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Some audiophiles consider Focal’s $180,000-per-pair Grande Utopia EM to be the world’s finest speaker. The Spirit One, Focal’s first headphone, weighs about 99.9% less and costs about 99.8% less. Yet its brushed aluminum metal parts, matte black soft-touch finishes, and detachable cord with a woven cover convey some of the Utopias’ high-end vibe.

If you’re sick of trying to choose among dozens of lookalike IEMs in the racks at electronics stores, you’ll find the C5 to be welcome relief. This IEM resembles nothing else on the market. The back of each titanium earpiece holds B&W’s Micro Porous Filter, a layer of hundreds of tiny steel balls that the company says works as a sonic diffuser.

When PSB’s Paul Barton recently called me to chat about headphone measurement, it soon became apparent that he’d read every scientific paper ever written about headphones. The first headphone to which Barton brings his ultra-scientific approach is the M4U 2, a noise-canceling model poised to go up against the likes of the Bose QC15.

With so many companies slapping their brand on generic IEMS, what’s an easy way to tell who’s serious about sound? Look to the guys selling IEMs with balanced armatures. Most IEMs use dynamic drivers, tiny versions of the drivers in box speakers, but a balanced armature is more like a little motorized teeter-totter that drives a diaphragm.