Etymotic Research ER4XR High-Fidelity Earphones with Extended Response

Over 30 years ago, Etymotic pioneered noise-isolating, in-ear earphones. Originally developed for auditory research and hearing testing, Etymotic’s design utilized balanced armature receivers, setting the standard for high-fidelity, in-ear earphones. As the first high-definition, noise-isolating earphones for consumers, ER4 earphones are renowned for their response accuracy, making them a benchmark in the industry. The ER4XR model delivers uncompromising midrange and high-frequency accuracy while enhancing presence in the lower end, ensuring a rich and detailed listening experience.