Fosi Audio M03 200 Watt TPA3255 Subwoofer Amplifier Mini Mono Channel Audio Power Amp for Home Theater Full-Frequency and SUB Bass Switchable with 32V/5A Power Supply
Amazon.com: Stayhome TDA7498E 2 X 160W BTL220W Mono Power Digital Stereo Amplifier AMP Board Dual Channel Audio : Electronics