DIY Powerful Ultra Bass Amplifier STK4142ii , No IC , Hi-RES audio output

POWERFUL Stk4142 v.2 Amplifier board 🔊 sound TEST and REVIEW how to repair amplifier no sound, STK vs transistor. part 1, electronics HiFi Stereo Audio Amplifier STK 41x2-2 Como substituir STK por placa amplificadora no SONY #technicalDIY​ #diy​ #amplifier​ #ultrabass