Got IM50 today from accessoryjack.com (http://www.accessoryjack.com/audio-technica-ath-im50-dual-symphonic-in-ear-monitor-headphones-black.html), btw they got the BEST price for $67 shipped, and I was also very pleased with their careful extra packaging. Just did a quick 6hr burn in with pink loop, these are dynamic drivers after all.
Full review to come soon, but here is my quick first impression.
So here I'm sitting and scratching my head with IM03 in one hand and IM50 in the other hand ($300 price difference), and let me tell you - IM50 is among the BEST price/performance/build ratio IEMs you can get on the market right now. Identical removable cable with behind-the-ear memory wire, same high quality build, slightly smaller than IM03 while having a longer nozzle (still a similar fitment ergonomics). Very detailed balanced sound with an excellent enhanced bass representation with both quality and quantity (fast punchy mid-bass with a nice sub-bass layer, not too overwhelming and without spilling into mids). Mids are a little more upfront in comparison to IM03, very detailed, natural, musical. In comparison, IM03 mids pushed a little bit back, but sounds smoother and just a little bit fuller. No harsh peaks in either of these. Excellent delivery of vocals! Treble has a nice sparkle details, extended, no hint of sibilance, to my ears it's matched between IM03 and IM50. One obvious difference, IM03 has a wider soundstage in comparison to IM50, and I can hear sound being a bit more layered (crossover with triple BA driver has an advantage over dual dynamic driver in this case). But in general, overall sound signature is similar. I also think it's very impressive to have such a beautiful midrange delivery in headphones with enhanced bass (don't get a wrong idea, these are not for bassheads, just extra bass quantity to make you feel these lows hit hard!!!) where you typically expect v-shaped sound but instead treated with a balanced signature!
I'm very impressed! Definitely an excellent alternative for those on a budget who have been eyeballing IM03 ;)
Edited by twister6 - 5/31/14 at 5:26pm