110-220v 200w 100w Heavy Subwoofer Digital Power Amplifier Board Active Power Amplifier Board Hifi Pure Bass 4-8ohms - Home Theater Amplifiers - AliExpress
300w Subwoofer Amplifier Board Low Pass Filter Subwoofer Pure Home Theater Active Subwoofer Amplifier - Home Theater Amplifiers - AliExpress
ZK-TB21S TPA3116 2.1 Channel Bluetooth 5.1 Subwoofer Amplifier Board 50WX2+100W Power Audio Stereo Amplifier Board Bass AMP - 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
Bluetooth 5.0 2.1 Channel Power Audio Stereo Subwoofer Amplifier Board 50WX2+100W Speaker AMP HIFI S100L - AliExpress
Amplifier PCBA for 6 X 160W (MAX) HIFI Digital Class D TDA7498E Home Amplifier Car Amp Audio 5.1 CHs DIY Free Ship… | Subwoofer amplifier, Hifi amplifier, Amplifier
VU meter head multifunctional HIFI digital power amplifier Mono 2.0 stereo desktop amplifier Subwoofer amplifier - AliExpress
12V 1000W Car Audio Amplifier 12inch Car Subwoofer Amplifier Board With Installation Box Mono pure bass amplifier - AliExpress