The cable I use for the my HEX v2's are pure silver made by Ted. I'd like to use them on other cans but they are a specific size. Anyhow very nice piece. For the 6se I use a Custom Cans cable, OFC, very low impedance, destroys that stock malarkey.
HFM cursed to make great cans coupled with absolute dreck cables.... better than the other way round.
Yeah I played around with EQ once using a recommended profile from someone on Reddit and was impressed with the improvement in the bass with EQ applied.
Hz db Q type
85 +3.0 .78 low shelf 2 -helps give authority to bass, but isn't fat or amusical.
460 -1.8 .82 digital bell 2 at both ends: 100 and 900, pull down the other adjacent curves, and yes needs a small drop from 700-900.
1580 3.9 1.3 analog bell - most necessary setting, rounds out voices from that lemony/curt edge.
4000 -3.9 2.70 dig bell 2 - takes off edge, but centered very much on 3800-4200, not broad.
9850 -6.8 6.00 " " - toggle this off/on a number of times, the sizzle/long decay issue of many HFM cans are scotched.
12000 +4.8 5.00 " " - this brings in the treble where it needs help to extend upward, and makes up a bit with what is lost at 9850 with a correct signal.
Edit Add:
Here my 10 band parametric that I use most often (have 5):
00028 Hz +2.4 1.00 Low Shelf
00480 Hz -1.6 3.00 Digital Bell 2
01090 Hz -2.1 9.00 "
01740 Hz +4.7 0.80 "
03000 Hz +2.0 6.80 "
04300 Hz -3.4 6.80 "
09000 Hz +4.0 5.50 "
10500 Hz -4.6 6.50 "
14500 Hz +5.2 2.80 "
18500 Hz -7.5 1.00 High Shelf
The 18.5k setting might seem like a waste, and I really can barely hear to 15k, but there is some disortion up there, or maybe its less micro movements for the membrane - but it takes off about 1/3 as much hash as the 10.5k setting that cuts down ringing (a lot). p.s. I think my nasty range is a bit higher than most.
According to several well regarded outfits my setting at 1740 Hz is not enough, but even a db more and the mids are really shouting, no thanks. I've banished the hollow distant sound with this setting. This can cannot be enjoyed w/o EQ once you hear this one set well (you need that 4300 Hz cut a lot too).
And of course I disdain the moronic bass settings promulgated by people that insist on putting us ALL in a uniformly crap room. I'm sure the bass uber alles crowd can never get enough regardless of amusical it is. But if you are concerned with hearing the recording fairly close to how it was recorded, than uniform bass boost under 100 Hz is just crap.