Here's the story. I have a Markbass Little Mark II head with a 2x10 cab (8 ohm). Yesterday, during rehearsal I noticed something was wrong. My bass sounded thin and slightly distorted, crackling a bit, like a little amp that is being pushed too hard. There's a slight loss in volume as well. At first I thought it was my bass (90's ATK). Changed the battery & checked the battery connector (had some issues with this before). No difference. Tried several cables, no difference. Plugged in a guitar with bass turned up all the way on the guitar, still the same issue. What I noticed as well, is that it seems to be worse when playing softly. I don't think it's the speaker because really pumping the volume a couple of times didn't make it worse, so there's no ripped speakercone I think. I've had this amp for 3 years, always been nice to it, pushing it never over 75% of it's max at certain gigs without PA, and rehearsing with it at 60%. So, can anyone help me?