ER4® XR
Extended Reference Earphones
Musical Instruments - Sheet Music

Item Number: 20382926
5 out of 5 Customer Rating
$349.00
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SKU: HL.214954

Extended Reference Earphones. Etymotic. Monitors & Headphones. Hal Leonard #ER4XR. Published by Hal Leonard (HL.214954).

UPC: 846430002029. 6.25x9.25x2.5 inches.

Over 30 years ago, Etymotic invented noise-isolating, in-ear earphones. Etymotic's original design, developed for auditory research and hearing testing, used balanced – armature receivers and established these speakers as the gold standard for high-definition, in-ear earphones. ER4 earphones were the first high-fidelity, noise isolating in-ear earphones to use this technology in a consumer earphone, and are recognized as the world leader for response accuracy to which all other earphones are compared.