Fosi Audio P3
True Tube Preamplifier
Experience the Unique Charm from Vacuum Tubes
Fosi Audio P3
True Tube Preamplifier
Experience the Unique Charm from Vacuum Tubes
Why Fosi Audio P3?
Immersive HiFi Atmosphere
After refinement and enhancement, the sound becomes more enchanting, immersing you in a world of high-quality music.
True Amplification
Crafting Unique Tones
The preamp circuit elevates the voltage to 54V, ensuring the tubes work to their full potential, delivering a warm and rich experience
JAN 5654W
Vacuum Tubes
Explore warm tones, heightened emotion, and expanded dynamics. Replace vacuum tubes for infinite tonal possibilities
Immersive HiFi Atmosphere
After refinement and enhancement, the sound becomes more enchanting, immersing you in a world of high-quality music.
True Amplification
Crafting Unique Tones
The preamp circuit elevates the voltage to 54V, ensuring the tubes work to their full potential, delivering a warm and rich experience
JAN 5654W
Vacuum Tubes
Explore warm tones, heightened emotion, and expanded dynamics. Replace vacuum tubes for infinite tonal possibilities
Rolling Vacuum Tubes
It allows you to effortlessly personalize sound with diverse tubes, imbuing every note with your individuality and style.

QCC3031 Bluetooth Chip
Audio transmission is enhanced to support various high-quality formats ensuring the ultimate enjoyment of pure and lossless music.
Ideal Partner to V3
In the same series and form factor, we've added bass, treble adjustment, and Bluetooth connectivity for exceptional sound quality.

Bass and Treble Controls
The knobs are user-friendly, easily allowing you to restore the original tone by returning them to the center position.
Bass and Treble Controls
The knobs are user-friendly, easily allowing you to restore the original tone by returning them to the center position.
Front Headphone Jack
Experience immediate convenience with plug-and-play for a more intuitive and efficient music experience, without the need to reach behind.


Taper A Potentiometer
It achieves a linear listening experience, by enabling precise volume control to match the human ear's auditory characteristics.
Quality ELNA Capacitors
These high-quality components deliver clear, natural-sounding music with precision, low distortion, and stability.

Taper A Potentiometer
It achieves a linear listening experience, by enabling precise volume control to match the human ear's auditory characteristics.

More Functions
Manual Mode Control

Flexible source switching, along with easy operation, provides a seamless music experience at your fingertips
One-Click Pairing Reset

Press and hold the RST button for 3s to manually clear Bluetooth pairing, preventing accidental connections by others.
High Separation and SNR

Contributing to reduced noise interference, they ensure a pure and transparent audio signal, further enhancing sound quality performance.
Manual Mode Control

Flexible source switching, along with easy operation, provides a seamless music experience at your fingertips
One-Click Pairing Reset

Press and hold the RST button for 5s to manually clear Bluetooth pairing, preventing accidental connections by others.
High Separation and SNR

Contributing to reduced noise interference, they ensure a pure and transparent audio signal, further enhancing sound quality performance.