Maybe I'm missing something. Had my Ax8 for about three months now using a Matrix gt1000 into a 1x12 EVM12L speaker. Not bad at all. Decided to try a Xitone 1x12 passive FRFR from all the hype about FRFR. Awesome cab It's a keeper. But what's going on with my dirty amps, mainly the Marshalls but all amps are affected. They are so very bassy. I tried the tone stack with some success. Tried many cabs. Other then turning all the tone knobs whats do you think is going on ? Thanks