The rear chamber is filled with sound-damping material to eliminate resonance peaks and harshness.
Ergonomic Build for Comfort
A Universal, comfortable fit, engineered from millions of ear scans for a secure and lightweight feel.
Ergonomic Design
Balanced Tuning Across Genres
Punchy bass, clear mids, and a spacious, sibilance-free treble. The IM4 is tuned for relaxed listening.
Balanced Tuning
Picture 1 without Ear Tips
Picture 2 with Balanced Ear Tips
Picture 3 with Bass Ear Tips
Picture 4 with Deep Bass Ear Tips
Orange line: Aluminum alloy Tube
Red line: Brass Tube
Enjoy All-day Comfort
Each earbud weighs only 7g, ensuring pressure-free comfort for long listening.
Hollow Structure Design
Two Bold Finishes
Black exudes understated elegance, while silver shines with refined brilliance.
Elegant Colors
Product details
- Dual Magnet & Dual Chamber for Hi-Fi Sound: Experience audiophile clarity. Our IEM earphones feature an N52 dual magnet for powerful control and a dual-chamber design for balanced sound,The 10mm beryllium driver delivers wide soundstage and crisp details.
- Balanced & Fatigue-Free Tuning:The open-back design and acoustic damping wool reduce resonance and harshness, creating a relaxed, wide sound. The hifi earbuds are expertly tuned for balanced bass, mids, and treble, making them ideal for audiophiles.
- Ergonomic & Lightweight Comfort: Designed for all-day comfort. Its housings feature a smooth metal finish that's hypoallergenic and pleasant to the touch. With each earpiece weighing only 7g, these are among the most comfortable in-ear monitors for extended wear.
- Premium CNC Aluminum crafts:Show Excellent build quality and minimalist aesthetics. The shell is precision-machined from a block of aluminum. The unique orange metal grille and logo add a distinctive, setting IEMs apart in both style and substance.
- Customizable Sound & Detachable Cable:Tailor your audio experience. The IEMs set includes 3 types of eartips (Bass, Deep Bass, Balanced) and two sound nozzles (Brass, Aluminum) to fine-tune bass and treble. The 2-pin 0.78mm detachable cable to 3.5/4.4mm.
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
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
What‘s in the box？
- Fosi Audio IM4 Earphones
- 3.5mm Cable
- Carrying Pouch
- User Manual
- Quick Guide
- Brass Nozzle
- Balanced Ear Tips
- Bass Ear Tips
- Deep Bass Ear Tips
1 year warranty
