That description is like a high school math problem - “two dual sub-low drivers” (that’s four drivers) and “four dual mid-low drivers” (that’s another eight drivers) - so we’re already up to 12 drivers and we’ve only accounted for the lowest frequencies. Two UE Pro-designed dual sub-low drivers in parallel with four dual mid-low drivers.

After that, there’s an almost month-long wait time while the earbuds are being built and shipped. They’re custom-made to match the shape of your ears, so you’ll need to send UE Pro a 3D scan or have the company send you a custom fit kit that can take an impression of your ear, which you then return to the company. Ultimate EarsĪs you can probably imagine, these IEMs aren’t your standard off-the-shelf fare. The wired earbuds are known as the UE Premiere and they are sold by UE Pro, the Ultimate Ears sub-brand for audio pros and enthusiasts, for $2,999. To be clear, we’re talking about 21 drivers per earbud, or 42 drivers in total. Some earbuds use multiple drivers - three drivers like the kind used by the Status Audio Between 3ANC are becoming more common - while audiophile-targeted IEMs have been known, on rare occasions, to feature as many as 18 drivers.Īnd as insane as that sounds, Ultimate Ears just announced its first set of IEMs with 21 drivers. It’s effectively a tiny little speaker which produces the sound you hear. Inside every set of wireless earbuds or wired earbuds - sometimes known as in-ear monitors or IEMs - is a driver.

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