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Fosi Audio 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

4.5 (16) Write Review
Free shipping on orders over $29.99

$79.99

$ 32 .99 $32.99

In Stock
  • 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


Product Description

Fosi Audio P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier

Authentic Tube Amplification

Fosi Audio P3 Tube Preamplifier/Headphone Amp

Experience the unique charm from vacuum tubes.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

Embark on a Warm & Rich Musical Journey


The essence of tube amplification, experiencing the perfect harmony of technology and nature.

  • 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)
Fosi Audio P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier

Key Parameters

  • Signal-to-Noise Ratio≥103dB
  • Noise Floor: 64uV
  • Crosstalk: 95dB
Fosi Audio P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier

Mode Indicator

  • RCA mode: steady red light
  • Bluetooth pairing mode: blue light flashing
  • Bluetooth connection built: steady blue light
Fosi Audio P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier

Bluetooth Connectivity

  • Bluetooth Range: ≥10m
  • Bluetooth Version: 5.1
  • Bluetooth Name: Fosi Audio P3
Fosi Audio P3 Tube Preamp Headphone Amplifier Home Audio Preamplifier

Bluetooth Reset

Press and hold for 3 seconds to clear Bluetooth pairing to solve the problem of Bluetooth being mistakenly connected by others.

P3

Comparison Chart

Headphone Amp+Preamp

Type

Headphone Amp+Preamp

-

MAX Power Output

-

Bluetooth + RCA

Input

AUX + RCA

RCA+Headphone+AUX

Output

3.5 mm + 6.35 mm

Treble& Bass Control

≤ 0.02%

THD

≤0.03%

≥103dB

SNR

≥ 95dB

Headphone Amp+Preamp

Type

Phono Preamp

-

MAX Power Output

-

Bluetooth + RCA

Input

RCA

RCA+Headphone+AUX

Output

RCA + Headphone

Treble& Bass Control

≤ 0.02%

THD

≤ 0.08%

≥103dB

SNR

≥ 70dB

Headphone Amp+Preamp

Type

Phono Preamp

-

MAX Power Output

-

Bluetooth + RCA

Input

Bluetooth+ AUX+ RCA

RCA+Headphone+AUX

Output

RCA

Treble& Bass Control

≤ 0.02%

THD

≤ 0.1%

≥103dB

SNR

≥ 70dB

Headphone Amp+Preamp

Type

Phono Preamp

-

MAX Power Output

-

Bluetooth + RCA

Input

RCA+3.5mm AUX

RCA+Headphone+AUX

Output

RCA+3.5mm AUX

Treble& Bass Control

≤ 0.02%

THD

≤0.1%

≥103dB

SNR

≥70dB


Gary
September 1, 2025
I bought an Audio-Technica record player a while ago along with some powered speakers, but they weren't providing the sound I was looking for. Even though the AT turntable has a preamp, it just wasn't delivering the full sound I wanted. I kept seeing recommendations for preamps, so I took a chance with this one. I am so glad I did!!This preamp made a huge difference in adding the bass and punch my system needed! How much of a change did this make? I'll put it into perspective. Imagine having a lamp with a 25-watt bulb and then you switch the bulb out with a 75-watt bulb. You end up with a much brighter and better light that makes everything brighter and easier to see. Now, back to the preamp, adding this made the music brighter, and fuller and increased the bass!!That alone is amazing, but this preamp also has a headphone jack and Bluetooth! I can play music from the turntable or my phone or iPad through it and it sounds incredible! I was considering adding a subwoofer before I bought this preamp, now I'm wondering if I even need one since this added the low-end sound my system was lacking. Yes, it improves the sound that much...well, to me anyway.The small tubes that it comes with are not installed when you get the preamp, so you have to install them yourself and it can be a little bit of a challenge to line up all the prongs, but it's worth it. One of the tubes went in fairly easily and the other tube took a little while to get all the prongs lined up to fit in the holes, but I'm very happy with this purchase.If you're looking for an affordable tube style preamp, give this one a try!
Customer
August 26, 2025
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.
Gary
August 22, 2025
I bought an Audio-Technica record player a while ago along with some powered speakers, but they weren't providing the sound I was looking for. Even though the AT turntable has a preamp, it just wasn't delivering the full sound I wanted. I kept seeing recommendations for preamps, so I took a chance with this one. I am so glad I did!!This preamp made a huge difference in adding the bass and punch my system needed! How much of a change did this make? I'll put it into perspective. Imagine having a lamp with a 25-watt bulb and then you switch the bulb out with a 75-watt bulb. You end up with a much brighter and better light that makes everything brighter and easier to see. Now, back to the preamp, adding this made the music brighter, and fuller and increased the bass!!That alone is amazing, but this preamp also has a headphone jack and Bluetooth! I can play music from the turntable or my phone or iPad through it and it sounds incredible! I was considering adding a subwoofer before I bought this preamp, now I'm wondering if I even need one since this added the low-end sound my system was lacking. Yes, it improves the sound that much...well, to me anyway.The small tubes that it comes with are not installed when you get the preamp, so you have to install them yourself and it can be a little bit of a challenge to line up all the prongs, but it's worth it. One of the tubes went in fairly easily and the other tube took a little while to get all the prongs lined up to fit in the holes, but I'm very happy with this purchase.If you're looking for an affordable tube style preamp, give this one a try!
Customer
August 17, 2025
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.
Staci K
August 15, 2025
The media could not be loaded.
カスタマー
August 7, 2025
この商品は、インテリアとても良いと思います。まず真空管部分ですが、通常はオレンジ色の電球色のみですが、青混じりで光ます。音に関しても充分な出力があり絞って使用しています。間に改造修理したイコライザーをかませていますが相性バッチリでした。DACからイコライザーに繋ぎイコライザーから二つのアンプに分岐して電源Switch切り替えでヘッドホンとスピーカーの切り替えをしています。スピーカーの音とヘッドホンの音が近い音質で聞こえるので違和感なくかなり良いです！！pcの純正ジャックに繋ぐと同じイコライザー繋いでいない為音が違うのは当たり前ですが、やっぱり耳に突き刺さりました。それぞれ個人独特の環境作るのに役立つと思います。
OÄŸuzhan Avran
August 5, 2025
Basslara ve tizlere etkisi inanılmaz.
joqueval
June 11, 2025
The media could not be loaded.
Christopher
May 20, 2025
Absolutely fantastic headphone amplifier.You get completely free control of the sound profile you want.The customer support is also absolutely fantastic and will help you with absolutely anything you need.Very very highly recommended!
Mr James Farrant
May 14, 2025
good bluetooth connectivity and mediocre sound processing ... I use mine in line with the X2 preamp for my turntable. Well built
Staci K
May 2, 2025
The media could not be loaded.
カスタマー
April 16, 2025
この商品は、インテリアとても良いと思います。まず真空管部分ですが、通常はオレンジ色の電球色のみですが、青混じりで光ます。音に関しても充分な出力があり絞って使用しています。間に改造修理したイコライザーをかませていますが相性バッチリでした。DACからイコライザーに繋ぎイコライザーから二つのアンプに分岐して電源Switch切り替えでヘッドホンとスピーカーの切り替えをしています。スピーカーの音とヘッドホンの音が近い音質で聞こえるので違和感なくかなり良いです！！pcの純正ジャックに繋ぐと同じイコライザー繋いでいない為音が違うのは当たり前ですが、やっぱり耳に突き刺さりました。それぞれ個人独特の環境作るのに役立つと思います。
OÄŸuzhan Avran
April 14, 2025
Basslara ve tizlere etkisi inanılmaz.
joqueval
February 22, 2025
The media could not be loaded.
Christopher
February 4, 2025
Absolutely fantastic headphone amplifier.You get completely free control of the sound profile you want.The customer support is also absolutely fantastic and will help you with absolutely anything you need.Very very highly recommended!
Mr James Farrant
January 30, 2025
good bluetooth connectivity and mediocre sound processing ... I use mine in line with the X2 preamp for my turntable. Well built