Fosi Audio

Fosi Audio V3 300W X2 2.0 Channel Hi-Fi Stereo Amplifier


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600W of Pure Hi-Fi Precision

Introducing the Fosi Audio V3—a compact powerhouse engineered for the audiophile in you. With a robust 300W x2 power output, this mini HiFi class-D amplifier is designed to bring your music to life, ensuring a high-fidelity audio experience that fills the room. 

Audiophile-grade sound quality

At the heart of the V3 lies the Texas Instruments TPA3255 Class-D amplifier chip, celebrated for its power efficiency and minimal distortion. Coupled with high-end components like Sumida audio inductors and WIMA capacitors, the V3 delivers sound quality that satisfies even the most discerning ears, ensuring a virtually distortion-free music playback experience.

Precision volume control

Volume adjustment on the V3 is a nuanced affair, thanks to the built-in logarithmic Taper A Pot. This feature allows for finer volume adjustments, providing an audio experience that's both immersive and tailored to the human ear.

Customize your audio

The V3 amplifier invites you to make your mark on your music. With replaceable op-amp chips, you have the freedom to experiment with different sound signatures until you find the one that resonates with you, making the V3 as individual as your taste in music.

Cool under pressure

Heat is the enemy of performance. That's why the V3 features an innovative cooling system design. With vents strategically placed on the top and bottom and a heatsink design that encompasses the entire body, the V3 stays cool, ensuring sustained performance without the risk of overheating.

Small but mighty

Don't let the V3's compact dimensions fool you. This amplifier packs enough punch to drive passive speakers with ease, making it a versatile addition to your HiFi system. Whether connected to a turntable, CD player, or DVD, the V3 turns any source into a concert-like experience.

Product highlights

  • Maximum power output of 600W (300W x2)
  • Innovative cooling system for enhanced heat dissipation
  • Utilizes Texas Instruments TPA3255 Class-D amplifier chip for efficient power
  • High-quality components for superior sound quality
  • Logarithmic Taper A Pot for precise volume control
  • Replaceable op-amp chips for customizable sound
  • Compact design capable of driving passive speakers


  • Model: V3
  • Chip set: TI TPA3255
  • Output power: 300Wx2 @4Ω 
  • Terminating impedance: 2-8Ω
  • Input mode: RCA
  • Output mode: Speaker output + pre-out
  • Frequency range: 20Hz-20kHz (±0.1dB)
  • SINAD: 88dB
  • THD: 0.003%
  • SNR: ≥110dB
  • Control knob: Built-in logarithmic Taper A Pot
  • Device dimensions: 6.5” x 4.1” x 1.4”
  • DC input range: 24-48V
  • Power supply: 32V/5A

What’s included

  • V3 Power Amplifier x 1
  • 32V/5A Power Adapter x 1
  • User’s Manual x 1

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