Originally Posted by
tomscy2000 
It's possible they made changes, but do they really need to? Even though the head-fi community practically described the XBA series as a failure, I'm sure it sells fine in Japan and overseas. /
We all have similar hearing. The XBA series is a 'fail' in Asia as well, for the people which are experienced in IEM's. It sells fine (and sounds perfectly fine) to those which have never heard an IEM before, which is 90%+ of the customers I'd imagine.
Sony, along with a lot of Japanese and European companies have usually put technology first, selling later. I'd like to think they haven't changed that recently to different ideals. Though some of the recent marketing has that feeling a little.
Sony invented a lot in portable audio, without them hardly anything we have today from other companies would exist, since they've mostly focused on 'copy and improve' techniques. They kept to their ideals by making their own BA drivers from scratch for the XBA series, but they need to keep working on them.
Originally Posted by
tomscy2000 
/ The thing is that they have identical sensitivity and impedance specs, so changes to the drivers are unlikely. Crossover changes, acoustic or electrical, are thereby unlikely also. You're right though that they could improve resonance damping of the housing walls, though. Perhaps that is what they changed, similar to how they made the EX600 from the EX1000/800ST.
Sometimes specs are very lazy, so you never know. If the only improvement is LCP on the inner walls and higher purity Copper in the cables then I think I'll skip these.
I'm not really trying to defend Sony, like I wrote in the other thread they handed over their TV title to Sharp and Pioneer, and they've handed over their portable audio title to Audio Technica and JVC.
If they've lost themselves to marketing and weak financial tactics, the only 'real' Sony IEM left now is the Ocharaku Flat 4.