It certainly does a beautiful Marshally crunch with the gain & volume up on the TMB channel. I don't know that I'd make the claim that it sounds like a Plexi--it's a tube-rectified 18W amp with EL84s, not a 50 or 100W amp driving EL34s and solid state rectification. I'd say your best bet is to listen to some of the clips posted on that link I gave above and judge for yourself.