I posted the below in the fxz100/200 thread, but it might be of some interest to tdk-heads as well because the point really was that I like how these tdk mt300's respond to this sub-bass test:
Originally Posted by esmBOS
That is a cool sub-bass test track - thanks!
S500 = Lots of sub-bass. Almost too much!
Uptowns = Lots of sub-bass. Enjoyable.
Tdk mt300's + mh1c medium tips = Quite a lot of sub-bass. Could feel it, but still pretty tight. Enjoyable. Yet another reason I like these cheapies so much.
Tdk mt300's + mh1c large tips = Whoa - lots of sub-bass. Almost too much, but still sounds cool (I think I'll have to try for a while with these tips again).
Sony xba3's = Could feel the sub-bass a little bit.
Sony mh1c's + mh1c medium tips = Could feel the sub-bass a little bit (not much).
Sony mh1c's + mh1c large tips = Quite a lot of sub-bass, but looser/boomier than mt300's (with either tips).
Brainwavz r1's + large r1 tips = Not too much sub-bass.
Brainwavz r1's + large mh1c tips = Fair amount of sub-bass. Enjoyable.
Jvc fxd70's = Couldn't really feel it at all.
Jvc fxz100/200's = Sadly, I just don't know!