Just some impressions, which were through listening for quite a limited time. Also didn't bring the uha-6s with me, which has been my favorite for orthos in general. So tried them with xperia z2 (so shit after the lollipop update), rockboxed classic, hdva800 and the oppo portable dac/amp.

Can't say i was that impressed, but pretty close to what i would gather from the measurements. When there was low bass, something like under 50Hz, everything seemed to be covered in slow pouring syrup.  Quite smooth up top but a bit papery treble presentation that lacked detail and dynamics. What bothered me the most however was the inability to distinguish very basic musical elements. Low toms and kick drum were one with melodic bass level instruments. Relative pitch differentiation was sub par from a headphone of this price. I would boldly say that these would only work for rather minimalistic music, whether acoustic or electric. Both the fsp and paradox resolved basic information much better.

Could be that the leckerton would change things, as they did with the lcd2 (bass was'nt so messy after all!), but not that interested anymore.. I liked the pm2 however.

Thanks for taking the time to measure these and share opinions. I'm currently listening through a Yulong D200 DAC/Amp combo with the PM3. Overall I find these a tad bright/forward in the upper-mids/lower treble like you, but I'm finding it interesting the bass is showing that. I am not finding these very bassy, though extended nicely with a touch slow decay. I find the mids/treble to be a bit dry though, a little thin. I agree that the imaging from left to right seems to be rather good, rather intimate soundstage but good sense of where things are. I find the soundstage enveloping though.

They seem to be in-between analytical and fun, engaging and fatiguing. So far I think that they sound very nice, some flaws for sure, a bit closed in sounding, but they're a nice package. Better than the Mad Dogs though? That's what I think these need to be compared directly too.

With the PM-3 when you refer to bass, are you referring to bass as in "thump" from say a kick drum, or bass as in from a bass guitar or synth bass, etc... or both?

I've said this a few times before, not necessarily here, but what is your background in headphones? Trying to gauge what you consider bassy and not bassy. It could be that you're used to bassier headphones or that you're more used to bassy being mid or upper bass emphasis, where as the PM3 has a more low bass emphasis.

The PM3 is also very sensitive to seal. Even a slight break in that can drop the bass by a few dB. I can imagine a scenario where someone with a certain head shape/size or ear shape wouldn't get the same sort of seal that I do. Even having a smaller head than I do could reduce clamp which could then reduce the bass response. Hell, I bet even having more hair than I do could affect how well it seals. PM3 is quite touchy with seal and bass response.

Agreed that something about these is a bit dry, though I wouldn't say thin. I think with the low bass emphasis and slight upper-mid/low treble bump, the mids sound a bit recessed and less lush than they could otherwise. When you get a really good seal, though, the strong bass often makes up for it. If you don't get that sort of bass, the PM3 can definitely be thin and dry sounding.

My favorite headphones of all time are the AD series of Audio Technica. I currently own the InEar StageDiver 4 IEM, Audio Technica W1000x, Audio Technica A900x, B&W P7, Koss Porta Pro, Sennheiser HD650 and Audio Technica Ad2000x.

I consider headphones like the Beyerdynamic DT770 to be bass heavy and the P7 to be thick/bassy. I haven't done an AB yet, mostly out of laziness, but I would guess that the P7 are more bassy compared to the PM3.

I'm not saying that these are bass light, they have a bit of a thick low-end, but on the other hand I wouldn't recommend them to a basshead. I think the bass, from my short time listening, lacks a visceral punch and comes off a bit thick, but sounds rather laid back than quick and forward. Basically I'm trying to say that the bass comes off more as a thick presence than sounding clear or punchy and becoming a focus  What I'm hearing is that the upper mids seem to be the most prominent frequency. The bass is no slouch, but I think it is rather laid back.

I hope that makes sense in the least, I don't blame you if it doesn't as it sounds pretty stupid reading back, I just don't have the right words right now.

I've only heard them for about an hour though so my ears are certainly adjusting.

Thanks for your response, I certainly understand where you're coming from with the PM2 and HD650 and I appreciate your response/opinions.

I've given the PM3 more head time and I've found that the bass comes off a bit too thick for some rock based tunes I'm listening to, The Rolling Stones - Miss You, for instance, the bass guitar is too present, taking away the energy from the guitars and vocals due to them not being balanced in the mix in comparison. Everything is clean and heard nicely, but they lack forwardness in this case. The bass is a bit thick and lacks the punch that I've heard in my other headphones.

Conversely Kendrick Lamar's "Backseat Freestlye" benefits from this due to the headphones putting out sub-woofer esque bass sans the rumble. It's sort of a tease in that regard.

After listening more I certainly give them a pretty warm edge to them with mildly forward upper mids, with a slight treble roll off and slightly scooped mids. Not really v-shaped, but not entirely balanced.

I think they sound rather nice and the soundstage is rather enveloping, good sense of space and imaging. I'm definitely delving further into these.