Subject line sums it up. My 6 year old MIJ Fender fretless is a wonderful bass and is nice and clear until I stand in front of its amp (Yep, easy solution: don't stand in front of amp!). Is this a common problem? Is there a common solution? It starts off as a low hum when I am close to the amp, then increases to a loud buzz when directly in front. Thanks for any help!