Fosi Audio IM4

Brand: Fosi Audio

₹13,950.00

The Fosi Audio IM4 is an open-back wired earphone designed for a spacious, airy listening experience. Featuring a 10mm beryllium-coated dynamic driver, N52 magnets and a vented aluminium housing, it combines lightweight CNC-machined construction with swappable acoustic nozzles and custom ear tips for personalised sound tuning and comfortable everyday listening.

IM4

Fosi Audio IM4

The Fosi Audio IM4 combines a 10mm beryllium-coated dynamic driver with powerful N52 magnets and an open-back acoustic design to create a wide and spacious sound presentation. Its vented housing helps expand the perceived soundstage, while the CNC-machined aluminium construction keeps the earphones lightweight and durable. Swappable acoustic nozzles and custom ear tips allow listeners to fine-tune fit and sound character according to preference. Designed for wired Hi-Fi listening, the IM4 can be paired with compatible portable DACs such as the Fosi Audio DS3 and supports both balanced and standard cable options.

IM4

Details & Specifications

Driver & Acoustic Design

Brand	Fosi Audio
Model	IM4
Product Type	Open-Back Wired Earbuds / IEMs
Driver Type	Dynamic Driver
Driver Size	10mm
Driver Coating	Beryllium-Coated
Magnet Type	N52
Acoustic Design	Vented Open-Back

Construction & Fit

Housing Material	CNC-Machined Aluminium
Design	Lightweight
Ear Tips	Custom Ear Tips
Acoustic Nozzles	Swappable
Fit Customisation	Supported

Sound & Tuning

Soundstage Design	Wide / Airy Open-Back Presentation
Dynamic Enhancement	N52 Magnet System
Sound Tuning	Swappable Acoustic Nozzles
Listening Style	Wired Hi-Fi Listening

Cable & Connectivity

Connection Type	Wired
4.4mm Balanced Option	Available
3.5mm Cable with Microphone	Available
Portable DAC Pairing	Compatible with Fosi Audio DS3

Accessories

4.4mm Balanced Cable	Available Accessory
3.5mm Cable with Microphone	Available Accessory
Swappable Acoustic Nozzles	Included / Supported
Custom Ear Tips	Included / Supported

Downloads

About Fosi Audio

Fosi Audio develops audio products focused on making high-quality listening systems accessible, practical and easy to integrate into modern Hi-Fi setups. Its product range combines compact engineering, straightforward functionality and contemporary design for music enthusiasts building both desktop and home audio systems. With products spanning amplification, digital audio and analogue playback, Fosi Audio places emphasis on flexible system building and user-friendly performance. Its range is designed to support listeners seeking compact, versatile and capable components for modern stereo and personal audio systems.

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