I play an Ibanez EDB 600 active. It's an awesome bass, and it fits my style of playing very well. The only problem is, it's broken. A few days ago, I went to plug my bass in and it gave me the most awfully distorted sound. It sounded like the crappiest overdrive you've ever heard. I thought maybe there was a connection problem with the cable, so I used another one. Still the same problem. I thought maybe it was my amp, so I got my friend to plug his guitar into it. It played clean. So I knew it was the bass. I took the cover to the imput jack off and fiddled with the connections, and when I put it back together, it sounded clean again, but only for awhile. Now it sounds clean whenever I play lightly, but as soon as I hit the strings at least a little aggressively, the tone turns to mud. Any practical advice on how to fix the thing? I really like the bass and this is driving me nuts.