It is a pretty big difference from running the channel with no mid cut. Ch. 2 and Ch. 3 are
really smooth. When the mid cut is engaged, I hear fuzz on Ch. 3 that is nearly impossible to dial out.
For reference I have tried it with NOS SED EL34 and SED 6550 through a Mesa Slant with Vintage 30's.
Same fuzziness on 3 with the mid cut.