Just to chime in quickly here..I recently added a Bent Audio MU SUT 1:10 ratio(20db gain) for My Dynavector 17d2Mk2..Using a ARC PH3 SE with the fixed 54bd gain. Although the Dyna is now 0.26mV output(up from 0.23) it drove the PH3 SE okay and sounded good. But, without the MU SUT, it lacked the dynamics that brings the Dynavector to life, Better transparency, dynamics, bass is tighter and more weight. Once broken in, and properly loaded for the Dyna..the Bent Audio is far and away better sounding than the ARC alone without any negative downside IMO...Cheers!