IM4
Class-D Amp
Fosi Audio i5 — open-back planar magnetic headphones with 97mm diaphragm, CNC metal, and walnut wood cups for studio HiFi.
The Fosi Audio i5 is a headphone / IEM product designed for desktop, apartment, and living-room systems that need dedicated headphone amplification. Open-back planar magnetic headphones with 97mm diaphragm, CNC metal, and walnut wood cups for studio HiFi.
Built for listeners who want measurable performance without a bulky AV receiver, the i5 focuses on clean power, useful I/O, and strong value. Standout points include 97mm ultra-large planar magnetic diaphragm; CNC metal and walnut wood open-back design; Wired audiophile headphones for multi-source setups. Use this product page to compare specs and photos before you buy on Amazon.
Audiophiles and gamers who want detailed, comfortable listening with a detachable or open-back design for desktop monitoring, commuting, or long sessions. Pair the i5 with a Fosi DAC/AMP when you want a complete headphone chain.
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.
Choose the Fosi Audio i5 when you want 97mm ultra-large planar magnetic diaphragm 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.
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.
Browse more headphones, compare with Fosi Audio IM4, or explore DAC & amp models for source components.