He fellow forum members. I received my Pro 78 as a gift from my daughter. I really like this detector. However upon turning it on today it make a crackling sound and the speaker now sounds like crap. All else works fine...just whenever I get a alert it rattles & sounds really bad. I've asked my daughter if she still has receipt so I can see where she purchased it from so I can check on warranty...No such luck. Any suggestions? I really like my pro 78. I thought it was of a better quality. I guess mine is a lemon.