I got the MicroStreamer in yesterday and have about 8 hours of headtime on it now.
It's a pretty solid upgrade over the DragonFly. It also highlights that I am indeed having some issues with output impedance for the ME into my 334s... the bass is strong on these IEMs, and I believe the ME was reducing it enough that is produced in my mind a more balanced sound. Even out of my MBA headphone out the bass is stronger. The difference is the MS brings back some of that tautness I perceived from the ME, esp. rolling tips back to stock, the bass becomes even more attenuated and mids more open - this is the best I've heard these so far. Stock tips and the ME wasn't working for me. I'm curious to see how the MS competes against a ME with the output impedance issue corrected, I'm still somewhat inclined to believe the ME will be better. The thing with the ME is I was getting what I perceived to be a pretty vast headspace, but who knows if that was a consequence of the alterations to the frequency response. The downside is the sound overall was a bit lean and lacking body.
I'm surprised there isn't more fuss over the MS - it does that analog but detailed thing with aplomb. Really outstanding considering the price and form factor.
I'll be putting in a call to my ME dealer today so I can get a corrected unit.
Edited by bobeau - 3/15/13 at 8:42am