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Overview

The Fosi Audio IM4 in-ear monitor headphones are engineered for audiophiles and musicians seeking high-fidelity detail, delivering powerful bass and transparent highs with a five-driver hybrid design. Enjoy professional-grade clarity and comfort, whether on stage or commuting.
  • In-ear monitors ideal for music lovers and performers
  • Five-driver hybrid system for detailed, balanced sound
This description was generated by AI and reviewed for accuracy.

Fosi Audio IM4 Open-Back HiFi In-Ear Monitor Headphones with 10mm Beryllium Drivers

Model: Fosi Audio
Web Code: 19723137
Sold and shipped by | 4.5 seller rating (554 reviews)

Sale ends: *

Colour: Galaxy Silver

Colour Obsidian Gray
Colour Obsidian Gray

Obsidian Gray

Colour Galaxy Silver
Colour Galaxy Silver

Galaxy Silver

Available for deliveryAvailable online only

Delivery times vary by location. Most Marketplace items leave sellers' locations within 2 business days. Allow additional time for shipping.

Seller Return Policy

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Warranty

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

What you need to know
  • In-ear monitors crafted for audiophiles and musicians
  • Features a 10mm dynamic driver plus four balanced armature drivers for rich, precise sound
  • Ergonomic resin shell fits comfortably and offers up to 26dB passive noise isolation
  • Detachable 0.78mm 2-pin silver-plated copper cable allows easy upgrades and replacements
Audio Performance & Sound Quality
  • Five-driver hybrid configuration combines a 10mm dynamic driver and four balanced armature drivers for full-spectrum sound
  • Precise electronic crossover creates a smooth, coherent transition across frequencies
  • Professional tuning optimized for accurate monitoring and detailed listening
  • High-resolution audio certified for playback from 20Hz to 40kHz
Fit, Comfort & Design
  • Medical grade, skin-friendly resin shell contours to the ear for lasting comfort
  • Secure, ergonomic design naturally minimizes external noise for focused listening
  • Lightweight construction at approximately 5.5g per earbud supports long wear
Connectivity & Smart Features
  • Detachable 2-pin 0.78mm connector supports upgraded or replacement cables
  • Includes a 1.2m silver-plated oxygen-free copper cable for durable signal quality
  • 3.5mm gold-plated stereo jack for broad device compatibility
Included Accessories
  • Comes with multiple silicone ear tips and a rugged storage case for custom fit and protection
This description was generated by AI and reviewed for accuracy.

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

Shipping Charges

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Processing Time

Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.

Shipping Area Restrictions

Shipping is not available in the following areas*:
  • No restrictions in Canada
*Please note: Shipping area restrictions may vary for large items. If an item can't be shipped to your address, we'll let you know during the checkout process.
Product Category
Headphones, earphones, and ear buds (of any kind including AirPods)
Return/Exchange Period
30 days
Condition
Unopened, No signs of use

Due to hygiene concerns, this product cannot be returned if opened

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