Well i got my subs and amp installed today by Tweeter ( i thought theyd do a good job) well first off drop car off at 12pm they say it will b done by 6 or 6:30 im like wtf?...they say they r really behind so im like ok well i get back everything is in and wired and they say they cant get subs to respond and to come back tommrrow...well i dont really wanna go back tommrrow so what all can i do?...to try it myself They tapped the line in converter behind the radio?..was that ok?... the amp turns on just no sound?...help thanks