{"product_id":"fosi-audio-im4","title":"Fosi Audio IM4","description":"\u003cp\u003eFosi Audio IM4 is an open-back wired in-ear monitor built around a 10mm dual-magnet dynamic driver.\u003c\/p\u003e\u003cp\u003eIts lightweight CNC-aluminum shells, replaceable nozzles and multiple ear-tip tunings combine a spacious presentation with adjustable comfort and sound.\u003c\/p\u003e\u003ch2\u003eWhy it stands out\u003c\/h2\u003e\u003ch3\u003eOpen-back acoustic design\u003c\/h3\u003e\u003cp\u003eReduces enclosed-ear pressure and creates a more spacious presentation than a sealed IEM.\u003c\/p\u003e\u003ch3\u003e10mm dual-magnet driver\u003c\/h3\u003e\u003cp\u003eAn N52 dual-magnet, dual-chamber dynamic driver delivers the full frequency range.\u003c\/p\u003e\u003ch3\u003eTunable fit and sound\u003c\/h3\u003e\u003cp\u003eTwo nozzle materials and three ear-tip styles allow practical adjustment.\u003c\/p\u003e\u003ch3\u003eLightweight detachable construction\u003c\/h3\u003e\u003cp\u003eEach aluminum earpiece weighs about 7g and uses a replaceable 0.78mm 2-pin cable.\u003c\/p\u003e\u003ch2\u003eBest for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eHome and office wired listening\u003c\/li\u003e\n\u003cli\u003eListeners who prefer an open, spacious IEM\u003c\/li\u003e\n\u003cli\u003eLong listening sessions\u003c\/li\u003e\n\u003cli\u003eUsers wanting replaceable cables and tuning accessories\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eNot ideal for\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMaximum passive noise isolation\u003c\/li\u003e\n\u003cli\u003eWireless Bluetooth listening without an adapter\u003c\/li\u003e\n\u003cli\u003eVery quiet public environments where sound leakage matters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eEMiUZEK Buying Notes\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIM4 is open-back, so it isolates less and can leak more sound than a sealed IEM.\u003c\/li\u003e\n\u003cli\u003eThe standard package uses a 3.5mm cable; balanced cables and DS3 bundles depend on the selected variant.\u003c\/li\u003e\n\u003cli\u003eChoose ear tips for both seal and comfort, then compare nozzles at a safe volume.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cstyle\u003e@media (min-width:650px){.pbg__notes .emiuzek-product-content-images{width:calc(148.148% + 50px)!important;margin-left:calc(-48.148% - 50px)!important}}@media(max-width:649px){.pbg__notes .emiuzek-product-content-images{width:100%!important;margin-left:0!important}}.emiuzek-product-content-images img{display:block;width:100%;height:auto}\u003c\/style\u003e\u003cdiv class=\"emiuzek-product-content-images\" style=\"margin:32px 0\"\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioIM4-003.webp?v=1764216548\" alt=\"Open-Back Design\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioIM4-002.webp?v=1764214918\" alt=\"Dual-Magnet Dual-Cavity Driver\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003cp style=\"margin:24px auto\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioIM4-005.webp?v=1764214918\" alt=\"Ergonomic Build for Comfort\" loading=\"lazy\" style=\"display:block;width:100%;max-width:1100px;height:auto;margin:0 auto\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\u003ch3\u003eIs IM4 open-back?\u003c\/h3\u003e\u003cp\u003eYes. It is designed for a more open presentation with reduced isolation.\u003c\/p\u003e\u003ch3\u003eDoes it include Bluetooth?\u003c\/h3\u003e\u003cp\u003eNo. It is a passive wired IEM.\u003c\/p\u003e\u003ch3\u003eCan the cable be replaced?\u003c\/h3\u003e\u003cp\u003eYes, it uses a 0.78mm 2-pin detachable connection.\u003c\/p\u003e\u003ch3\u003eIs a 4.4mm cable included?\u003c\/h3\u003e\u003cp\u003eOnly with the relevant option or bundle; check the selected variant.\u003c\/p\u003e\u003ch3\u003eCan it be used with a phone?\u003c\/h3\u003e\u003cp\u003eYes, when the phone has a compatible output or USB DAC adapter.\u003c\/p\u003e\u003ch3\u003eDoes the DS3 always come in the box?\u003c\/h3\u003e\u003cp\u003eNo. DS3 is included only in specifically named combo variants.\u003c\/p\u003e\u003ch2\u003eHOW TO CONNECT\u003c\/h2\u003e\u003ch3\u003ePhone listening\u003c\/h3\u003e\u003cp\u003eSource icon: phone\u003cbr\u003eSource: Phone \/ tablet\u003cbr\u003eConnection: 3.5mm output or compatible USB DAC\u003cbr\u003eOutput connection: 0.78mm 2-pin cable\u003cbr\u003eTarget icon: headphones\u003cbr\u003eOutput: IM4 earphones\u003c\/p\u003e\u003ch3\u003ePortable DAC system\u003c\/h3\u003e\u003cp\u003eSource icon: phone\u003cbr\u003eSource: USB-C phone \/ player\u003cbr\u003eConnection: USB DAC to 3.5mm or optional 4.4mm cable\u003cbr\u003eOutput connection: Detachable cable\u003cbr\u003eTarget icon: headphones\u003cbr\u003eOutput: IM4 earphones\u003c\/p\u003e\u003ch3\u003eDesktop listening\u003c\/h3\u003e\u003cp\u003eSource icon: computer\u003cbr\u003eSource: PC \/ desktop DAC\u003cbr\u003eConnection: 3.5mm or compatible balanced headphone output\u003cbr\u003eOutput connection: Detachable cable\u003cbr\u003eTarget icon: headphones\u003cbr\u003eOutput: IM4 earphones\u003c\/p\u003e\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\u003ch3\u003eAcoustic design\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eDriver\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e10mm N52 dual-magnet dual-cavity dynamic driver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eDiaphragm\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003ePU beryllium-coated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eDesign\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003eOpen-back in-ear monitor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eImpedance\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e21Ω\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eSensitivity\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e109dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eFrequency response\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e20Hz–20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eConstruction and cable\u003c\/h3\u003e\u003cdiv style=\"width:100%;overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"width:42%;padding:11px;border:1px solid #ddd;text-align:left\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eShell\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e6063 CNC aluminum alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eConnector\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e0.78mm 2-pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eStandard plug\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e3.5mm gold-plated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eCable\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e4-core 392-strand 5N OFC silver-plated copper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\" style=\"padding:11px;border:1px solid #ddd;text-align:left\"\u003eWeight\u003c\/th\u003e\n\u003ctd style=\"padding:11px;border:1px solid #ddd\"\u003e7g ±0.5g per earpiece; 38g ±1g with cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch2\u003eAdditional Product Content\u003c\/h2\u003e\u003ch3\u003eComparison: Which Fosi Audio model is right for you?\u003c\/h3\u003e\u003cdiv style=\"overflow-x:auto\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;min-width:680px\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eIM4\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eDS3 + IM4 combo\u003c\/th\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eIM4 accessory option\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eProduct\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eOpen-back wired IEM\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eIM4 with DS3 portable DAC\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eCable or DAC accessory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eStandard connection\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003e3.5mm\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eUSB-C source through DS3\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eDepends on selected accessory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eBest use\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eDirect wired listening\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003ePortable DAC and gaming system\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eUpgrading cable or phone connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eImportant note\u003c\/th\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eStandard package only\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eOnly named combo variants include DS3\u003c\/td\u003e\n\u003ctd style=\"padding:10px;border:1px solid #ddd;text-align:left\"\u003eAccessory is not a complete IM4 package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e","brand":"Fosi Audio","offers":[{"title":"Obsidian","offer_id":43831742038109,"sku":"Fosi-Audio-IM4-Obsidian","price":446.0,"currency_code":"BRL","in_stock":true},{"title":"Galaxy","offer_id":43831742005341,"sku":"Fosi-Audio-IM4-Galaxy","price":606.0,"currency_code":"BRL","in_stock":true},{"title":"DS3+IM4-Galaxy","offer_id":43831742070877,"sku":"Fosi-Audio-IM4-DS3-IM4-Galaxy","price":834.0,"currency_code":"BRL","in_stock":true},{"title":"DS3+IM4 -0bsidian","offer_id":43831742103645,"sku":"Fosi-Audio-IM4-DS3-IM4-0bsidian","price":1217.0,"currency_code":"BRL","in_stock":true},{"title":"IM4 4.4mm Audio Cable","offer_id":43831742136413,"sku":"Fosi-Audio-IM4-IM4-4-4mm-Audio-Cable","price":199.0,"currency_code":"BRL","in_stock":true},{"title":"IM4 3.5mm Audio Cable","offer_id":43831742169181,"sku":"Fosi-Audio-IM4-IM4-3-5mm-Audio-Cable","price":148.0,"currency_code":"BRL","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0604\/7422\/8829\/files\/FosiAudioIM4-003.webp?v=1764216548","url":"https:\/\/emiuzek.com\/pt-br\/products\/fosi-audio-im4","provider":"EMiUZEK","version":"1.0","type":"link"}