[Italian Stallion]

as some guys know i had my car gone for a while getting a new head gasket, when i got the car back about 2 1/2 weeks later, my alpine speakers in the back seats did not play vocals, only bass. i checked all fuses, and wires everything seems to be fine. tried the speaker in a friends car and it played. the audio guy in newton told me it was blown tweeters, but obviously not if it played in another car. any ideas?