{"product_id":"etymotic-er4xr-er4sr","title":"Etymotic ER4XR \/ ER4SR In-Ear Monitors — Single BA, 35–42dB Isolation, MMCX","description":"\u003cp class=\"tp-summary\"\u003eThe Etymotic ER4XR \/ ER4SR is a wired in-ear monitor with one balanced armature per channel, left and right channels matched within 1dB from 100Hz to 10kHz, and 35–42dB of passive isolation, offered in flat ER4SR or bass-lifted ER4XR tuning. It suits sound engineers, mixing technicians and critical listeners who want accuracy and strong passive isolation.\u003c\/p\u003e\n\u003ch2\u003eWho the Etymotic ER4XR \/ ER4SR is for\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMixing and reference listening:\u003c\/strong\u003e The ER4SR is tuned to be as precise and flat as possible, and every pair ships with a channel-matching compliance certificate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA little more low end:\u003c\/strong\u003e The ER4XR adds 1–2dB below 200Hz and 3–4dB below 100Hz while keeping the ER4SR's mids and highs, and Etymotic says it is not bass heavy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoisy commutes and flights:\u003c\/strong\u003e Etymotic rates the passive isolation at 35dB with silicone tips and 42dB with foam tips, and puts most custom IEMs at about 25–28dB.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong-term ownership:\u003c\/strong\u003e CNC-machined anodized aluminum shells pair with a reinforced, twisted cable that detaches at customized MMCX connectors, and the ACCU-Filters are user-replaceable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSkip it if:\u003c\/strong\u003e you dislike deep-fitting eartips or want other brands' cables: Etymotic says the 35–42dB rating depends on eartips and insertion depth, and that its customized MMCX connector is unlikely to work with other makers' cables.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEtymotic ER4XR \/ ER4SR key specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersions:\u003c\/strong\u003e ER4XR Extended Response or ER4SR Studio Reference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDriver:\u003c\/strong\u003e Single high-performance balanced armature per channel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTuning:\u003c\/strong\u003e ER4SR flat; ER4XR adds 1–2dB below 200Hz and 3–4dB below 100Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency response:\u003c\/strong\u003e 20Hz–16kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImpedance:\u003c\/strong\u003e 45Ω @ 1kHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensitivity:\u003c\/strong\u003e 98dB @ 1kHz, 1mW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum output:\u003c\/strong\u003e 122dB SPL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNoise isolation:\u003c\/strong\u003e 35dB with silicone tips, 42dB with foam tips\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChannel matching:\u003c\/strong\u003e Within 1dB from 100Hz to 10kHz; compliance certificate included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable:\u003c\/strong\u003e Detachable reinforced, twisted 5 ft cable, customized MMCX connectors, 3.5mm gold-plated plug\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"tp-trust\"\u003eGenuine Etymotic stock. Free shipping on every order, 45-day returns.\u003c\/p\u003e","brand":"Etymotic","offers":[{"title":"ER4XR Extended Response","offer_id":46347628609671,"sku":"Etymotic ER4XR-","price":331.99,"currency_code":"USD","in_stock":true},{"title":"ER4SR Studio Reference","offer_id":46347628642439,"sku":"Etymotic ER4SR-","price":331.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0756\/5833\/0247\/files\/7616376736.jpg?v=1793194790","url":"https:\/\/tonepier.com\/products\/etymotic-er4xr-er4sr","provider":"TonePier","version":"1.0","type":"link"}