Fosi Audio i5 Open-Back Planar Magnetic Headphones

Fosi Audio i5

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Open-Back Planar Magnetic Headphones 
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Gaming HiFi DAC/Headphone Amplifier
Gaming DAC Headphone Amplifier

Fosi Audio i5

Hi-Res

Gaming HiFi DAC/Headphone Amplifier

Open-Back Planar Magnetic Headphones

An Enduring Luxurious Listening Experience
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2.1W+2.1W

High Power Output

0.0002%

Ultra-Low Distortion

PCM 384kHz, DSD256

High Sampling Rates

2.1W+2.1W 

High Power Output 

0.0002% 

Ultra-Low Distortion 

PCM 384kHz, DSD256 

High Sampling Rate  

i5 Deposit Campaign for Benefit Reservation

i5 Deposit Campaign 
for Benefit Reservation

Secure your early access to the i5 with a $9.99 deposit and receive limited bonuses
Fosi Audio i5 Deposit Campaign

Limited Deposit bonus includes：

1. 4.4mm Upgraded Cable ×1
2. 4.4mm to XLR Adapter ×1
3. Extra Pair of Earpads ×1
4. 35% OFF Kickstarter Secret Reward

Make Your Deposit

Secret rewards are limited and time-sensitive! To make sure you don’t miss out, be sure to:

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Join our exclusive Discord group to discuss with i5 supporters

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Make Your Deposit

Secret rewards are limited and time-sensitive! To make sure you don’t miss out, be sure to:

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Fosi Audio i5

The i5 was born from our mission to make planar magnetic headphones more accessible—without compromising on sound quality, comfort, or design. Over a year of in-house development and acoustic tuning led to a headphone that delivers exceptional clarity, low distortion, and lifelike detail.

Immersive Listening
Pure Original Sound 

Crafted with an ultra-thin diaphragm using nano-level technology, an invisible high-powered magnetic system, and precision acoustic design, the i5 delivers high resolution and low distortion for a truly lifelike listening experience. 
Planar Headphones
Fosi Audio i5 Planar Headphones

  • Ultra-Large Diaphragm

  • Sputtered Coating 

  • Magnetic Matrix

  • Acoustic Mesh

Ultra-Large Diaphragm

97mm Ultra-Large Diaphragm

The ultra-thin diaphragm, crafted with nano-level precision, delivers faster response, enhanced detail, and a more natural, clear, and layered sound. 

Sputtered Coating 

Sputtered Coating Technology

Utilizing advanced targeted sputtering technology, a highly conductive silver metal voice coil as thin as 1.3μm is precisely coated onto the diaphragm. This process significantly enhances sound refinement while ensuring durability, keeping excellent audio performance consistently stable over time. 

Magnetic Matrix

Symmetrically Arranged High-Strength Magnetic Matrix 

Each driver unit features 22 pieces of N50-grade neodymium magnets arranged symmetrically, ensuring precise and stable diaphragm vibration. This design enables accurate and swift dynamic response, effectively reducing nonlinear distortion to produce purer, more natural sound, faithfully reproducing the essence of music. 

Acoustic Mesh

Rigid High-Transparency Acoustic Mesh

The high-transparency rigid rear mesh structure provides stable air pressure damping and linear feedback. It smooths out frequency spikes and reduces nonlinearity, achieving an open, airy soundstage with ultra-low acoustic resistance. 

Ergonomic Design 
Long-Lasting Comfort 

Designed to follow the natural contours of the head, the i5 ensures a secure yet gentle fit. Even during extended listening sessions, it remains comfortable and pressure-free, letting you enjoy your music without distraction. 
What is a planar headphone

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Dual-Axis Ear Cup Arms 
Title

Allows seamless vertical and horizontal rotation for a custom fit to different head shapes, enhancing both comfort and stability. 
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Stepless Silicone Adjustment 
Title

The headband features a silicone adjustment slider with a damped, smooth feel, enabling easy and precise positioning based on personal preference. 

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Durable Memory Metal Headband 
Title

Made of high-strength memory metal, the headband maintains its shape over time. Lightweight and flexible, it reduces pressure and enhances comfort. 
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Dual-Axis Ear Cup Arms
Title

Allows seamless vertical and horizontal rotation for a custom fit to different head shapes, enhancing both comfort and stability. 

Stepless Silicone Adjustment 
Title
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Your heading text goes here
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Breathable Skin-Friendly Earpads 
Title

Crafted with perforated leather and breathable fabric, the earpads stay cool and soft. Memory foam inside ensures all-day comfort without overheating. 

The headband features a silicone adjustment slider with a damped, smooth feel, enabling easy and precise positioning based on personal preference. 

Durable Memory Metal Headband 
Title

Made of high-strength memory metal, the headband maintains its shape over time. Lightweight and flexible, it reduces pressure and enhances comfort. 

Breathable, Skin-Friendly Earpads 
Title

Crafted with perforated leather and breathable fabric, the earpads stay cool and soft. Memory foam inside ensures all-day comfort without overheating. 

Refined Craftsmanship 
Where Aesthetics Meet Quality 

A refined fusion of premium materials and elegant design, delivering a look that exudes sophistication, texture, and distinctive character. 
Are Planar headphones better?
High End Planar Magnetic Headphones

Genuine Suede Leather Headband 

Soft and refined for a more comfortable fit.
Title

Luxurious Walnut Wood Frame 

Each pair features a unique natural grain.
Title
High End Planar Magnetic Headphones

CNC-Machined Aluminum Frame

Lightweight yet sturdy with a metallic finish
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High End Planar Magnetic Headphones

S-Shaped Decorative Accent 

Elegant and flowing, inspired by musical notes
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Fosi Audio i5 features

Detachable Cable Design 
Title

The i5 features a detachable cable design with standard 3.5mm connectors on both sides, and is compatible with our available 3.5mm and 4.4mm headphone cables.

What's in the Box