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Highlights:• Open-Back In-Ear Monitor With Spacious And Natural Soundstage• 10 mm PU Beryllium-Coated Dynamic Driver With N52 Dual Magnet • Dual-Chamber Acoustic Design With Nine-Port Front Cavity • Interchangeable Sound Nozzles In Aluminum And Brass • 2-Pin 0.78 mm Detachable 5N Silver-Plated OFC Cable • Lightweight CNC-Machined Aluminum, Only 7 g Per Earbud • Three Sets Of Tuning Ear Tips In Multiple Sizes Open And Immersive HiFi Sound With IM4:IM4 is created for listeners who want to hear more than just music. This open-back in-ear monitor allows every detail to breathe, delivering a spacious and natural presentation. The 10 mm dynamic driver with PU diaphragm and beryllium coating produces deep, controlled bass, smooth mids, and crisp, airy highs. The dual-cavity structure combined with a powerful N52 dual-magnet system ensures excellent control, fast transient response, and engaging dynamics across the entire frequency range.The nine-port front chamber is engineered to balance frequencies with precision, while the damped rear chamber minimizes standing waves and distortion. The result is a wide soundstage with impressive separation and a relaxed tuning that supports long listening sessions without fatigue. With a sensitivity of 109 dB and an impedance of 21 Ohm, this HiFi earphone pairs easily with smartphones, DACs, and portable audio players. Flexible Tuning And Premium Comfort:IM4 gives you the freedom to shape your sound. The included aluminum and brass nozzles allow you to adjust the sound signature to your preference. Aluminum reduces sibilance and adds warmth to the low end, while brass enhances midrange presence and treble clarity. Three types of ear tips, balanced, bass, and deep bass, are included in small, medium, and large sizes for precise fit and acoustic optimization.The housing is CNC-machined from 6063 aluminum and finished with a sandblasted, anodized surface that feels smooth and refined. Its ergonomic shape is designed for a secure and natural fit, while the lightweight construction at just 7 g per earbud, 38 g including cable, ensures pressure-free comfort throughout the day. The detachable 2-pin 0.78 mm cable features a 4-core, 392-strand 5N silver-plated OFC copper design with a 3.5 mm plug, offering durability and upgrade flexibility for evolving audio setups. This is more than just another IEM. It is a carefully crafted step into the HiFi world, where sound quality, customization, and comfort come together seamlessly. Specifications:• Driver: 10 mm N52 Dual-Magnet Dual-Cavity Dynamic Driver• Diaphragm: PU Beryllium-Coated • Design: Open-Back, Dual-Chamber Acoustic Structure • Sensitivity: 109 dB/mW • Impedance: 21 Ohm • Frequency Response: 20 Hz To 20 kHz • Cable: 4-Core 392-Strand 5N Silver-Plated OFC Copper • Connector: 2-Pin 0.78 mm • Audio Jack: 3.5 mm Gold-Plated • Material: 6063 CNC Aluminum • Weight Per Earbud: 7 g ±0.5 g • Weight Including Cable: 38 g ±1 g • Colors: Black Or Silver
Brand description - Fosi Audio
Manuals and user guides for Fosi Audio productsUnfortunately, as manufacturers do not make manuals or guides in all languages, we cannot guarantee that a local language manual is included for the item. 
   ALL PRICES ARE INCL. 25% DANISH VAT/TAXAV-Connection A/S • VAT no.: DK27907547 • Kaervej 71-73 • 6400 Soenderborg • Denmark • Tel. +45 7442 1078 • E-mail: [email protected] © Copyright AV-Connection A/S. All images and texts on the website are copyrighted and any copying without specific permission is prohibited. Copying and photographing of the website with sales in mind is prohibited under sections 1 and 2 of the Copyright Act. Parties who do not comply with this will be required to pay compensation and be prosecuted in accordance with section 38.
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HIFI STEREO
