1-Year Official Warranty by Fosi Auido Malaysia
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Fosi Audio IM4 Open-Back In-Ear Monitor
[ PRODUCT DESCRIPTION ]
Upgrade your listening experience with the Fosi Audio IM4 Open-Back IEM — designed to deliver a spacious, natural sound unlike typical in-ear monitors. The unique open-back design creates a wider, more airy soundstage for a speaker-like experience.
Equipped with a 10mm beryllium-plated dynamic driver and N52 dual magnets, the IM4 produces deep controlled bass, clear vocals, and crisp highs with balanced tuning for long, fatigue-free listening. The CNC aluminum housing is lightweight, durable, and comfortable for extended wear.
With interchangeable tuning nozzles and multiple ear tips included, you can personalize the sound to suit your preference.
✨ Open-Back Spacious Sound
✨ 10mm Dynamic Driver
✨ Customizable Tuning
✨ Premium & Comfortable Build
[ KEY FEATURES ]
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Open-back design for a spacious soundstage – feels more like listening to speakers than typical closed IEMs, with wider, airier presentation.
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High-performance 10 mm beryllium-plated driver with N52 dual magnets – delivers clear, detailed sound with dynamic, controlled bass and crisp highs.
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Customizable sound tuning – includes swappable nozzles and multiple ear tips (balanced, bass, deep bass) for tailored listening.
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Premium build and comfort – CNC-machined aluminum housing and ultra-lightweight 7 g per earbud design make them comfortable for long sessions.
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Balanced tuning for extended listening – relaxed, fatigue-free sound signature that works well across genres without harshness.
[ FAQs ]
Is the IM4 suitable for gaming?
➤ Yes. The open-back design provides a wider soundstage, making footsteps and positioning clearer.
Does it have strong bass?
➤ Yes, it delivers deep and controlled bass, and you can adjust the sound using the included tuning nozzles.
Is the sound leaking because it’s open-back?
➤ Yes, slight sound leakage is normal due to the open-back design. It’s best used in quiet environments.
Can it be used with smartphone?
➤ Yes, it works with smartphones, laptops, tablets, and portable DACs (3.5mm connection).
Does it come with a microphone?
➤ Please check the selected variant. Some versions may not include an inline mic.
Is it comfortable for long hours?
➤ Yes, the lightweight aluminum housing is designed for extended listening comfort.
What driver does it use?
➤ It features a 10mm beryllium-plated dynamic driver with dual-magnet design.
Can I change the cable?
➤ Yes, it uses a detachable cable design for easy upgrade or replacement.
Is it suitable for outdoor use?
➤ It can be used outdoors, but open-back design means less noise isolation compared to closed IEMs.
What is included in the box?
➤ IM4 earphones, detachable cable, multiple ear tips, tuning nozzles, and user manual (subject to official packaging).
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