With the release of the CK100, Audio Technica have reinvented the inner earphone. Their former flagship portable, the dual-driver CK10 is a thing of neutral, fast, and airy beauty. But no matter how good it is, its younger, pricier sibling hurdles it in every imaginable way. The CK100 houses 3 balanced armature speakers per earphone from which a brilliant atmospheric sound haunts. For audiophiles looking for a high-quality, good-sounding inner earphone, there is none better for the price.