---
product_id: 576801869
title: "P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier Mini Vacuum Pre Amp Receiver with Bluetooth aptX LL HD Bass Treble Tone Controls for HiFi Stereo Active Speakers with RCA AUX Jack"
brand: "fosi audio"
price: "4917929₫"
currency: VND
in_stock: true
reviews_count: 13
category: "Fosi Audio"
url: https://www.desertcart.vn/products/576801869-p3-tube-preamp-headphone-amplifier-home-audio-preamplifier-mini-vacuum
store_origin: VN
region: Vietnam
---

# Bluetooth 5.1 aptX HD/LL low latency 54V tube voltage for rich sound Bass & treble tone controls with detents P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier Mini Vacuum Pre Amp Receiver with Bluetooth aptX LL HD Bass Treble Tone Controls for HiFi Stereo Active Speakers with RCA AUX Jack

**Brand:** fosi audio
**Price:** 4917929₫
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your audio game with vintage tube warmth and modern wireless freedom!

## Quick Answers

- **What is this?** P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier Mini Vacuum Pre Amp Receiver with Bluetooth aptX LL HD Bass Treble Tone Controls for HiFi Stereo Active Speakers with RCA AUX Jack by fosi audio
- **How much does it cost?** 4917929₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/576801869-p3-tube-preamp-headphone-amplifier-home-audio-preamplifier-mini-vacuum)

## Best For

- fosi audio enthusiasts

## Why This Product

- Trusted fosi audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Tone Control:** Fine-tune your sound with premium ELNA capacitors and tactile bass & treble controls featuring central detents for perfect EQ.
- • **Versatile Connectivity:** Easily switch between RCA, AUX, and headphone outputs supporting 16Ω–300Ω headphones and 2.1-channel setups.
- • **Warm Tube Amplification:** Experience authentic, rich analog warmth with a powerful 54V tube preamp circuit that elevates every note.
- • **Audiophile-Grade Clarity:** High SNR (103dB) and low crosstalk (95dB) deliver pristine stereo separation and immersive soundstage for true HiFi lovers.
- • **Seamless Wireless Streaming:** Bluetooth 5.1 with Qualcomm QCC3031 chip ensures crystal-clear, low-latency audio with aptX HD and aptX LL codecs.

## Overview

The Fosi Audio P3 is a compact tube preamplifier and headphone amplifier combining classic vacuum tube warmth with modern Bluetooth 5.1 aptX HD/LL wireless streaming. It delivers rich, detailed sound with 54V tube voltage, versatile RCA/AUX connectivity, and precise bass/treble tone controls. Designed for audiophiles and music lovers, it supports headphones from 16Ω to 300Ω and offers high signal-to-noise ratio and low crosstalk for a premium HiFi experience.

## Description

Product description Fosi Audio P3 Tube Preamplifier/Headphone Amp Experience the unique charm from vacuum tubes. Embark on a Warm & Rich Musical Journey RMS Power: 250mw @16Ω; 150mw @32Ω; 32mw @250Ω; 20mW @300Ω Headphone Impedance: 16-300Ω; SNR: ≥103dB; THD: ≤ 0.02% Input: Bluetooth 5.1/RCA; Output: RCA/AUX/3.5mm headphone jack Dynamic Range: 104dB; Frequency Response: 20Hz-20kHz(±1dB) Compatible with DC 12V/1.5A~3A power supply Please ensure that your turntable has a built-in preamp to ensure compatibility with the P3 preamp. Audiophile-Grade Capacitors Built-in quality Japanese ELNA caps for outstanding performance. Qualcomm aptX Bluetooth QCC3031 Chip Supports multiple codecs formats: SBC/AAC/aptX/aptX HD/aptX LL. Logarithmic Potentiometer Helps to achieve a fine volume tuning to match human ear's auditory characteristics. Effortless Insertion & Removal Suitable for 7-pin vacuum tubes. Please align each pinhole before installation. DIY Your Stereo System Applicable Vacuum Tube Model: 6K4/6J1/6J4/GE5654/6AK5, etc. vacuum tubes. Vacuum Tubes The Synthesis of Tech and Nature Embracing technology, staying close to nature, and maintaining global climate awareness. Exquisite Craftsmanship Utilizing CNC integrated molding, precise sandblasting, and meticulous detailing. Key Parameters Signal-to-Noise Ratio≥103dB Noise Floor: 64uV Crosstalk: 95dB Mode Indicator RCA mode: steady red light Bluetooth pairing mode: blue light flashing Bluetooth connection built: steady blue light Bluetooth Connectivity Bluetooth Range: ≥10m Bluetooth Version: 5.1 Bluetooth Name: Fosi Audio P3 Bluetooth Reset Press and hold for 3 seconds to clear Bluetooth pairing to solve the problem of Bluetooth being mistakenly connected by others. Friendly Solutions Guide I. Compatibility Limitations 1. Connections: To connect passive speakers/subwoofers, first connect to a power amplifier via the RCA output; To connect active speakers/subwoofers, via the AUX output; To connect headphones, via the 3.5mm headphone jack output. 2. Bluetooth Support: SBC/AAC/aptX/aptX HD/aptX LL; Does not support LDAC or Dolby Atmos. P3 can only receive Bluetooth signals and does not transmit them. Therefore, it cannot connect to Bluetooth headphones/TV wirelessly. Instead, need to plug headphones into the headphone out port/RCA port. II. Function - Related Solutions 1. Cable Issues: Ensure all plugs (e.g., RCA input, RCA output, AUX output) are fully inserted and match the device specifications. Reseat any loose connections. Ensure all cables are correctly connected, secure, and in good condition. 2. Tube Installation: Make sure the tube pins are properly lined up with the tube socket; Please manually straighten the pins if the pin is deformed.

Review: Great little preamp, it's worth it. - This made a huge difference in sound for me. Paired with my sound card on my computer and a set of Sony MDR-7506 headphones this makes a formidable combo. I also really like the fact that I can swap between pc audio and bluetooth with a switch and listen to just about anything.
Review: A Musician's or Music Fans Dream! - Pros: I have been a musician and music fan for my entire life. I have a substantially large music collection of many different genres. I’m one of those people who listens to the entire album with headphones or sitting in the center between two speakers, reading along with the lyric sheet. Sound quality and production are very important to me. I prefer studio recordings vs. live recording for that reason alone. Lets just say I’m a wanna’ be audiophile. When I received my Fosi P3 it changed the entire listening experience for me. I don’t know if it’s the tubes and the chips that give the music a spacial and more separated, clearer stereo sound. But whatever it is, Fosi got it right! I’m using it as a pre amp for my old Sony receiver which I never really was happy with the sound of, and now the Fosi P3 has improved the sound 100%. The clarity and spacial separation of hearing each instrument individually and and every little nuance in the production of a recording is truly brilliant and amazing. I run the Fosi’s output to the input of a channel on the Sony with bass & treble on the Sony in the flat position. So I only use the amp part of the Sony for power. I have the volume of the Sony at the two o’clock position. I use the Fosi’s delicate and accurate volume, bass and treble controls only. If you move these controls ever so slightly you can hear a substantial difference in eq. The bluetooth is perfect and connects immediately to my iPhone with no drop outs, static or interference. I intend to have a Fosi in every room of my home. Features I would like to see in Fosi’s future are multiple inputs and a remote control. Did I mention how great headphones sound in the Fosi? A new and surprisingly wonderful experience altogether. Another cool feature is when you plug in headphones, it mutes the speakers. I myself love this feature. I could go on and on but I’ll just say, you will not find a better way of listening to music for under one hundred dollars. If you really love and listen to music like I do, buy the Fosi P3, You won’t be disappointed. Btw, I now have 3 of these little amps. The same one in all 3 separate rooms Cons: Only 1 Input. No Remote. The tubes are difficult to insert. Fosi support was outstanding and sent me a video of unscrewing the gold rings out before inserting the tubes by even just unscrewing the gold ring was very difficult to unscrew and screw back in. Then the tubes are even more difficult to insert. I followed Fosi's instructions but the tube pins are definitely crooked and don't line up perfectly with the holes. You have to keep bending the pins carefully to get them to all fit in and when you do finally get them to line up the tubes have to be pressed down so hard that you feel you might break them. I took me almost 30 minutes to get 1 tube in. After buying 3 of these preamps, the tube insertion did not getting any easier, I have to say Fosi need to address this issue. Update 1-26-26 : I own 3 of these units and have found the Headphone Jack in all three have the Left & Right reversed. So what should be in the right ear you should be hearing in the left ear.

## Features

- 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, 5654W Vacuum Tube x2, 12V/1.5A Power Supply x1

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CJBKWF43 |
| Amplifier Type | Tube |
| Audio Output Mode | Stereo, RCA, AUX, Headphone |
| Best Sellers Rank | #30,235 in Electronics ( See Top 100 in Electronics ) #23 in Audio Component Preamplifiers |
| Brand | Fosi Audio |
| Color | Black |
| Connector Type | RCA, 3.5mm Jack, AUX Out |
| Customer Reviews | 4.3 out of 5 stars 501 Reviews |
| Item Weight | 500 Grams |
| Manufacturer | Fosi Audio |
| Mfr Part Number | P3 |
| Model Name | P3 |
| Model Number | P3 |
| Output Channel Quantity | 3 |
| Output Wattage | 0.25 Watts |
| Power Source | AC |
| Unit Count | 1.0 Count |
| Warranty Description | 24 Month Manufacturer |

## Product Details

- **Brand:** Fosi Audio
- **Color:** Black
- **Item Weight:** 500 Grams
- **Output Channel Quantity:** 2
- **Power Source:** AC

## Images

![P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier Mini Vacuum Pre Amp Receiver with Bluetooth aptX LL HD Bass Treble Tone Controls for HiFi Stereo Active Speakers with RCA AUX Jack - Image 1](https://m.media-amazon.com/images/I/61XYoUopdEL.jpg)
![P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier Mini Vacuum Pre Amp Receiver with Bluetooth aptX LL HD Bass Treble Tone Controls for HiFi Stereo Active Speakers with RCA AUX Jack - Image 2](https://m.media-amazon.com/images/I/71rQq13qnJL.jpg)
![P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier Mini Vacuum Pre Amp Receiver with Bluetooth aptX LL HD Bass Treble Tone Controls for HiFi Stereo Active Speakers with RCA AUX Jack - Image 3](https://m.media-amazon.com/images/I/81Scfqn3kiL.jpg)
![P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier Mini Vacuum Pre Amp Receiver with Bluetooth aptX LL HD Bass Treble Tone Controls for HiFi Stereo Active Speakers with RCA AUX Jack - Image 4](https://m.media-amazon.com/images/I/71oJe1MX4RL.jpg)
![P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier Mini Vacuum Pre Amp Receiver with Bluetooth aptX LL HD Bass Treble Tone Controls for HiFi Stereo Active Speakers with RCA AUX Jack - Image 5](https://m.media-amazon.com/images/I/71IvWQUQRLL.jpg)

## Questions & Answers

**Q: I am unable to connect/align the vacuum tubes in the socket of the P3.**
A: Remove the copper rings for easier tube installation.

**Q: How to reset P3 Bluetooth？**
A: Resetting the P3's Bluetooth with the RST hole in the back.

**Q: Can the op-amps in P3 be replaced?**
A: No, they cannot be replaced.

**Q: P3 power supply compatibility**
A: P3 is compatible with DC 12V/1.5A~3A power supply.

**Q: Does P3 support LDAC?**
A: No, it does not support LDAC.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great little preamp, it's worth it.
*by J***J on February 26, 2026*

This made a huge difference in sound for me. Paired with my sound card on my computer and a set of Sony MDR-7506 headphones this makes a formidable combo. I also really like the fact that I can swap between pc audio and bluetooth with a switch and listen to just about anything.

### ⭐⭐⭐⭐⭐ A Musician's or Music Fans Dream!
*by D***O on December 5, 2023*

Pros: I have been a musician and music fan for my entire life. I have a substantially large music collection of many different genres. I’m one of those people who listens to the entire album with headphones or sitting in the center between two speakers, reading along with the lyric sheet. Sound quality and production are very important to me. I prefer studio recordings vs. live recording for that reason alone. Lets just say I’m a wanna’ be audiophile. When I received my Fosi P3 it changed the entire listening experience for me. I don’t know if it’s the tubes and the chips that give the music a spacial and more separated, clearer stereo sound. But whatever it is, Fosi got it right! I’m using it as a pre amp for my old Sony receiver which I never really was happy with the sound of, and now the Fosi P3 has improved the sound 100%. The clarity and spacial separation of hearing each instrument individually and and every little nuance in the production of a recording is truly brilliant and amazing. I run the Fosi’s output to the input of a channel on the Sony with bass & treble on the Sony in the flat position. So I only use the amp part of the Sony for power. I have the volume of the Sony at the two o’clock position. I use the Fosi’s delicate and accurate volume, bass and treble controls only. If you move these controls ever so slightly you can hear a substantial difference in eq. The bluetooth is perfect and connects immediately to my iPhone with no drop outs, static or interference. I intend to have a Fosi in every room of my home. Features I would like to see in Fosi’s future are multiple inputs and a remote control. Did I mention how great headphones sound in the Fosi? A new and surprisingly wonderful experience altogether. Another cool feature is when you plug in headphones, it mutes the speakers. I myself love this feature. I could go on and on but I’ll just say, you will not find a better way of listening to music for under one hundred dollars. If you really love and listen to music like I do, buy the Fosi P3, You won’t be disappointed. Btw, I now have 3 of these little amps. The same one in all 3 separate rooms Cons: Only 1 Input. No Remote. The tubes are difficult to insert. Fosi support was outstanding and sent me a video of unscrewing the gold rings out before inserting the tubes by even just unscrewing the gold ring was very difficult to unscrew and screw back in. Then the tubes are even more difficult to insert. I followed Fosi's instructions but the tube pins are definitely crooked and don't line up perfectly with the holes. You have to keep bending the pins carefully to get them to all fit in and when you do finally get them to line up the tubes have to be pressed down so hard that you feel you might break them. I took me almost 30 minutes to get 1 tube in. After buying 3 of these preamps, the tube insertion did not getting any easier, I have to say Fosi need to address this issue. Update 1-26-26 : I own 3 of these units and have found the Headphone Jack in all three have the Left & Right reversed. So what should be in the right ear you should be hearing in the left ear.

### ⭐⭐⭐⭐ best way to add system volume and tone controls.
*by A***R on December 21, 2024*

I love how simple this little pre-amp is. The unit boast decent specs too, with SNR above 103 db. The volume and tone control knobs are small, but even my big hands manage to use them OK. The tone controls are not linear, but are useful once you get used to using very small adjustments, and work very well and very silently. The main reason I was attracted to this particular unit was that it had BlueTooth 5.1, which is a big sonic improvement, now that I've heard it. Auto pairing can be a bit of a bother if you use your phone's bluetooth for other things. At this price this little Fosi Audio P3 is both a bargain and a sonic suprise, worth every penny.

## Frequently Bought Together

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-05-15*