Ken Restivo wrote:
  What's giving me headaches is bass rolloff on
certain systems. On the
 nice flat Fostex studio monitors I was able to borrow-- and which
 don't have any bass emphasis--, it sounds well balanced. On crappy
 iPod earbuds which roll off the bass like crazy, it works well too.
 But on car stereos or club systems which emphasize the bass, the kick
 drum and bass guitar are way too hot-- sounds like the whole thing
 was recorded from inside the kick. 
Sounds great on the two systems I checked, maybe the bass could be 1db
lower.
I agree with the suggestion to make sure you rid yourself of anything
below 50hz. I'm not sure, but this could be what's causing the trouble
on some systems.
--
Atte
http://atte.dk   http://modlys.dk