Alrighty! I got my R02-Pro's on Friday. Here's the verdict:
They are very good canalphones. The sound is very detailed, and the soundstage quite large for a canalphone (at least compared to my Sony Fontopia EX-51's which were a bit too muddy and harsh, and my girlfriend's Sennheiser CX300's which I find sound very dull). They have solid, but not exagerated bass response, which is nice and punchy, with reasonable sustain. The sound is reasonably balanced and rounded, and brings out detail in tracks that I haven't hears with other canalphones. The highs are comfortably bright and crisp, but compared to studio 'phones they're a bit lacking (of course), losing some of the top-end twinkle (in this case Sony MRD-7506's). Just now I listen to "The Becoming" by Nine Inch Nails (the new version on "And All That Could Have Been"), and I can clearly hear a little plucked violin that is far less audible in the CX300's. Like I say, they're very good.
The reason I say very good, and not great, is because they are a bit harsh. A little bit heavy on the mids. I suppose this is as described by the frequency chart. I'm sitting here now listening to Hunter by Bjork on my iPod. With her signature voice the loud notes are almost painful. This is a powerful, and unique song, but far from a harsh song. While the wide spectrum of frequencies is handled admirably by these budget drivers, there are just a couple of moments where you're caught off guard at higher listening volumes. I've run them through metal, punk, jazz, classical, pop, hip-hop, drum'n'bass, folk, blues, rock, industrial, trance and who knows what else, and I'm left with noticable ear fatigue after about an hour or so of solid listening. Things start out sounding a little harsh. Then my ears adjust after 20 minutes or so, but after an hour things are getting uncomfortable (which has happened over a few listening sessions since I received them).
Another point to make, and I know this is probably a symptom of a single driver design more than anything, but I feel the exagerated mids are saturating the drivers, reducing the impact and sustain of the bass. I tested this theory by EQ'ing out some of the 2K and 8K region, and the effect was reduced.
Moving on past the sound, we get to the physical design of the product. The cord feels solid, yet nice and flexible, and they don't tangle easily (so far). The enclosures are actually of a higher quality then I expected from the pictures. The stems are nice and rubbery, and the driver enclosure feels solid. Not too plasticy.
As for the earbud tips, I never had the chance to try the original R02's, but I'm not sure whether to say the new replaceable earbuds are any better. The small tips are of no use to me, but feel solid enough for those with smaller ear canals. The mid-sized tips are reasonable, but they feel very thin and flimsy, and they seem to be very hit-and-miss in terms of getting the 'phones to seal properly, especially if you push them in too far and they break the seal (at which point you must remove and fit again). This is in contrast to the tips from the Fontopias, which are almost identical in design (perhaps less than 1mm difference in diameter). The Fontopia tips are made of a thicker rubber, and seal properly every time when fitted to the VSonics. Next size up is the (extra) large tips, which are enormous, flimsy, and probably of use to no one. I doubt they'd ever seal well. They're just too big and too flimsy. Last, but not least, are the bi-flange tips, which fit beautifully every time, providing a nice seal and good isolation (and making the earbuds look like retro space lasers). I have found with all the fiddling, removing, and replacing of earbuds the bi-flange buds feel a little scratchy when I remove them as the inner flange seems to catch in my ear and spread as they're removed, but I've had them in and out of my ears a few dozen times over the last 24 hours so I doubt this would affect many. They seal as well and sound the same as the mid-sized Fontopia buds, so I may end up switching to those in the long-run.
Overall, I like these canalphones, but they're also quite disappointing, not because they're bad, but because they're so good for the price that the shortfalls leave you wanting that little bit more. I've focussed a lot on the negatives a bit too much... They're just let down by the slightly harsh emphasis in the mids, and cheap materials for the earbud tips. They're well suited to some music, but not others. They can emphasise some of the harsher tones of very well-mixed good songs. Bjork and Chilli Peppers leave me slightly cringing at higher volumes. At this price, they sound very good, and I'd definitely recommend them over the Fontopia's or CX300's. However, without any other similar or higher priced models to test against I can't really say whether these are the best buy or not. Perhaps I'll fork out the cash for some more 'phones soon and give a proper comparison.
CONCLUSION
Overall Sound: B
Value: A+
FYI - I tested these against Sony EX51's, MDR-7506's, and Sennheiser CX300, alternating between my iPod, and my PC, running iTunes with both mp3's and CD's through the USB audio interface of my Yamaha MW12 mixing console. At times I was comparing the same song from all three sources/formats. By quickly switching between them.
EDIT: I changed some of my comments as they spoke too harshly of these good 'phones. Don't want to unnecessarily put people off now!


). The ONLY problem with comfort is the slight spreading of the bi-flange tips on removal, but for everyday use I doubt it will bother anyone (and isn't bothering me today). As for build quality, there is the problem with the tips always getting a good fit, but after playing with them some more I think this is something that will only be a problem for the first couple of days (and I'd skip straight to the bi-flange tips anyway cuz they fit and sound great!). On the plus side, they fit onto the driver casing VERY well so I doubt they'd ever fall off and get lost.