2.1 Channel -lt22 Bluetooth Amplifier Board With Shell+dc Cable 15wx2+30w Subwoofer Audio Amplifier | Fruugo NO
2.1 Hi-Fi Class D Audio Amplifier Board 2 x 15W + 30W 10-18 VDC
AIYIMA 2.1 TPA3110 Subwoofer Audio Amplifier Board 15W*2+30W Mini Stereo NE5532 OP AMP Bass For Woofer Speaker Home Theatre 211011 From Jiao10, $22.3 | DHgate.Com