scientist36
New Member
i've built stereo active speaker use TDA 2005 bridge amp,with 18 vdc psu from 5 ampere step down transformator,when system on without input there's no huming sound,but when i conect the input from television audio output i heard some huming sound but when i touch the ground input the sound is decrease a little,whats wrong in my design,help me to resolve the problem,i see some home theater that sold in store dont produce huming sound.help me THX