I end up putting the foam back on (unmod)
seems the modded HD558 is a bit too bright.. sound stage is better but just sound a little too bright
Just IMO but I hate the hd558 cable and adapter for portable use :( . And there's pretty much no replacement cable for it (other than the stock version). Really wish I had known this before I bought them...
you can try to buy a short male to female cable to help relieve stress of the 3.5 port on your portable device, i use a cable splitter that has 1 male port and 2 female ports which total to a 3 inches long cable, these stuff are really cheap so i hope this helps
OK, after using it for a while.. I find HD558 too be lacking in bass, the high and mid is better than my HD515, but the bass is not to my satisfaction..
I think I'm going to sell my HD558, I think I'm not happy with it.. it may not be worth the upgrade from HD515
If you listen to them long enough, you'll eventually hear them as having a good amount of bass. There will be a psychological change, and burn-in will help as well (though not much). You may want to wait a little longer and see.