That's like 2x the bass shelf the Harman research says the average person likes best, so I reckon so.

I always like to compensate for the natural rolloff there on most HPs. Sometimes I add more low end <100hz on top of that, I like the illusion of the tactile thump you get from good loudspeakers, though I feel some kind of weird puritanical audiophile guilt about it.

I find my bass preference is right about Harman-average. With the HD600s I like to use something close to the first two bands of Oratory's preset: a 5.5db shelf at ~100Hz, and slightly attenuate the low mids to compensate for how that muddies them up. (beyond that I mostly let the headphone do its own thing EQ-wise, except to tame that ~3khz midrange peak 6xx-series Sennheisers have)