Etymotic Research ER4S microPro Precision Matched Balanced Armature Driver In-Ear Earphones 689604125403 Bring to a boil

Bring to a boil

An easy-eject mechanism on the handle clears the head between uses for quick and easy cleanup

Necked-down center electrode fires quicker and cleaner

assembly and testing processes adhere to DOT and SAE automotive industry quality and safety standards

03 Color Black

Etymotic Research ER4S microPro Precision Matched Balanced Armature Driver In-Ear Earphones 689604125403 Bring to a boilBrand Etymotic Research Model ER4S Color Black Size N A High performance balanced armature drivers are precision matched to within 1 dB Designed to compensate for the high frequency emphasis in recordings Popular with musicians recording engineers and audiophiles; can be used with a headphone amplifier if desired Braided cables for reduced microphonic effect Includes an assortment of eartips for a comfortable fit and carrying case True high fidelity