welcome to Hartke faulty units club,kido!!!!Do search on this forum and you will see that a have wrote same like you did -100 or 120 watts - here it is http://www.talkbass.com/forum/f15/problem-hartke-5210c-766586/ .350 watts?No way.Do you believe me now?Hartke? Never again .I have sent my a few days ago to be swapped with something else.