Fosi Audio IM4 Open-Back IEM Earphones 10mm Dynamic Driver

Overview

The Fosi Audio IM4 is a headphone / IEM product designed for desktop, apartment, and living-room systems that need compact HiFi performance and practical connectivity. Open-back wired IEMs with 10mm dynamic driver and detachable 2-pin cable for audiophile and gaming use.

Built for listeners who want measurable performance without a bulky AV receiver, the IM4 focuses on clean power, useful I/O, and strong value. Standout points include Open-back in-ear monitors with N52 dual magnets; 10mm single dynamic driver; Detachable 0.78mm 2-pin cable, 3.5mm plug. Use this product page to compare specs and photos before you buy on Amazon.

Key Features

• Open-back in-ear monitors with N52 dual magnets
• 10mm single dynamic driver
• Detachable 0.78mm 2-pin cable, 3.5mm plug
• Comfortable for long listening and studio sessions

Who It's For

Audiophiles and gamers who want detailed, comfortable listening with a detachable or open-back design for desktop monitoring, commuting, or long sessions. Pair the IM4 with a Fosi DAC/AMP when you want a complete headphone chain.

Setup & Connectivity

Everyday use is simple: expect headphone outputs for IEMs and over-ear cans, phono-ready or vinyl-friendly I/O for turntable chains. Review the photos and feature list on this page, then buy through Amazon when you are ready — the same Fosi Audio hardware sold on the official store.

Why Choose the IM4

Choose the Fosi Audio IM4 when you want open-back in-ear monitors with n52 dual magnets for detailed personal listening. It sits in the same product family as Fosi’s popular TPA3255 amplifiers, balanced DAC preamps, and gaming DAC/AMPs — compact components that punch above their price on Amazon and the official Fosi Audio catalog.

Why Fosi Audio

Fosi Audio builds compact HiFi amplifiers, DACs, and desktop audio gear that punch above their price. Fosi Audio headphones and IEMs pair naturally with the brand’s DAC/AMPs for detailed, comfortable personal listening. Shop the same products featured on Amazon with specs and photos collected here for easy comparison.

Compare & explore

Browse more headphones, compare with Fosi Audio i5 Open-Back Planar Magnetic Headphones 97mm, or explore DAC & amp models for source components.