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  • Etymotic ER4SR Reviews

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    Manufacturer: Etymotic
    Model: ER4SR
    Price $: 400

    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



    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



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