Several of mine are clipping diodes, so the higher the volume the less they do. Very handy for great sound at low levels, but sometimes to much of the shriller side of some Marshall sounds. (I like the fuller and thicker side of the Marshall sound.) Not to say you can't adjust it out of the sound, you just need to be aware of where you are. The 2 drive stages are the most important thing to me though. By running one into the other one way, then reversing it the other way, you have two different amps. Then when used with the MV you have yet another amp to control, one way is dime the MV then set one drive for dirt and the other for volume. This makes the feel of the amp extremely flexible and when used with the other tone shaping switch's it's just the most versatile amp I'v ever tried. Each one of those little switch's should be just a value that is easily changed. If it's not just right for you I'll bet Nik could tell you what to change it to. I may have him back off some of the extreme high's in 2 of the clipping switch's.