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This product will be shipped using FedEx (shipping cost per order: US$ 25). Delivery in 4-7 business days. Check out this page. 

This is TSA7492 2x50W + 100W 2.1 channels, audio amplifier board with AudioB pro Bluetooth module. It has the perfect class-D architecture (based on TDA7492 and TDA7498) and 2 channels have 50W power outputs and another one channel has 100W power output.

All the channels are capable of nominal power output simultaneously and continuously. This board can be powered with any DC 12V-26V power supply. It can be used to drive any 4Ω or 8Ω passive speakers. TSA7492 can also be connected with our TSA1000TSA1010, or TSA1020 external audio volume control board. Users can adjust the audio volume by rotating the real knob.

It's a 2.1 channels amplifier board. The channel for the subwoofer is 100W mono output. You can pair it with a mobile phone or a computer with Bluetooth.

Power the amplifier board, use your phone or PC to search for a new Bluetooth device. The module will appear as "TSA7492". You don't need a PIN, pair it up and play your music.

  • TSA7492 can auto-detect the Aux in/Line in Audio input. Bluetooth Audio source has a higher priority. When Bluetooth audio is paused or Bluetooth is disconnected, the amplifier will output the Aux in/Line in audio.
  • There is an audio connector that can connect with an external DSP to set the subwoofer audio tones.
  • BVC Port: BVC port can be connected with our Audio volume controller to control the Bluetooth audio volume. 

Subwoofer tones set port:

Connect an external potentiometer to control the subwoofer volume separately

Buttons control port:

There are 3 buttons on the board which can control the audio volume and play/pause. You can connect external buttons easily by using the buttons control port.

Pins define: (Check the board backside silkscreen):

P/P: Play pause button

VOL+: volume increase and forward button

VOL-: volume decrease and rewind button



TSA7492 can auto-detect the Aux in/Line in Audio input. Bluetooth Audio source has a higher priority. When Bluetooth audio is paused or Bluetooth is disconnected, the Amplifier will output via the Aux in/Line in audio. 

TSA7492 + TSA1000, both Aux-in and Bluetooth audio volume can be controlled through the BVC port. 


Specifications typical @ +25℃, powered by 25V DC, unless otherwise specified. Specifications subject to change without notice.

Parameter Condition Min Typ Max

Supply Voltage (VDC)

- 12 25 26
Power output per channel RL= 8Ω, 10% THD+N     40W
RL= 6Ω, 10% THD+N     50W
RL= 8Ω, 1% THD+N     32W
RL= 6Ω, 1% THD+N     40W
100W channel: RL= 6Ω, 10% THD+N     100W
THD+N 1W   0.1%  
 Frequency Response (dB) ±3dB 20 - 22K
Operating Temperature (℃) - 0 20 50

Minimum Load Impedance


Gain 50W channel 21.6dB 27.6dB 33.6dB
100W channel 25.6dB 31.6dB 37.6dB

All channels output rating power.


Input Impedance (Kohm)

- 48 60 -



  • Size: 14.4cm x 7.8cm x 3.4cm
  • Bluetooth 4.0
  • Bluetooth audio volume control port (BVC)
  • Aux in/LIne in auto-detect
  • 2.1 channels
  • Working voltage: DC 12V-26V
  • Over/under voltage protection
  • Over-current protection
  • Over-temperature protection 


  • Personal computer
  • Background music system
  • Musical instrument amplifiers
  • Home DIY
  • Car audio


Customer Reviews

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  • All the order are shipped within 2 business days. 
  • Products are either shipped from China or Australia. Item locations are mentioned on the product page.
  • Customers will receive tracking code if they have selected the 'shipping method with a tracking code'.
  • Returns are accepted if the customers return the items within 1 month to our address in Australia. If the item has been shipped from China, the customer still has to return the item to Australia. 
  • Return post fees have to be paid by customers. If the product is defective, we will pay the shipping fees.


Shipping fees for Australian addresses(Item Location: Australia):

  • Standard Post- using Australia Post: US $5.95 ~ AU $9.00 
  • Express Post: US $9.95 ~ AU $15.00


Shipping fees for international addresses (Item Location: Australia):

  • Standard Post with tracking code: US $17.50 ~ AU $26.50
  • Express Post with tracking code: US $36.50 ~ AU $55.00


Shipping fees for Australian and international addresses:(Item location: China):

  • Registered post with a tracking code: US $3.95 ~ AU $6.00 
  • Express Post with tracking code: US $25.00 ~ AU $38.00 


How long does it take to reach the USA, UK, Germany, Australia Canada and other EU countries?  

From China: If we ship from China, the delivery time can be from 7 working days to 15 working days. See the proof on the images below. US based orders are delivered more quickly than other countries.

Most of the USA, UK, Canada, Australia, and Germany  based orders are delivered within 7 days. However, because of customs related processes, it can sometimes take up to 15 days.  Check out all the shipment proof images on this page. 


From Australia: If you have chosen standard post, you will receive your parcel in 3-5 days (in Australia) and 5-7 days (outside Australia)

If you have chosen economy post, you will receive your parcel in 3-5 days (in Australia) and 15-25 days (outside Australia)


What is the proof that we really ship and they are delivered ?

 Check out all the shipment proof images on this page. 


Where do we ship from ? 

We ship our products from Australia and China depending upon what you purchase. BuildCircuit's original products are shipped from Australia. 

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