Fair enough. I thought that if your a basshead and don't find the bass of the DJ satisfying enough, then really you shouldn't be on headfi!!
Literally find a way to suspend two subwoofers from a headphone headband and then your done. The bass in mental on this ultrasone, and really really enjoyable I must admit.
The bass with the Sig DJ is so satisfying, I don't even have a desire to use bass boost. It's also the SQ across the range that makes these so special as basshead cans- perfection to my ears.