I've had the PM-1 for about 6 days now and will be sending them off to the next person tomorrow, so I thought it time to put down some impressions. From the time I received the PM-1 til today I've avoided reading any reviews of these cans to not influence my judgement, especially Tyll's. As I sat down for my final session with these, and thus the beginning of writing my impressions, I decided I had a pretty good idea what I was going to write so I decided to read Tyll's review for perspective. In the past, Tyll's impressions of certain headphones and mine don't particularly line up well so I was expecting just to take it in and write what I was going to anyway. I am surprised and pleased to say I hear the PM-1 almost exactly as Tyll does, so thankfully that will save me a great deal of typing. (Thanks, Tyll!) I offer my reinforcement for your decision to WoF these cans.
There are a few notable differences in our impressions, but none are drastic. First, Tyll mentions that imaging isn't as strong on these as on others. While I do agree with that compared to the very best, I find them no slouch in this department. I find they do a great job on imaging, especially in the frontal region, particularly the center image, which is my #1 priority. The PM-1 is, so far, the only planar (magnetic or electrostatic) that has an acceptable center image, and it does a good enough job just off-center as well. Previously only the HD800 was able to do this for me, and while the HD800 still does it better, the PM-1 is in rare company.
Another difference is his mention of resolution and finesse also not being up to par. I find the resolution good to a point, that point being treble resolution is pretty dreadful, but things like texture and detail in mids or bass are very good. Sounds in the treble region are still decently articulated, but there is very little texture going on up there. Instruments with harmonics reaching up into treble sound a little off. Finesse is very similar in that the bass and especially mids sound utterly effortless and as we approach treble, the finesse morphs into the delicacy of a nuclear bomb. Perhaps this is what he meant, but I think it's important to detail where these failings are, and that they aren't problematic across the entire spectrum.
Regarding the soundstage, I find it slightly more narrow than the HD600, but a good bit deeper with decent, but not great layering. K550 is similarly deep, and slightly wider, but with not as good layering. HD800, of course, is much wider and much deeper with significantly better layering than any of them. Despite the deference to the HD800, I find the PM-1 entirely engaging in its own way.
Now you are probably thinking 'this HD800 guy can't actually like this warm, rich, liquid, intimate headphone', but the fact is, the specter of my sending these off tomorrow is done with regret. I've listened to the PM-1 almost exclusively during this trial, only putting on other headphones for comparison purposes. I really like these and I can't explain why. They go against many of my ideals of proper sound, mostly neutrality, but somehow manage to connect me to the music in a special way. I've particularly enjoyed the PM-1 with my R+B and Rap collection which has been mostly dormant for many years. I find them to be similar to HD650s in frequency balance, except that whereas the HD650 can't get out of it's own way, the PM-1 as the speed and control to be focused despite the treble deficiency. The PM-1 also lacks the graininess of the HD650 in the vocals.
Just last year I had purchased a set of LCD-2 to be partners with my HD800, but found them distasteful almost right away, despite having heard them several times prior to purchasing. People say the PM-1 and LCD-2 are similar, but I disagree. I think the PM-1 is what Audeze wishes they had with the LCD-2. It is much better in every metric, especially comfort. I also prefer the PM-1 over the other Audeze offerings, including the LCD-X.
Regarding value, yes the PM-1 is not a compelling value argument. It isn't the last word in any aspect of sound, but does match good sound with reasonable physical attributes, and if you consider the cost of the box and premium materials, it is possible to see the $1100 price tag as a worthwhile splurge. I have no need of a fancy box, and while the headphone is attractive and solidly built, I will be interested in trying the PM-2 at a more reasonable price point for the trade-offs present in the PM-1's sound. I am hard to please and harder still to impress, but I have been impressed with Oppo's first release. This is such a better first headphone compared to others in the traditional audio market such as B+W and Focal as well as start up headphone companies like Hifiman (HE-5) that I have to applaud the effort.
Thanks to the owner of these cans, you know who you are!
Associated equipment used:
Matrix X-Sabre
ECP Black Diamond
Sennheiser HD800
Sennheiser HD600
AKG K550