Fosi Audio i5
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Fosi Audio i5
The Fosi Audio i5 are open-back over-ear magnetoplate headphones in a black and brown colour scheme designed for discerning listeners looking for studio-quality sound and realistic spatial presentation. With an open design and large 97mm transducer, they offer an exceptionally wide soundstage, precise instrument localization and natural detail. The combination of a nano-thin diaphragm and strong neodymium magnets ensures low distortion and high dynamics even at higher volumes. The Fosi Audio i5 headphones are designed with comfort in mind, even for long listening sessions. The ergonomic memory steel head bridge, multi-axis swivel earcups and breathable protein leather earcups reduce pressure on the head and ears. A detachable cable allows for easy replacement or upgrade, and compatibility with both 3.5mm and 6.3mm connectors ensures universal connection to home and studio setups.
Open
Construction
3.5 mm / 6.3 mm
Connection type
Without microphone
Microphone design
10-50 000 Hz
Frequency range
Key features of the Fosi Audio i5 headphones
- Magnetoplanar transducer with ultra-thin 97mm diaphragm
- Open design for a wide and airy soundstage
- The Fosi Audio i5 headphones offer a frequency range of 10 - 50,000 Hz
- Sensitivity 98 dB/mW at 1 kHz
- Impedance 28 Ohm suitable for amplifiers and powerful players
- Low THD < 1% at 100 dB SPL
- Detachable 1.6 m cable with 3.5 mm connector and 6.3 mm adapter
- Swivel clamshells with multi-axis joint for a better fit
- Construction of walnut wood and CNC aluminium frame
- Comfortable protein leather ear cups and memory head bridge
Studio sound with magnetoplanar technology
The Fosi Audio i5 headphones use a magnetoplanar transducer with a nano-membrane approximately 2 μm thick to ensure fast response and accurate reproduction of details. Stable magnetic field and sharp transients are ensured by 44 N50 neodymium class magnets. The open back grille minimizes resonances and promotes a natural, holographic spatial effect. The sound is clean, balanced and realistic without exaggerated colouration. With a high maximum sound pressure ≥ 120 dB SPL, they can handle even dynamically demanding songs.
Comfort and ergonomics for long listening sessions
The memory steel in the head bridge allows adaptation to different head shapes. The multi-axis swivel earcups automatically adjust to the position of the ears for even pressure distribution. Breathable protein leather earcups ensure comfort even when listening for hours. Silicone sliders allow fine-tuning of size. The overall construction is designed to minimize fatigue during prolonged use.
Precision workmanship and quality materials
The walnut wood chambers give the headphones not only a premium look but also acoustic stability. CNC machined aluminium frame increases the strength and durability of the structure. Genuine leather on the headstock contributes to a luxurious feel and durability. The removable cable allows easy replacement or use of an alternative symmetrical connection. The combination of quality materials and precision craftsmanship underlines the audiophile character of the i5.
Technical specifications
- Inverters: 97 mm magnetoplanar
- Inverter type: Planar Magnetic Transducer
- Design: open design over the ears
- Frequency range: 10 - 50 000 Hz
- Sensitivity: 98 dB/mW @1 kHz
- Impedance: 28 Ohm
- THD: < 1% at 100 dB SPL
- Maximum SPL: ≥ 120 dB SPL
- Recommended amplifier power: ≥ 500 mW
- Connector: 3.5 mm Jack + 6.3 mm adapter
- Cable: removable, length 1.6 m
- Construction: walnut wood + aluminium
- Weight: approx. 165 g
Package contents
- Fosi Audio i5 headphones
- 3.5 mm cable
- 6.3 mm adapter
- User manual
Impedance
This indicates how power-hungry the headphones are. Headphones with lower impedance (e.g. 32 Ω) are ideal for mobile phones and laptops. Higher impedance (e.g. 80 Ω and above) is more suitable for Hi-Fi players and amplifiers. Frequency range
Indicates what sounds the headphones can play. The normal range is 20 Hz - 20 kHz, which corresponds to what the human ear hears. Lower Hz = deeper bass, higher kHz = more detailed treble.Specifications
Type of headphones
Connection
Headphone characteristics
Microphone characteristics
Colour
Weight
Backlight
Number of headphones
Perfect Sound Group s. r. o. | Čerčanská 640/30 | 140 00 | Praha 4 Krč | [email protected] | +420 722 702 122
Specifications can be changed without notice. Images are for illustrative purposes only.
