Deep bass is "must have" for soundstage size. Generally, bigger drivers are capable to move more air. But this an assumption with any specific choice. So I recommend to search the reviews of these cans for bass depth. Do not miss it with weight. ATH-AD700 is excellent with virtual surround while...

Any comparisons to ER-4P/S? XBA-3?

I tried HF3 - it is a bit off "Ety sound" to me. It is a blend of ER-4P and Shure E4c. The latter is "old-good" model with remarkably smooth sound ADDED: and rolloffs on both ends of audio range. HF3 is likely the best handsfree for iPhone, at least in its price range. But it is not in ER-4...

Check the seal, try smaller tips and deeper fit.

good o' HD650

Take a look at mx680 or mx685. Stable fit, kevlar reinforced cable, water and sweat proof. I enjoy mx680 outdoors. Quote:

HiFiMan will release new flagship. Or you can buy XBA-3 which is pretty good.

It will be better, any way.

What were the source / records?

What?

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