Fosi Audio IM4 Open‑Back Wired Earbuds – All‑Day Comfort for Work, Commute, or Home
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Features
- Power sound with 10mm driver
- Boost dynamics via N52 magnets
- Expand space with open-back design
- Perfect Pairing with DS3 Mini Audio DAC
- IM4 IEM Accessories: 4.4mm Balanced, 3.5mm with Mic
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24 Months Warranty
30-Day Money-Back Guarantee
Lifetime Customer Support
Fosi Audio IM4 Open‑Back Wired Earbuds – All‑Day Comfort for Work, Commute, or Home
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
We offer free worldwide shipping, except for certain regions such as Ukraine and Russia, where our services are currently unavailable.
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Customer Support
WhatsApp: +8613716612254
support@fosiaudio.com
Mon-Fri: 3:00 AM - 3:00 PM PST -
FAQ’s
If you have any questions, please refer here: FAQs
Wired Is Cool Again
wired is cool again
hear more detail
open-back design.
clearly immersive.
find the sound
that fits you
tuned for
long listening
all-day comfort
ergonomic fit for your ears
7g lightweight
design
skin-friendly finish
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Product details
Description
- 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