Etymotic ER4SR High-Fidelity Studio Reference Earphones with Balanced Armature Technology

Over 30 years ago, Etymotic invented noise-isolating, in-ear earphones. Etymotic’s original design, using balanced armature technology, was initially developed for auditory research and hearing testing, and has established them as the top-rated choice for accurate in-ear monitoring. As the pioneering high-fidelity, noise-isolating in-ear earphones, ER4 earphones set the benchmark for response precision that the competition strives to match. The ER4SR model provides sound precision and high output, ensuring an immersive high-definition listening experience.