I de-listed the amp on Reverb because I think there may be something wrong with it, which would explain why I wasn't thrilled with the low end tone I am getting. Instead, I contacted the PTC about it so that hopefully they can check it out and tell me if it is supposed to sound that way. I never thought of doing that before because we know that they deliberately re-manufactured the imperfections into the cenemag transformers which were present in the original amps this is modeled after. So, all along I thought it was supposed to sound like that. (Overly muddy low end.) I"ll let you know what they say.