FosiAudio
Fosi Audio P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier Mini Vacuum
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Highlights
- True Tube Amplification: The preamp circuit elevates the voltage to 54V, ensuring the tubes work to their full potential, delivering a warm and rich experience. The unique preamplification technology delivers pure audio signals, faithfully reproducing crisp high tones, full midrange richness, and deep, rhythmic bass. Important Tips: Remove the copper rings for effortless installation of the tubes on the P3
- Bluetooth 5.1: Equipped with the Qualcomm QCC3031 chip, the P3 preamp guarantees impressive wireless sound quality and low latency, with compatibility for aptX HD and aptX LL codecs formats. Furthermore, the inclusion of a manual reset button prevents accidental connections by others, enhancing connection reliability
- Versatile Connectivities: The P3 provides Bluetooth/RCA inputs and RCA/AUX OUT/3.5mm headphone outputs. It can help create a 2.1-channel audio system by connecting active speakers/an amplifier and a subwoofer. As a headphone amplifier, it supports headphones with impedance ranging from 16Ω to 300Ω
- Premium Components: It utilizes ELNA audiophile-grade capacitors and taper A pot. The bass and treble controls boast central detents for tone-defeating. With an SNR of up to 103dB and a crosstalk of 95dB, it helps form a HiFi audio system when paired with the V3 amplifier of the same series
- What You'll Get: Fosi Audio P3 Tube Preamplifier x1, User Manual x1, Vacuum Tube x2, 12V/1.5A Power Supply x1
Why You'll Love It
- Dedicated 54V circuit powers two vacuum tubes to add warmth to your audio
- Qualcomm Bluetooth 5.1 supports aptX HD and aptX LL for wireless listening
- Drives wired headphones ranging from 16 to 300 ohms impedance
- Integrates into 2.1-channel systems with active speakers, amplifiers, and subwoofers
- Manual Bluetooth reset button stops unwanted guest connections
Pros
- +Supports aptX HD and low-latency Bluetooth
- +Center detents on tone controls for flat response
- +Includes two vacuum tubes and power supply
- +Wide 16-300 ohm headphone compatibility
Cons
- -Requires manual removal of copper rings during tube setup
- -No built-in digital optical or USB inputs listed
Detailed Review
The Fosi Audio P3 is a compact vacuum tube preamplifier and dedicated headphone amplifier designed to sit between your audio sources and powered gear. It suits desktop listeners and home audio enthusiasts who want to integrate warm tube sound and wireless convenience into a speaker or headphone setup.
At the heart of the unit is a preamplification circuit that steps up internal voltage to 54V, driving the two included vacuum tubes to handle crisp highs, rich midranges, and deep bass. Wireless streaming runs on a Qualcomm QCC3031 chip featuring Bluetooth 5.1, bringing compatibility with aptX HD and aptX LL codecs. A dedicated manual reset button lets you clear previous pairings, preventing unwanted devices from hijacking your connection.
Connecting the P3 to a broader sound system is straightforward thanks to versatile analog options. You can route audio via Bluetooth or wired RCA inputs, then send the signal out through RCA, AUX OUT, or the 3.5mm headphone jack. This flexibility allows you to build a 2.1-channel speaker arrangement with a powered amplifier and subwoofer, or directly drive headphones rated from 16 to 300 ohms. Tone adjustments are managed by bass and treble knobs fitted with central detents, backed by internal ELNA capacitors.
When it comes to setup trade-offs, getting the tubes into their sockets requires removing the pre-fitted copper rings first. In terms of connectivity, the unit relies strictly on Bluetooth and analog RCA inputs, meaning users looking for optical, coaxial, or direct USB DAC inputs will need separate converters.
Verdict: The Fosi Audio P3 is a well-equipped preamplifier for listeners who want genuine tube character and high-resolution Bluetooth in one desktop-friendly unit. It is an excellent choice for powering high-impedance headphones or shaping the sound of a compact 2.1 speaker setup.
Specifications
- Circuit Voltage: 54V
- Wireless Chipset: Qualcomm QCC3031 (Bluetooth 5.1)
- Bluetooth Codecs: aptX HD, aptX LL
- Signal-to-Noise Ratio (SNR): Up to 103dB
- Crosstalk: 95dB
- Headphone Impedance Compatibility: 16Ω to 300Ω
- Power Supply: 12V/1.5A
- Inputs: Bluetooth, RCA
- Outputs: RCA, AUX OUT, 3.5mm Headphone Jack
Who Should Buy It
A great fit if you:
- Want to introduce tube preamplification into an existing speaker or V3 amplifier setup.
- Stream audio wirelessly from your phone using aptX HD or low-latency aptX LL.
- Need a desktop headphone amplifier capable of driving 16 to 300 ohm headphones.
- Plan to route audio to a 2.1-channel system with an active subwoofer.
Consider something else if you:
- Require native digital connections like optical, coaxial, or USB audio inputs.
- Prefer an all-solid-state setup without physical vacuum tubes to install.
FAQ
What comes inside the box?
The package includes the Fosi Audio P3 preamplifier, two vacuum tubes, a 12V/1.5A power supply, and a user manual.
What kind of headphones can I plug into the P3?
The 3.5mm headphone output supports headphones with an impedance rating between 16Ω and 300Ω.
How do I install the vacuum tubes properly?
You need to remove the copper rings from the sockets first to allow smooth, effortless installation of the tubes.
What wireless codecs does the Bluetooth connection support?
Powered by the Qualcomm QCC3031 Bluetooth 5.1 chip, the P3 supports aptX HD and aptX LL codecs.
Product Details
| Brand | FosiAudio |
| ASIN | B0CJBKWF43 |
