Actually there are plenty of open headphones with good bass. The HE-6 fed from a vintage amp was actually the most visceral bass I've experienced. The HE-400 has as good quality and quantity bass as you might want, as does the Phillips X1 among others. Those three are the only ones I've owned so won't comment on headphones I haven't owned/tried.
Not trying to argue with you - I'm just giving another perspective so lurkers reading this don't think that all open back headphones should be excluded from the bass conversation.
I agree with this. Closed headphones have an easier time of reproducing visceral bass, but open and semi-open can do it too (the TH900 is semi-open and is right near the top).
When speaking objectively, you will likely see more physical paper shake from a closed headphone in comparison to open because the sound pressure is all going one way.
But, frankly, that's a slight mistake on our part as bassheads. HBB is a badass for figuring out how to objectively measure the maximum bass potential of headphones with paper, but practical bass impact at listening levels is another thing entirely.
I love my JVC HA-DX2000/HP-DX1000 more than any bass can I've owned. Their pads absorb a fair amount of the impact, so they can't make the top 10 list. But, at practical listening levels for me while working, they actually give more chest-thumping and visceral bass than my SZ2000 did.
If I specifically want to shake my head at super high volume, the SZ2000 can't be beat by anything out there. But, when I'm listening for 8-10 hours at a time, I can't go to those dB levels.
Back to the original comments... I can actually get the Sennheiser HD650 to shake if I want them to. They're completely open and rolled off in the sub-bass, but it's still possible to drive them to the point of shaking.
I'd love to hear the HE-400 properly amped and equalized, because it likely falls into a similar category to the DX1000. Practical listening volumes can get you excellent bass, but they likely give up sooner than the SZ2000 when you pump them over 100dB and start damaging your hearing. I trust
@Oregonian's ears.