Fosi Audio BT20A PRO 300W x2 TPA3255 2 Channel Bluetooth 5.0 Power Amplifier

300 Watts x2 Power Output: Provided by the TI TPA3255 chip which features an advanced feedback design and proprietary high-speed gate driver error correction. In addition to excellent audio performance, TPA3255 achieves both high power...
MODEL: Blue+32V
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Overseas warehouse shipping 3-5 days, China warehouse shipping 7-15 days.
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  • 300 Watts x2 Power Output: Provided by the TI TPA3255 chip which features an advanced feedback design and proprietary high-speed gate driver error correction. In addition to excellent audio performance, TPA3255 achieves both high power efficiency and very low power stage idle losses below 2.5W.

  • High Efficiency: A significant upgrade from the BT20A amplifier. There're two plug-ins NE5532 Op-Amps can be replaced by SS3602MUSES02,  OPA2134PA Op-Amps, etc. To create a different sound quality. SNR≥108dB; THD≤0.005%.

  • Upgraded Bluetooth 5.0 connectivity: By pressing and holding the volume control for five seconds, the Bluetooth pair can be cleared. In addition, it has a Bluetooth memory function, so it can be easily paired the next time. It also receives an alert tone.

  • Sound Control: With its unique design, the BT20A Pro amplifier for home audio has a wide range of bass and treble controls. Alternatively, you can turn the treble and bass effects to a middle point to listen to the original sound without effects.

  • What you Get: BT20A Pro Power Amplifier x1(The plug of the power adapter will match the country of your delivery address), Bluetooth Antenna x1, 32V 5A Power Adapter x1, AC Cord x1, User Manual x1, our worry-free 24-month warranty, and friendly customer service.

  • Tips: If you don't require a Bluetooth amplifier as much, you can consider the TB10D. It has the same chip and power output, but at a more affordable price!


High-End Amp Chip Integrated


Specifications Details
Model BT20A PRO
Output Power 300Wx2 @4Ω
Terminating Impedance 2-8Ω
Input Mode Bluetooth + RCA
Output Mode Passive Speakers + Pre-out
Frequency Range 20Hz-20kHz(±1.2dB)
THD ≤0.005%
SNR ≥108dB
Chip Set TPA3255
Bluetooth Transmission Distance Up to 50Ft
Bluetooth Transmission Format SBC/AAC
Device Dimension 5x5x1 inches
DC Input Range 24-48V
Power Supply 32V 5A

What‘s in the box?

Item Quantity
BT20A Pro Power Amplifier x 1
Bluetooth Antenna x 1
32V 5A Power Adapter x 1
AC Cord x 1
User’s Manual x 1

Tips: The plug of the power adapter will match the country of your delivery address.

Worldwide Shipping

We can ship to any country or region in the world. Shipping is free worldwide, except for special regions/countries where we are unable to offer shipping, such as Ukraine.

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

1. Overseas warehouse delivery

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.

Order processing time: All orders require 1 business day for preparation and packaging, excluding Saturdays and Sundays. Holidays will be extended according to China's legal time.

Pre-order products: The shipping date is based on the specific product labeling.

After shipment, you can track your order. To track your order, please click here.
United States, Canada, United Kingdom: 3-5 days.
Germany, France, Italy, Netherlands, Portugal, Spain, Sweden: 3-7 days.
Other countries:3-10 days.

Note: If there is a stock shortage in the overseas warehouse, the delivery time may be extended by 5-15 days. We will contact you via email, and you can also inquire with our customer service regarding the delivery status. 

2. China(Shenzhen), shipping worldwide via 4px.

Order processing time: All orders require 1 business day for preparation and packaging, excluding Saturdays and Sundays. Holidays will be extended according to China's legal time.

Pre-order products: The shipping date is based on the specific product labeling.

After shipment, you can track your order. To track your order, please click here.
Ships from China warehouse, standard shipping usually takes 5-15 days, fast shipping takes 3-7 days ($25 shipping fee applies)

Note: If there is a stock shortage in the China warehouse, the delivery time maybe extended by 5-15 days.
We will contact you via email, and you can also inquire with our customer service regarding the delivery status.

Not all products have stock in other warehouses. If you require urgent delivery from another warehouse, please confirm with us first. 
If your order does not display any shipping time, it is usually because you have purchased multiple products, each from a different warehouse, resulting in the inability to display the normal shipping time. It will default to 5-15 days. 
If you have any questions, please feel free to contact us.


European Union (EU) Countries:

For shipments from the China warehouse to EU countries: 

The final price you see on the official website includes taxes.This way, you don't have to pay the taxes yourself, saving you time and effort.
However, if you prefer, you can choose to pay the taxes yourself, and we will refund the taxes paid through our platform.

Other Countries:

The final price you see on the official website does not include taxes. Imported goods/services may be subject to taxes and are governed by local country/region laws. We do not collect any taxes or value-added taxes, nor do we assume any tax liability. 
If you have specific requirements, please contact us.

For countries with complex customs procedures, such as South America, we recommend ordering through AliExpress or finding a recipient in North America to assist with the shipment.

 Note: Remote addresses may experience longer delivery times and incur additional costs.

✓ 30 Days Free Return

At Fosi Audio, we always strive for the highest customer satisfaction. If you are dissatisfied with the product or if it has any defects, you can request a return or refund.

Within 30 days of purchase, for any reason whatsoever, undamaged products can be returned for a full refund. Once the returned items are inspected upon arrival at our warehouse, the refund process will be initiated.

Items must be in their original packaging. For non-quality related return requests, the buyer is responsible for the return shipping costs. Returns that do not meet the above requirements may be rejected.

We cover return shipping costs for the following situations:

  1. Defective parts.
  2. Damaged equipment.
  3. Incorrectly shipped items.

The 30-day period starts from the day you receive the item.

*If your order exceeds the 30-day free return period and it is still unopened, you may still apply for a return. However, you will need to bear the return shipping costs, and a 15% restocking fee will be charged. (This situation only applies to products purchased from

How can I initiate a return?

  1. Please contact Fosi Audio customer support to initiate the return. Explain the reason for the return and provide the invoice or screen capture to confirm the order number.
    customer support email:
    Phone: 00852-67645515
  2. Fosi Audio customer support will provide you with the return address within 1-2 days.
  3. To expedite the refund process, make sure to send the return notification to Fosi Audio customer support with the following information:
  • tracking number
  • shipping receipt (If shipping fee refund needed)
  • PayPal account (If shipping fee refund needed)

How long will it take to receive the refund?Once the returned items reach our warehouse, we will promptly process the refund. The refund will be made using the same method as your original payment. The processing time usually takes 3-5 business days.

Customer Reviews

Based on 47 reviews
Peter Donnelly
BT20 Pro

Fantastic service thank you , Summer was very good to deal with

Packs a punch!

I ordered this small bluetooth amplifier to power the speakers in my alfresco area. Although small, it packs a powerful punch! From the ease of bluetooth pairing to controlling the output in terms of treble, bass and volume, this little amplifier holds its own. I am considerably impressed! I would not hesitate in recommending this product if you are seeking a simple solution.

Gordon Wilson

Unbeatable value for money. My particular interest was in Bluetooth capability which this delivers in spades. Sound quality excellent, customer service and delivery time very good and the option of 48v power brick is class leader.

great little unit

Plenty of power, running 3.2 ohm speakers, easy setup. I wish their za3 had BT.

Christopher Cassell
Fosi Audio BT20A PRO

Excellent little amp- very compelling for the price- excellent customer service from Fosi as well- get one!

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