Like most Oppo products the PM-1 headphones are rather well built, as What Hi-Fi notes they are "gorgeous" and "lavish, with attention to detail." Fortunately, that premium pedigree doesn't mean a premium weight, with About saying they fit "comfortably" since they are actually lighter than some competing headphones, "without the slightest hint of listening fatigue" even after hours of use.
However, because of their open-backed style it should be no surprise the PM-1 headphones have a few sound isolation problems, with Audioholics noting that "leakage was evident ... but not nearly as loud" as expected. But the open back design actually works in the headphones' favor, offering "flawless sound quality," according to TechRadar. What Hi-Fi says the sense of scale is "huge," with a "spacious and airy" feel meaning music doesn't "sound like itâ€™s stuck between your ears."
The PM-1's will make headphone enthusiasts very happy, and will last you a long time for the money you spend. The comfortable lightweight design and open soundstage put the them alongside some of the best headphone options out there -- you just need to lay out a serious wad of cash for the experience.