Just got in a pair of these yesterday...
...the ATH-SPORT2 in navy/yellow.
They are starting to appear in the US. Not sure what the street prices will be as I bought a CES hand out off someone. So, not an actual store bought one.
I only knew that the Sport2 has a new 28ohm driver and is said to be balanced sounding. Not the typical sport earphone signature. The only thing the box says as far as sound is "CRISP/CLEAR AUDIO".
The ATH-SPORT2 is a part of the new sport series. It has a lightweight cable that is J to not deal with tangling as much and to be able to just wear them on the neck. You, know after your work out you don't really have a case in your pocket or if you stop and talk to someone or do something you take them out, they rest on your neck and your hands are free. J-cord is more for sport and not to well liked for normal phones.
Thing is the phone they most resemble in form, fit, and sound is the Titan-1. Using both with AT tips, the Titan 1 have no edge in clarity to the Sport 2. The Sport2 though is one of the few phones I have looked for tips that give more bass and warmth. Much the opposite of sports/exercise models like the Sony AS800 or the Pioneer E721/751. I have tested, so far, on my Sony S639 and A15 and my iriver E300.
The SPORT2 sound balance, tube angle and depth, light thinnish cable are all quite Titan-ish like. If someone wants a sport version of the DUNU these would fit nicely. Not up to the sound quality of the Titan-1. Bass reach is a bit less and the iso is better and the stage suffers a bit. Titan-1 is a bit bigger sounding. Detail hasn't fully come in yet but I can't complain even vs. the Titan 1 and IM02. They were $25 shipped so not gonna complain at all. A step down but not that much.
As you see in the pic above all the secure fit pieces are off. They are pretty big and ear filling so that I can use either the small or none at all. I choose none so my left side get more fit depth. Bigger ears should get better fit and a bit more bass than I do. So maybe more bass and warmth than me but still almost armature sounding with a quick and clean note. Doubt they could ever be really muddy sounding except for occlusion effect. Either way they will be more in the balance sounding camp than the bass heavy camp. The Sport 3 is known to be the bassier model so far.
The Sport2 do make phones I have sound muddy. FX46 is similar pricing but gets beat quite handily. CX3.00 gets beat even with the filters removed from the tubes. The CX5.00 also gets beat cause it is only slightly better than the CX3.00.
Brainwavz S0 is also a balanced sounding phone and good esp. with a slightly looser seal than you can get. Still, the SPORT2 is cleaner and more natural sounding with better treble tone and tighter sharper bass.
An interesting comparison, though maybe not the same signature, will be the VSD2S when they arrive. From my memory of the VSD1(non-S) The S0 > VSD1 slightly so the SPORT2 may still beat the VSD2 which I did no think would be the case. The S version is said to have slightly better but less bass and better clarity than the VSD2 and the VSD2 is a small step above the VSD1 so the 2S and S2 :) should be very close.
So, I can certainly recommend the SPORT 2 as they look good, have a light cable, are rinse-able(IPX5) and fine for sweat or rainy days. They have a quick and easy fit and a good clean sound. The stock isolating tips are amongst my favorites as they are similar to the CKP200 that I use on the Titan and other phone for quality bass w/o treble degradation. Clip is generic, no case, and the ambient tips and secure fit pieces are of no use to me but may be to others. For the prices, $31 shipped from CD Japan and the U.S. street prices, they are weatherproof, seemingly durable and offer a high SQ value especially if you like a more balanced signature.