THE LATEST RELEASE from Audeze, the iSine 20, takes technology typically found only in over-ear headphones and squeezes it into a pair of ultra-portable earbuds. While that’s certainly commendable, people accustomed to regular earphones—which comfortably envelop the ears—must make some compromises. And at $600, there’s no easy buy-in. But with the right tunes and the right setting, it becomes clear that what Audeze has done borders on miraculous.