Joe, I'm listening this track on my modded ipod with my DIY amp; my amp is capable of recreating deep bass andit has a little increase in subbass. I'm listening on typical loudness level. There is nothing special in this track in terms of subbass quantity. But after your explanation I know that I shouldn't be looking for quantity but for quality. I will report back my impressions later today.
I should be getting dx90 at the beginning of next week. So I will test this track with dx90.
What headphones? Modded iPods can have deep bass roll-off depending on the circuit parameters used to remove the DC offset.