My RE0 arrived today from Zococity.es. Amazing service, it took only 2 days to arrive! Now for some first impressions.
After I got them I intended to come right away to post my first impressions after listening to one or two songs but something else happened... After i got a good seal with the large Sennheiser bi-flanges i couldn't stop listening to these, i lied down on my sofa and spent 3 hours just listening to music with them. Yes, I was very pleased and impressed with the sound of these even without any burn in.
In the fit department... I didn't really like any of the tips provided. The normal single-flange ones are not very appealing since i find the medium ones to be small and the large ones to be too large. The small bi-flange is way too small and i can't get a good isolation and fit and the large ones are insanely huge (comparison photo below). That being said the large bi-flange were the ones that provided a better seal and sound for me within the provided stock tips. The only problem is that they are so big that they stay pretty much all outside my ears and it is a little uncomfortable (and looks plain dumb). I'm using the large bi-flange that came with the Sennheiser CX400-II (you can see them in the last photo below).
I plan on getting some Sony Hybrids in the near future.
Build quality wise they seem pretty decent, the cable is ok and they feel sturdy enough. Nothing like the amazing M6 (the cable on these is perfect, just perfect) but not bad either.
Sound... These are amazing. The detail is awesome and they have more bass than I expected! All the comments about the lack of bass made me a little bit anxious but in the end they have enough bass for me. It lacks a little impact but the quantity is pretty much ideal to me for normal listening. The mids and highs are very detailed and what i like most with these is that they don't have any excess of anything. The bass is just ideal, the mids too and so are the highs. There is no sibilance, no BOOM BOOM, they are very pleasing to listen to and i've been listening to them for about 3h non-stop and they are not tiring at all. All is balanced and in its place. I love it!
In terms of source I used the iPod 5G most of the time without any amp. I tried the E5 with them and i liked it with the Bass Boost on only (So, either 'Source > RE0' or 'Source > E5 W/ Bass Boost > RE0'. I tried them with the iPhone 3GS and i prefer the sound with it compared to the iPod (like usual). The EQ on either of the devices is pretty lacking but I can say the RE0 responded very well to them. Even using the bass boost preset (which usually is just plain horrible). I'm thinking of upgrading to a better MP3 player and getting a better amp so it will get even better.
Overall i LOVE them, even without any burn-in they sound great to me compared to the other ones i have and tried. The sound is very smooth and easy-listening with alot of detail. I really couldn't be more happy and my expectations were HUGE.
To finish, just a comparison between these and the V-Moda. I've read that they are very similar visually but comparing them side to side you can see that they are not THAT similar