The Etymotic ER-4PT Chris Marksbury/Etymotic. ER-4 headphones are still made in Etymotic's Elk Grove Village, Ill., factory, and the left and right drivers are hand-matched to within 1 dB of each.. When you actually get one of the Etymotic's 6 different tip styles, all of which are included, to fit properly into your ears, they hold snugly in your ear canal. With the included shirt clip there's no tugging to deal with either. However, even with the correct tip, they still feel really annoying in your ears, and opening your mouth.
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Welcome to the Etymotic Research ER-4PT. Etymotic Research is one of the most enduring names in the audio industry. Founded in 1983 by Mead Killion and Edwin DeVilbiss, Etymotic Research originally made its name producing hearing aids and other related equipment.. Included with every pair of ER•4PT earphones is an industry-exclusive channel-matching compliance graph, signed by the Etymotic engineer who precision matched and custom tuned the balanced.
