I just bought a Little Mark II from Guitar Center today and plugged my passive Fender P into it and my 2 Aguilar GS 112s. The tone is fine when I play (fingerstyle) lightly but as soon as I use a strong attack, I'm hearing lots of distortion. At first I thought it was vibrations in the room and from one cab to another so I put one cab in another room and played the head through just a single cab, but I'm still hearing the distortion. Ugh. I have the eq set flat and the two filters completely off. Gain is set to 10 o'clock and volume around 1. These aren't loud settings. And the clipping light is not lighting up. Does anyone have any idea what's going on? Like I said, the tone is nice and clean with a light attack, and I've played my GS 112s through an Ampeg B2R with no distortion issues, so I don't believe it's the speakers.