i mean that the amp block has either too much distortion or not enough. when trying to set the gain, i can get amp block to sound really good when i play a full cord or a power cord, but when i try to "chug" (mute the strings) its when i can tell there is not enough distortion, so i give it more gain and it either sounds like it clips (not actually clipping on the output level) or i hear a thin high pitch sound. keep in mind is not all the amps, i've gotten the Diezel h4 and a few others to sound good, but the Marshall, Mesa amps and the Engle amps sound weird.