Hmm I think the 4AI has more midbass, just the EX1000 has more bass overall because of the huge subbass rumble. The 4AI's bass can sound two different ways, but with the right angle in the fit that midbass warmth really comes out. EX1000 just has one offensive spike at 5.5k, it's not enough to label it a spikey treble imo. 4AIs do have better imaging, separate things more, the note clarity is probably a bit better on the EX1000, but the 4AIs do separate everything better. It's a close call of the two imo,
I do think my modded HF3s are technically better by a bit though but these are darn close, wish I had the R50s as I think that will compete quite well too.
I can't really use my EX1000 that much at the moment though, will do a side-by-side later, adding the 7550s as well with more definitive decisions.
I can't compare anything to the SS right now,heavily flawed yet special.
Edited by Inks - 10/11/12 at 11:17am