Hey, I just got a new (very slightly used) GK400 combo, the one with the 15" speaker. I play a Warwick FNA Jazzman, and i have found that playing the low E often makes the speaker overdrive/distort. Is there any way of solving this issue, minus playing lighter (because i do a lot of the time). I'm just wondering if its that the output of the bass is too high or if it is a fault on the amp. My guess is the bass, but i really don't want a problem with my new baby! and it can also be a little annoying when you're playing and the amp suddenly distorts! Any info you can give me would be great! Jason.