{"product_id":"fosi-audio-psu20-linear-power-supply-5v-12v-15v-hifi-audiophile-dc-usb-audio-copy","title":"Fosi Audio IM4 Open‑Back Wired IEM Earphones Dual Magnet \u0026 Dual Chamber for Hi-Fi Sound","description":"\u003cp\u003eExperience a more spacious and engaging listening experience with the Fosi Audio IM4, an open-back IEM designed for listeners who want detailed sound, strong instrument separation, and a natural sense of space in a compact in-ear design.\u003c\/p\u003e\n\u003cp\u003eFosi IM4 is a 10mm N52 dual-magnet, dual-cavity dynamic driver with a PU beryllium-coated diaphragm. Combined with its open-back acoustic design, the IM4 delivers an airy presentation with clear separation and lively dynamics. Independent listening tests highlight its spacious soundstage, fast bass response, clean detail retrieval, and strong overall coherence.\u003c\/p\u003e\n\u003cp\u003eThe IM4 also gives you control over its sound. Two interchangeable nozzles, aluminum and brass, allow you to adjust the character of the presentation, while three types of ear tips are included in multiple sizes: Balanced, Bass, and Deep Bass. This makes it easier to fine-tune both the sound and fit to suit your preferences.\u003c\/p\u003e\n\u003cp\u003eBuilt from precision-machined 6063 CNC aluminum alloy, each earpiece weighs approximately 7g. The lightweight construction and open-back design help provide a comfortable fit for extended listening sessions.\u003c\/p\u003e\n\u003cp\u003eA detachable 0.78mm 2-pin cable is included, featuring 392-strand 5N OFC silver-plated copper construction and a gold-plated 3.5mm plug. The cable can be replaced or upgraded as your setup evolves.\u003c\/p\u003e\n\u003cp\u003eKey Features:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOpen-back in-ear monitor design for an airy, spacious presentation\u003c\/li\u003e\n\u003cli\u003e10mm N52 dual-magnet, dual-cavity dynamic driver\u003c\/li\u003e\n\u003cli\u003ePU beryllium-coated diaphragm\u003c\/li\u003e\n\u003cli\u003eInterchangeable aluminum and brass tuning nozzles\u003c\/li\u003e\n\u003cli\u003eThree ear-tip profiles: Balanced, Bass, and Deep Bass\u003c\/li\u003e\n\u003cli\u003e6063 CNC aluminum alloy shells\u003c\/li\u003e\n\u003cli\u003eDetachable 0.78mm 2-pin cable\u003c\/li\u003e\n\u003cli\u003e109dB sensitivity and 21Ω impedance\u003c\/li\u003e\n\u003cli\u003e20Hz–20kHz frequency response\u003c\/li\u003e\n\u003cli\u003eApproximately 7g per earpiece\u003c\/li\u003e\n\u003cli\u003e3.5mm gold-plated audio connector\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhat’s Included:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFosi Audio IM4 IEMs\u003c\/li\u003e\n\u003cli\u003e3.5mm detachable cable\u003c\/li\u003e\n\u003cli\u003eBalanced ear tips\u003c\/li\u003e\n\u003cli\u003eBass ear tips\u003c\/li\u003e\n\u003cli\u003eDeep Bass ear tips\u003c\/li\u003e\n\u003cli\u003eAluminum nozzle\u003c\/li\u003e\n\u003cli\u003eBrass nozzle\u003c\/li\u003e\n\u003cli\u003eCarrying pouch\u003c\/li\u003e\n\u003cli\u003eUser manual and quick guide\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Stars Picker Audio Library","offers":[{"title":"Default Title","offer_id":46901904801989,"sku":"900944","price":409.96,"currency_code":"MYR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0577\/8748\/2309\/files\/ShopifyProductpages_28.png?v=1789195977","url":"https:\/\/starspickeraudio.net\/products\/fosi-audio-psu20-linear-power-supply-5v-12v-15v-hifi-audiophile-dc-usb-audio-copy","provider":"Stars Picker Audio Library","version":"1.0","type":"link"}