eBay
Amazon.com: Facmogu ST-838 2.1 Channel HiFi Stereo Subwoofer Amplifier, RMS 20Wx2+40W Mini Digital Audio Power Amplifier for Home Speakers, 80W Subwoofer Amplifier Audio Stereo Bass Amp with Power Supply - Black :
Porfeet 200W Audio Power Amplifier, 2.1 Channel Support 2 Pairs Speakers 1 Subwoofer, Wireless HiFi Stereo Amplifier for Home & Car (Plug not included) - Walmart.com
Amplifier Board Audio Stereo AMP High Subwoofer Power Amplifier Board 220V/12V/24V for home Speaker - Walmart.com
Amazon.com: Amplifier Board, 2.1 Subwoofer Power Amplifier Board 240W High Power 3 Channel Bluetooth Audio Amplifier Board Home Theater : Electronics
Source china professional small subwoofer audio power amplifier EP4000 on m.alibaba.com
Amazon.com: Nobsound G2 PRO Hi-Fi 300W Subwoofer Power Amplifier Mono Channel Class D SUB Audio Amp : Electronics
Amazon.com: Fosi Audio TP-02 TDA7498E Subwoofer Amplifier Mini Sub Bass Digital Class D Integrated Subwoofer Amp 220Watt : Electronics