A out of topic question, what's the closest IEM soundsig-wise to the HD650?
Thanks!
I would disagree about the IE8/80. it's more of an exaggerated hd650. more bass, more mid veil, slightly too much of a treble spike to fool us into feeling resolution. now it is non fatiguing and the bass are very "tactile" for an IEM, it's easy to enjoy it when you like the hd650. so I'm not saying not to go for it. but they don't sound that much alike to me. the IE is strongly V shaped.
depending on how much you're looking for something warm and relaxed, or still want to keep details more up front(at the cost of maybe more fatigue), I would look for stuff like hifiman IE400, monster turbine copper for cool smooth sound. and maybe gr07 and se535 for a more balanced signature.
the 535 with some EQed bass and maybe a little something in the mids(or a source with a few ohms), and you get something that to my ears can be pretty close. I would EQ them all a little to get closer to the hd650( I EQ everything ^_^), but they are all already more than ok as is.
as long as you keep in mind that IEMs are crap compared to fullsize, and that you're trading sound for convenience, you should avoid disappointment.
stuff like W4/40 lack too much mids IMO, but then again if you're just looking for something laid back and non fatiguing, they certainly can be it.
none of the IEMs I mentioned are bad IEMs, you may also ask yourself if you need great isolation or not, or if you have trouble with certain shapes or size of tips to make your choice.