Thanks for taking the time to listen to this unit Rob. As far as dynamic headphones I only used a Sennheiser HD580 and a K1000 with the HLLY TAMP-20, both of which are "well behaved" units plus at 52 my ears are not very good beyond say 16-17 khz. I have also used the HLLY TAMP-20 to drive an spritzer modded Stax SRD7/Pro energizer box which in turn drove an Stax Lambda Pro.
Anyways at $118 w/ S&H the HLLY TAMP-20 is a very good deal and one which will make many very happy. Cheers.
