Сейчас ищут
Nek Alvatronics. Смотреть видео: Rockola Op Amp Differential Stage 2pairs Compact Design For DIY Amplifier, DIY Amp Rush Build How To Make DIY Power Amplifier, Pampalakas Ng Amplifier Boost Converter, Paano Gumawa Ng Power Supply Para Amplifier DiY 8 E Caps Power Supply.