KZ ZS12 PRO X In-Ear Monitors vs Binary EP321 MEMS

Pick the KZ ZS12 PRO X if you need one set for stage, studio and phone use: it is wireless, has touch controls, six drivers per side and a tuning switch, and 43 ratings average 4.3. Pick the Binary EP321 MEMS if you listen critically at a desk or with a balanced source and want the brightest, widest, most detailed treble in this class. The KZ wins on features and flexibility; the Binary wins on treble detail and soundstage, but its lean tone and bright top end tire treble-sensitive ears, and owners say its shells feel a bit cheap.

• Choose the KZ ZS12 PRO X if you want a wireless, tunable hybrid IEM for stage, DJ and everyday listening from a phone.
• Choose the Binary EP321 MEMS if you want wired, bright, airy detail and a wide soundstage and have a 4.4 mm balanced output.