I was listening to some Beethoven and Brahms chamber music just now and was wondering why I was feeling so unsatisfied and even discontent. Then I realized it's because everything is slightly out of tune. Gross. Time to listen to some auto-tuned pop.
SR-3N
Have tried to buy a pair of SR-3 or SR-5 on and off for over a year now, losing around 10 auctions. Really wasn't expecting to win this one either, oh well. I don't even listen to headphones anymore.
Probably same idea Fostex had with their oddly arranged hole patterns. There definitely isn't too much total hole area though.
Have you tried playing around with the stepup trafo settings vs frequency response?