If you use this, https://www.superbestaudiofriends.o...-u3-review-the-douk-of-wishful-thinking.13953, Modius E will have funky digititis in the top octave. There's still vestiges of ESS no matter what. Get the right (or wrong) gear, and it's easier to hear. Still better than the Modius AKM, where the top octave weirdness was even more evident and just kind of sprayed all over the place. Pretty much. MMB2 is almost always on NOS unless I am running a dark amp/headphone. MMB1 with all the incremental improvements was a unique, special piece. This made MMB2 disappointing coming at it from a certain way. The treble issues that some people have been having with the Bifrost 2/64 are well documented.