ER4® Earphones
Quick Overview
Over 30 years ago, Etymotic invented noise-isolating, in-ear earphones. Etymotic’s original design, developed for auditory research and hearing testing, used balanced –armature receivers and established these speakers as the gold standard for high-definition, in-ear earphones. ER4 earphones were the first high-fidelity, noise isolating in-ear earphones to use this technology in a consumer earphone, and are recognized as the world leader for response accuracy to which all other earphones are compared.
World leader in sound reproduction
Unsurpassed frequency response accuracy and sound quality — 92%+ response accuracy from 20 Hz – 16 kHz
The only earphones with balanced-armature, precision-matched, custom-tuned drivers
Highest output sensitivity in its class
Features
Professional quality and reliability
Precision-matched, custom-tuned drivers
Precision machined metal bodies with anodized finish
Detachable, reinforced 5 ft. cable with 3.5mm gold plated stereo plug and MMCX connectors
Assortment of noise-isolating eartip options to ensure proper seal and comfort
Highest noise isolation
First earphones to completely seal the ear
98% (35 dB - 42 dB) noise isolation —highest of any earphones or headsets on the market today
Reduction of outside noise reduces the risk of listening at unsafe levels
Best durability and warranty
2-year replacement warranty
User-replaceable filters protect the balanced-armature drivers from ear wax
