Feature

1. Dual-Magnet Dual-Cavity Driver
The Fosi Audio IM4 features a dual-magnet dual-cavity driver that delivers great resolution and high impulse fidelity. This design ensures the purity of sound and a wide dynamic range, allowing you to enjoy the clarity and depth of every note.

2. Open-Back Design
The open-back design of the IM4 creates an open, natural soundstage, ensuring that you won't experience fatigue even during extended listening sessions. This design makes music sound more natural and provides a more comfortable listening experience.

3. Balanced Tuning across Genres
Carefully tuned for long listening sessions with natural sound across various music genres, the IM4 delivers a natural sound that keeps your ears comfortable for hours. Whether it's pop, rock, or classical, it provides a balanced and enjoyable listening experience.

4. Ergonomic Build for Comfort
Weighing only 7 grams, the IM4 is designed with an ergonomic build ideal for all-day wear. Its lightweight design and comfortable earbuds ensure that you won't feel discomfort even after prolonged use.

5. CNC Aluminum Alloy Housing
The IM4 features a CNC aluminum alloy housing that is not only refined in appearance but also skin-friendly with a premium texture. This high-quality material and craftsmanship ensure the durability and premium feel of the earphones.

Specifications

Shell Material：6063 CNC Aluminum Alloy
Driver Unit：
10 mm N52 Dual-Magnet
Dual-Cavity Dynamic Driver
Diaphragm：PU Beryllium-coated Diaphragm
Sensitivity：109dB/mW
Impedance：21Ω
Frequency Response：20Hz-20kHz
Cable：
4-core 392-strand 5N OFC Silver-plated Copper Cable
Connector：2-PIN 0.78mm
Audio Jack：3.5 mm Gold-plated Plug
Weight (per earbud)：7g ±0.5g
Weight (incl. cable)：38g ±1g