i have a sharp gf 9191 box and the left speaker output is very low. the preamp is ok as the meters are reading level both sides. its not the stereo wide switch as ive seen people say. the left output is very tinny like you would here just from the tweeter only. but that's what you hear coming out of speaker. ive checked the speaker and its working fine. now has anyone come across this problem on a sharp gf 9191. the box it self is mint and so is the inside