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Fosi Audio V3 300W x2 2.0 Channel Hi-Fi Stereo Audio Amplifier with TPA3255 Chip


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✈️ Free Shipping 🗳️18 Months Warranty

👉️👉️ Get $15 off the Early Bird Discount Promo

TPA3255|300watts x2@4Ω|Hi-End Capacitors & Inductor


1. Innovative Case Cooling System

2. Replaceable Op-Amp Chips: MUSES02, OPA2604AP, OPA2134PA

3. Speaker Output + Pre-out  

4. Logarithmic Taper A Pot

5. Replaceable Knobs: ORANGE KNOB

The pre-ordered items will be shipped before the official release date.

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Model: Black+32V

  • Black+32V
  • Black+48V
Out of stock

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  • 300 Watts x2 Power Output: Fosi Audio V3 is a mini HiFi class-D power amplifier that delivers a maximum power output of 600W into two channels, ensuring a powerful and high-fidelity audio experience.

  • Innovative Cooling System Design: Fosi Audio has made significant breakthroughs in the thermal design of the V3 amplifier. There are vents on the top and bottom of the case, and the chip heatsink is attached to the case to realize the whole-body heatsink design, enhancing air circulation and heat dissipation. Its special design allows for extended usage without compromising performance or causing any detrimental effects.

  • Hi-End Sound Quality: With Texas Instruments' TPA3255 Class-D power amplifier chip,the V3 amplifier achieves exceptional power efficiency. With audiophile-grade materials, such as Sumida professional audio inductors, NCC high-capacity filter capacitors, German WIMA Output Capacitors, Japanese ELNA Capacitors, etc. Those high-quality components allow V3 to maintain very high stability even under high-power working conditions. With the V3, you can truly have an almost distortion-free music playback experience.

  • Enjoy Linear Volume Control: Built-in logarithmic Taper A Pot, the V3 amplifier is specifically crafted to meet the demands of audiophiles, Manage the audio volume in a much finer way suitable for human ear, providing an immersive and pure sound enjoyment. 

  • Customizable Sound Signature: The V3 amplifier features replaceable op-amp chips, there're two plug-ins NE5532 Op-Amps can be replaced by MUSES02, OPA2604AP, OPA2134PA Op-Amps etc.enabling users to experiment and achieve their preferred sound signature by swapping different op-amp chips.

  • Compact and Versatile: Despite its compact size, the V3 amplifier has the capability to drive passive speakers effectively, making it a versatile choice to turntable amplifiers, CD player, and DVD for creating a complete HiFi system.

  • What you Get: V3 Power Amplifier x1, Power Adapter x1 (The plug of the power adapter will match the country of your delivery address), User Manual x1, our worry-free 24-month warranty, and friendly customer service.

Fosi Audio V3


Specifications Details
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(±1.2dB)
THD 0.003%
SNR ≥110dB
Control Knob Built-in Logarithmic Taper A pot
Device Dimension 6.5x4.1x1.4 inches
DC Input Range 24-48V
Power Supply 32V/5A, 48V/5A

What‘s in the box?

Item Quantity
V3 Power Amplifier x 1
32V/5A or 48V/5A Power Adapter x 1
User’s Manual x 1

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Worldwide Shipping

1. Overseas warehouse delivery
2. China(Shenzhen) delivery

1. Overseas warehouse delivery

United States, Canada, United Kingdom, Germany, France, Italy, Netherlands, Portugal, Spain, Sweden and Hong Kong, Macau, Taiwan in China are free shipping for you, it needs 1-10 days.

Fast Shipping Free 1-5 days

Note: Some products are out of stock in overseas warehouses, the time limit may be extended by 5-15 days, you can consult customer service in advance, sorry for the convenience. Hong Kong, Macau, Taiwan in China will ship from Shenzhen via 4px.

The United States, shipping to United State via USPS/UPS, which needs about 1-5 days for delivery.

Canada, shipping to Canada via Canadian Post, which needs about 3-5 days for delivery

The United Kingdom, shipping to the United Kingdom via Royal Mail which needs about 3-5 days for delivery.

Italy, shipping to EU Countries via suitable shipping method, which needs about 3-7 days for delivery.

Spain, shipping to EU Countries via Correos to Spain, to other EU Countries via Spain GLS, which needs about 3-5 days for delivery.

2. China(Shenzhen), shipping worldwide via 4px.
if you choose standard shipping, it needs about 15-30 days for delivery.

if you choose fast shipping, we will send it via express shipping for you, which only needs about 7-15 days.

Standard Shipping Free 5-15 days
Fast Shipping $25 3-7 days

All the items you can buy are in stock in a Chinese warehouse, but not all the items are in stock in other warehouses, if you need it urgently shipping from the other warehouse, please confirm it from us first!


Our products are not charged with tax and VAT and we don’t cover with tax amount. We usually help customers to declare the lower price to forbid the tax charged or lower the tax value. And most shipment is not charged with import tax By shipping from the US, EU, RU warehouse to the corresponding countries, there won’t have any tax charged. For some countries that have a complicated custom process like South America, we recommend you order on AliExpress or find a receiver in North America to help you transmit the package.

Note: Faraway address may last longer delivery and add cost.

✓ 30 Days Free Return

Fosi Audio always aims for the highest customer satisfaction. If you are unsatisfied with your products or the products turn out to be defective then you can claim a return or refund.


We afford the return shipping fee with following status:

  1. Defected parts
  2. Damaged devices
  3. Incorrect item shipped


*The 30 days period is calculated from the date you received the items.

*If you claim a return that exceed 30 days free return period or without any defected or damaged devices, you need to afford the return shipping fee yourselves.

*Please note: Some returns we may charge the shipping fee from you. Like change your mind or ordered wrong items when shipping is proceeded, then we will charge the shipping fee from your payments.


Return and refund process

  1. Send your order number and reasons for return and refund via mail to shopify@fosiaudio.com
  2. We will check your case and reply in 2 work days.
  3. If return acceptable then we will distribute the nearest after sale address to you to ship the return.
  4. After you ship the return items, then send the info below to us:
  • tracking number
  • shipping receipt (If shipping fee refund needed)
  • PayPal account (If shipping fee refund needed)
  1. After confirm your package is shipped, we will arrange the refund or replacement as soon as possible.



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Fosi Audio V3 300W x2 2.0 Channel Hi-Fi Stereo Audio Amplifier with TPA3255 Chip