I have owned about Eight Mesa Mark IV’s and it is one of my favorite of the mark series. I did not care for the feel of the JP2C (I owned two of them). Just got the Reissue today, it does not have quite the same amount of liquid gain as a Mark IV, its a l bit less, boosted its great! It did take me a minute to dial in how i like it. The Master 1 volume does effect your lead master/gain. I have never play a real IIc+ but this seems pretty killer. I will try and do a quality recording in a few days, some of my studio gear is setup for a session this weekend