2.1 Channel Digital Power Amplifier Board With Remote Control 2X25w+50W BT5.0 Subwoofer Class D Amplifier Board DC12-20V - AliExpress
SOTAMIA 120W Bluetooth Subwoofer Amplifier Mono Car Amplifier Speaker Amplifier 12V 24V 220V For 6-10 Inch Subwoofer Speaker - AliExpress
12V 2 Channel Mini Audio Power Amplifier 20W x 2 Subwoofer Amplifier Hi-Fi Integrated Mini Speaker Amp - AliExpress
220v 12v 24v Subwoofer 100w D100 Audio Amplifier For 8-12 Inch Speaker Audio Amplifiers Remote Control Dual Mic Amplifier - AliExpress
XY-T50L TPA3116D2 50W+50W Bluetooth 5.0 Subwoofer Amplifier Board 2.0 Channel High Power Audio Stereo AUX USB Bass CAR AMP - AliExpress
China Audio Factory 500W Class D HiFi Super Bass Digital Subwoofer Plate Amplifier - AliExpress
SOTAMIA 120W Bluetooth Subwoofer Amplifier Mono Car Amplifier Speaker Amplifier 12V 24V 220V For 6-10 Inch Subwoofer Speaker - AliExpress
Excellent TDA3116d2 version of the sw-105 subwoofer/amp board from aliexpress. Solder joints are excellent they've used plenty of flux here, the rest of the board is well labelled so easy to mod
OEM Subwoofer Amplifier Board 5.1 Home Theater Party Amplifier Board 200W PSW1-PA00-0 - AliExpress