Home Slickdeals Etymotic Research ER4XR Extended Response Precision Matched in-Ear Earphones $270 @ Amazon Slickdeals Etymotic Research ER4XR Extended Response Precision Matched in-Ear Earphones $270 @ Amazon By ARCOM - 6 April 2019 143 0 SHARE Facebook Twitter Go to the deal page: Etymotic Research ER4XR Extended Response Precision Matched in-Ear Earphones $270 @ Amazon