Wondering about a problem I'm having. My brother lent me his new Line6 Spider 112 (50 watt) guitar amp to play around on with my ESP F-204 bass (active electronics). The amp has one input. After connecting to it and powering up, the amp makes a screech sound when I turn my bass's EQ controls. (It's not a feedback problem). This happens with the amp at low volume levels, all effects off, even with the bass's volume at low levels. I'm thinking I have a mismatch between the bass and amp. The amp's manual says it has an input impedance of 1 MegOhm. I haven't the foggiest what my bass's output is. I guess this amp doesn't like the hotter active electronics. I've tested the bass on various amps, and it doesn't make any noise. The amp is in good working order, however, I won't be connecting to it unless I can figure out this issue. Any thoughts?? Mag..