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    • The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    The Open-Back IEM That Lets You Hear More
    Video

    The Open-Back IEM That Lets You Hear More

    $615.00
    Open-Back, All-Day Comfort. 10mm driver, airy stage, balanced tuning for fatigue-free listening. 🎧
    Fosi Audio IM4 Open-Back In-Ear Monitor brings long-lasting comfort and high fidelity together. A 10mm beryllium-coated diaphragm with low distortion delivers dynamic bass and sparkling treble, while balanced tuning keeps vocals and instruments natural across genres. The open-back, dual-chamber design reduces resonance and inner-ear pressure for an airy soundstage that stays relaxed for hours. An N52 dual-magnetic circuit improves response and dynamics. The 4-strand 5N OFC silver-plated cable with gold-plated connector keeps the signal clean. Lightweight CNC 6063 aluminum shells, triple-tunable ear tips, and two swappable nozzles let you tailor fit and sound. Back this project on Kickstarter now.

    About

    Fosi Audio specializes in designing and manufacturing high-quality audio equipment. We offer a wide range of products, including amplifiers, DACs (digital-to-analog converters), and headphone amplifiers, among others. Fosi Audio was founded in 2017 and has quickly gained a reputation for producing affordable yet high-performance audio gear.

    FAQ

    What does it mean to back a project (pledge)?

    When you back a project, you are pre-ordering the product. That means you will get it once it's produced. Besides getting the product itself, you're also joining a community. Follow along the production process, take part in important surveys and give the creator valuable feedback.

    What is Kickstarter?

    Kickstarter is a launchpad for creators to raise funds for the initial production of their invention. Backers (that's you!) can support the creator by pre-ordering the product at a discounted price.

    How do I pledge?

    In order to pledge, click that green button that says Back this project . You will get to select your shipping country and choose your desired pledge level and reward.

    Reviews

    I need it for Sim racing ; Want to try open back iem ; I was looking for new iems ; look like a great product ; I want some hifi in ears, and Fosi is a well known brand for budget but high quality audio products ; Have V3 and love the quality of sound. ; Price allowed me to just try it ; why not? first fosi device - before i buy all the time wiim products ; i like good sound ; I back all fosi ; I have Fosi products, which have been fantastic. I wanted to try an open back IEM and I trust Fosi q ; I’m into audio stuff ; Open back iem is uncommon ; seems like an interesting IEM ; interested in iems for a while ; Because i m4 seems like cool ; To pair a new dap; always interested in innovative and cost effective tech gear ; open backed iems ; open back iem with good tuning ; I like iems, and this open-back one seemed like an interesting listen ; I look a good IEM ; I wanted to enter the IEM space, this seemed like a fantastic opportunity ; I was interested after watching a review on Tiktok. Also the black color looks really nice. ; Love the products, both the IEM and the DAC that y’all are developing ; Need good headphones, like my other fosi products ; been loonibg to get my first pair of IEMs and the fysical tuning made this seem like a good choice ; Open back IEM is unique with the benefit of reduced pressure in the audio canal. The high quality/p ;

    🎁 Support this project & unlock additional 30% off Darwin M2

    The Darwin M2 is a versatile tool for makers and learners—Kickstarter-funded and ready to ship.

    • Coupon code will be revealed after completing a short post-pledge survey
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