Fosi Audio IM4 Open-Back IEM In Ear Kopfhörer silver

Cable
Ratings
BrandMore from Fosi Audio
Delivered between Fri, 22.5. and Sat, 23.5.
2 items ordered
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Product details

The IM4 Open-Back IEM In-Ear Headphones from Fosi Audio deliver an outstanding sound experience thanks to a beryllium-coated 10 mm single dynamic driver. This driver ensures high resolution and a natural transition across all three frequency ranges. The innovative dual-chamber structure and N52 dual-magnet circuit allow for precise sound reproduction. The open design of the headphones creates an airy and relaxed soundscape, making extended listening sessions enjoyable. Weighing only 7 g per headphone and featuring a robust full metal housing made of aluminum alloy, they provide a comfortable fit. The package includes three sets of ear tips in different styles and two types of filters, allowing for personalized sound customization.

  • Beryllium-coated driver for high sound resolution
  • Open design for fatigue-free listening
  • Lightweight aluminum housing for high wearing comfort
  • Includes various ear tips and filters for individual adjustment.

Key specifications

Signal transmission
Cable
Headphone type
In-ear headphones, Over-ear headphones
Isolation
Open

General information

Item number
66740146
Manufacturer
Fosi Audio
Category
Headphones
Manufacturer No.
IM4-S
Release date
29.1.2026
Sales rank in Category Headphones
515 of 8354

Colour

Colour
Silver
Exact colour description
Silver

Material

Material
Aluminium alloy

Headphone properties

Output
Stereo
Signal transmission
Cable

Headphone type

Headphone type
In-ear headphones, Over-ear headphones
Fit
In Ear
Isolation
Open
Driver diameter
10 mm
Magnet type
Neodymium

Voluntary climate contribution

CO₂ emissions
29.26 kg
Climate contribution
CHF 0.70

Scope of delivery

Scope of delivery
3 sets of earbuds, Audio filter, Cable, Carrying case

Product dimensions

Height
1.50 cm
Width
1.50 cm
Weight
7 g

Package dimensions

Length
17.50 cm
Width
13.10 cm
Height
6.50 cm
Weight
276 g

30-day right of return
24 Months Warranty (Bring-in)

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «Headphones» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • Fosi Audio
    Not enough data
  • 1.Digitus
    0 %
  • 2.Sandberg
    0.2 %
  • 3.Sovanos
    0.3 %
  • 4.Havit
    0.4 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • Fosi Audio
    Not enough data
  • 1.-
    0 days
  • 1.1More
    0 days
  • 1.4smarts
    0 days
  • 1.Acefast
    0 days

Return rate

How often is a product of this brand in the «Headphones» category returned?

Source: Digitec Galaxus
  • Fosi Audio
    Not enough data
  • 1.Awei
    0 %
  • 1.ESP
    0 %
  • 1.Onit
    0 %
  • 1.prio
    0 %
Source: Digitec Galaxus