I just noticed on my behringer headphone amp (HA4600) that the min. output
impedance is 100 ohms. I also just noticed that my sennheiser (HD280)
headphones are 64 ohm..... hmm.. maybe this explains why I've never been
happy with the way these things sounded. I also was just looking at a set of
the Shure E2's and they are 16ohm... so by my own reasoning it would seem
that I can't use either the headphones or new set of E2's with the HA4600.
I've been using the HA4600 with the HD280's for two years and never noticed
any of this.. (stupid) and I also have never been happy with the way they
sounded but i don't think it's the headphone amps problem. The system I was
using the headphones with had a OLD carvin mixer.. I now have a DDX3216 and
have yet to set up a mix through it but I've already run a almost 2 months
of services with the DDX and I can tell that it sounds ALOT better all the
Should I look into another type of headphone amp? I really would like to go
with a pair of wired In-Ears that can be upgraded to custom molds.