In a Class by ItselfEtymotic invented noise-isolating, in-ear earphones. The ER4 MicroPro series earphones were the first earphones commercialized using balanced armature technology and are recognized as the world leader in response accuracy, to which all other earphones are compared. After more than 20 years, these reference-quality earphones are still the choice of serious sound engineers, audiophiles and musicians.
Backed by decades of research and development for the ear
World leader in sound reproductionUnsurpassed frequency response accuracy and sound quality — 92%+ response accuracy from 20 Hz – 16 kHzThe only earphones with balanced-armature, precision-matched, custom-tuned driversHighest output sensitivity in its classTimeless style and fit
Professional quality and reliabilityAn assortment of noise-isolating eartip options to ensure proper seal and comfortCUSTOM•FIT option availableHighest noise isolation
First earphones to completely seal the ear98% (35 dB - 42 dB) noise isolation —highest of any earphones or headsets on the market todayReduction of outside noise reduces the risk of listening at unsafe levelsBest durability and warranty
2-year replacement warrantyUser-replaceable filters protect the balanced-armature drivers from ear waxWhat’s In the Box?EarphonesDetachable, 5 ft. cord with 3.5mm gold plated stereo plug¼” stereo phone adaptorAssortment of eartipsFilter removal tool and replacement filtersShirt clipZippered storage casePerformance certificate
- FOR MUSIC LOVERS - Balanced-armature drivers are precision-matched and custom-tuned to within an industry leading 1dB across frequencies from 100Hz to 10KHz.
- VERSITLE & DURABLE - Detachable 5 ft. cord with 3.5mm gold plated stereo plug is Kevlar reinforced for durability and braided for extremely low microphonic effect.
- AUDIOPHILE APPROVED - Uncompromising accuracy in the midrange and high frequencies, extended bass response for extra presence in the lower range.
- LONG LASTING - User-replaceable filters protect the balanced-armature drivers from ear wax. An assortment of noise-isolating eartip options ensure proper seal and comfort. 2 year replacement warranty.
- INCLUDES - Etymotic Research ER4XR In-Ear Monitors, Blucoil Earbuds and Blucoil 6-ft 3.5mm headphone extender.
