Etymotic Research ER4SR Reference Earphones Etymotic Research This package offers an unparalleled

This package offers an unparalleled listening experience

While at first glance it may seem correct to select an ergonomic shape and hold it in place with the elasticity of silicone

This configuration delivers a unique and charming sound

making them a perfect companion to your existing setup no matter if you’re working in a professional studio

Following these came the E5000 / E4000 re-cable models

Etymotic Research ER4SR Reference Earphones Etymotic Research This package offers an unparalleledOverview ER4SR is the highest performing single driver in ear monitor. The IEM shells are made of anodized aluminum, CNC machined with extremely tight tolerances. Using a single Balanced Armature (BA) driver allows for extremely accurate IEM without the added complexity of crossovers, and helps keep the aluminum body small and slim. The included high quality user replaceable cable is reinforced and twisted, to improve longevity and durability.