Just put the Ori version of these:
http://www.zmfheadphones.com/pads-and-cables/zmf-suede-earpads
on my HE-560. Interesting change from the lambskin version. After a cursory three-hour session, I'll agree that there is "a slight reduction in mid-bass compared to leather earpads", and maybe that's what leads to a
very slight sense of less overall detail. HUGE caveat to that comment: it's extremely hard for me to pin that down, so I may be imagining it; thus,
very slight; to the point it's basically meaningless. I was listening to a few things that have subtle vocals that tend to be buried in the mix. I was expecting that with these, but quite the opposite happened: they were distinctly clear (clearly distinct?). Now, that may be down to the tubes in my Lyr, which are new to me (1966 Foton 6N3Ps;
epic). I'm not rolling pads just to find out. Once I switch back to the leather, hopefully I'll remember to listen for it.
Bass definitely does not suffer (see King Crimson's "People" from
THRAK as one example). Overall I'm diggin' the sound and comfort. Haven't tried them on the HE-5LE or HE-500 yet. Given how dead simple it is to roll the Ori pads in general, I can see switching them around until they settle on one pair, or just roll on pure whim. It's nothing but Ori pads for my HFM cans.
If you're not familiar with the Ori pads, here's what sets them apart from others that can be made to fit HFM cans: they are not round on the inside. They are ergonomically oval... like your ears. For me, at least, those with round internal openings always come up short - very short - in fit, and thus comfort. Amazes me other manufacturers don't get it. You get what you pay for, I reckon.
Just a note: these
are not suede ("leather with the flesh side rubbed to make a velvety nap" - Google), but "vegan" micro suede. I think that probably increases their comfort, but whatever. This is high quality stuff, at least on par with the well-known Audeze Vegan pads. Those and these are the only two I'm aware of that use this quality covering that fit HiFiMAN cans. Having tried to mash up pads like these with micro suede from a fabric store (fool's errand), and being disappointed with the difficulty of trying to fit the oversize Audezes on HFM cans (forget about them on the HE-560 or any HFM can using the same headband/yoke system), I give a major tip-of-the-hat to Zach for bringing these to market.