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Fosi Audio P3: Tube preamplifier with BT and aptX HD/aptX LL codecs

Fosi Audio P3
Fosi Audio P3

The Fosi Audio P3 is a new tube preamp with a headphone amplifier that supports headphones up to 300 ohms. The model has a Bluetooth 5.1 receiver and supports a number of codecs, including aptX of various variations.

Fosi Audio P3


True Tube Amplification

The preamp circuit boosts voltage to 54V to ensure full tube operation for warm, rich sound. Unique preamp technology delivers clear audio, accurately reproducing crisp highs, rich mids and deep, rhythmic bass.

Bluetooth 5.1

Equipped with the Qualcomm QCC3031 chip, the P3 delivers impressive wireless audio quality and low latency, as well as compatibility with the latest aptX HD and aptX LL codecs. In addition, the presence of a manual reset button prevents unauthorized people from accidentally connecting, increasing the reliability of the connection.

Fosi Audio P3 rear


Versatile Connectivity

The P3 features Bluetooth/RCA inputs and RCA/AUX OUT/3.5mm headphone outputs. With it, you can create a 2.1-channel audio system by connecting active speakers/amplifier and subwoofer. As a headphone amplifier, it supports headphones with impedance ranging from 16 to 300 ohms.

Premium Components

The amplifier uses audiophile-grade ELNA capacitors and an A-cone potentiometer. The bass and treble controls are equipped with special limiters. With an SNR of up to 103dB and crosstalk of 95dB, it helps form a HiFi audio system when paired with the V3 amplifier of the same series.


Fosi Audio P3 tube preamp x1, user manual x1, vacuum tube 5654W x2, power supply 12V/1.5A x1, 24-month warranty and prompt customer service.

Features of Fosi Audio P3:

  • RMS Power: 250mW @16Ω; 150 mW @32Ω; 32mW @250Ω; 20mW @300Ω
  • Headphone impedance: 16-300Ω
  • Noise level: 64 µV
  • Inputs: Bluetooth, RCA
  • Outputs: RCA, 3.5mm headphone jack, AUX Out
  • Frequency response: 20 Hz – 20 kHz (±1 dB)
  • Dynamic range: 104 dB
  • THD: ≤ 0.02%
  • SNR: ≥103 dB
  • Crosstalk: 95 dB
  • Bluetooth chip: QCC3031
  • Bluetooth version: 5.1
  • Bluetooth range: ≥10m
  • Bluetooth codecs: SBC/AAC/aptX/aptX HD/aptX LL
  • DC power input: 12V/1.5A~3A.

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