Performance
Build Quality
Ergonomics
Value

AT A GLANCE
Plus
Planar diaphragms
Smooth, sweet, high-res sound
Long and short cables supplied
Minus
Not as airy as some competitive ’phones

THE VERDICT
Planar headphones don’t come cheap, but the Oppo PM-2 is a relatively affordable specimen that sounds beautiful with a variety of content and signal sources.

Planar magnetic headphones have potential advantages over conventional dynamic headphones. Their flat diaphragms have magnets evenly spread across them, driving the entire surface, as opposed to a single coil driving the center of a diaphragm. The result can be greater resolution and phase coherence. But that potential performance edge comes at a price. So headphone fans rejoiced when Oppo—which won positive reviews for its $1,099 PM-1—introduced the PM-2, with some of the same features, at a more affordable price of $699, followed by the even more affordable PM-3 ($399). I’ve been spending much of the past year or so listening to the PM-2.

Performance
Build Quality
Value

Spherical loudspeakers are perhaps too easily dismissed: “Oh look, it’s round. Cute gimmick. Next…” That box speakers are easy to build certainly doesn’t guarantee sound quality. In fact, designers of quality speakers are constantly rebelling against the limitations of rectangular enclosures. To curb cabinet resonance, designers build bracing into the box and stuff the interior with damping material. They curve the sides to stop standing waves from developing between parallel walls. But rather than tweak boxes, some do away with them altogether. So if you think the spherical steel shells of Orb Audio’s People’s Choice satellite speakers are mere gimmicks, think again.