MTX RTP8A 8" 120w RMS Powered Subwoofer In Vented Sub Box Enclosure+Wire Kit - Rockville Audio
2.1 Channel Bluetooth Home High-power Subwoofer Amplifier Board Hifi Audio Diy 300w Ac 220v - Home Theater Amplifiers - AliExpress
700W 12-18 inch integrated subwoofer power amplifier board high power finished active subwoofer power amplifier
Amazon.com: Bluetooth Power Amplifier Board Stereo - HiFi 2.1 Channel 2X220W+350W Bluetooth 5.1 Audio Amplifier Board 12-38V Digital Power Amplifier Module Subwoofer Control with AUX/Bluetooth/USB Flash Drive : Electronics
2*50W+100W Bluetooth 5.0 dual TPA3116D2 Power Subwoofer Amplifier Board NEW | eBay