Sooooo... this is the second time I've had issues with my rig. It's a GK 1001rb II into a GK Neo 4x12. First time I had a problem it was two weeks into playing and one of the speakers starting buzzing out. Under warranty, got replaced, no big deal. Now there's a distortion coming through. Checked all the cables, does it with all my guitars, it does it at low volume at high volume, sprayed contact cleaner in all the knobs, inputs, outputs, I checked all the screws along the speakers. All levels are set to the factory setting for "jazz/fusion" from the owners manuel. Sounds amazing. Until this. The only effect I run is an ehx bass fuzz pi. I do play heavy prog rock/post hardcore. Thinking about switching to an Ampeg rig. Anybody else have these kind of problems playing heavy music with GK?