Etymotic ER-4XR

High performance Balanced Armature drivers are precision matched to within 1 dB Transducers: Single high-performance balanced armature per channel. Specially designed for uncompromising accuracy in the mid to high frequencies with a bit of extra presence in the lower end Sleek, anodized, laser etched aluminum body and braided, reinforced detacha... moreble 5 ft. Cables with custom MMCX connectors 35-42 dB of noise isolation with a max output of 122 dB

Part of the ER4® reference earphone series developed for auditory research and hearing testing by Etymotic Research—inventors of noise-isolating in-ear earphones—the ER4XR (EXtended Response) use balanced–armature receivers. This technology, offered in a consumer earphone here first, has established them as the gold standard f... moreor high-definition, in-ear earphones. The ER4XR models features extended bass response—made for music lovers and hi-fi enthusiasts who want to experience uncompromising precision in the midrange and high frequencies, but also appreciate a bit more added presence in the lower end. Like the ER4SR models (sold separately), the ER4XR is designed and built with precision machined, anodized, laser-etched aluminum bodies, and feature user-replaceable, detachable cables. They also employ the same stringent channel-matching standard used in the ER4SR models. The ER4XR is great for anyone seeking exceptional sound quality along with just the right amount of low-end enhancement. They're a member of the family of earphones that is recognized as the world leader for signal response accuracy to which all other earphones are comparedEtymotic Research Inc ER4XR Includes:ER4XR earphonesDetachable, 5ft cord with 3.5mm gold-plated stereo plug¼" stereo phone adapterAssortment of eartipsFilter removal tool and replacement filtersShirt clipZippered storage casePerformance certificateEtymotic Research Inc ER4XR Features:Unsurpassed 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 classProfessional quality and reliabilityEnhanced and extended bassMetal bodies with anodized finishAn assortment of noise-isolating eartip options to ensure proper seal and comfortCUSTOM•FIT option available (see below)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 levels2-year replacement warrantyDetachable cables allow for easy replacement and customizationUser-replaceable filters protect the balanced-armature drivers from earwaxEtymotic Research Inc ER4XR Specifications:Frequency Response: 20 Hz - 16 kHzTransducers: High performance, balanced armature micro-driversNoise Isolation: 35 - 42 dBImpedance (@1 kHz): 45 OhmsSensitivity (@1 kHz) SPL at 0.1v: 98 dBMaximum Output (SPL): 122 dBCable: 5ft, detachableUser Replaceable ACCU-Filters: YesWarranty: 2 YearsCUSTOM•FIT Option: Available (see note below)Note:In an industry exclusive, every pair of ER•4 earphones includes a channel-matching compliance graph signed by the Etymotic engineer who precision-matched and custom-tuned the balanced-armature drivers.Etymotic offers a cost-effective CUSTOM•FIT solution to make your favorite earphones the