This is very true indeed. I currently use my Arrow with the J3 and my RE262 iems and the 150ohm impedence of the latter really does mean they need to be amped to reach their full potential. The Arrow does the trick nicely. Only other time I've needed to amp iems is with the Ety ER4S, but they have a very low impedence.
1/12/11 at 6:12am