My Safari seems to go quiet for long periods of time. I've checked the connection and headphones, they seem to be O.K. I can bump the machine and I get my threshold back. I really don't want to send it back to minelab because of the expense and time it took the last time I had trouble with it. I guess if it is bad I'll go back to my Tesoro. Hopefully someone has had this problem and can help me out. Thanks Shorty2