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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. 

TSA1740 Bluetooth 5 mesh Audio Amplifier Board from buildcircuit on Vimeo.


TSA1740 is a 2x20W Bluetooth 5.0 audio amplifier board. It has a digital amplifier chip YDA174 on the board.

It is a 20W×2CH high performance digital audio power amplifier IC with two DSPs. This board can be powered by any DC 10V-18V power supply. It can be used to drive any 4Ω or 8Ω passive speakers.

It is perfect for your Hi-Fi application, the audio source can be cable input or Bluetooth. You may pair up the amplifier with a mobile phone or a computer that has Bluetooth function. Power up the amplifier board, use your phone or PC to search for a new Bluetooth device, the module will appear as "TSA1740", you can simply pair it up without PIN. Yes, it connects automatically with your device. You can then play your audio.

The highlight point is you can connect multi TSA1740 to let them works together. It's a Bluetooth network. When you set the board to "party mode", users can stream audio to many amplifier boards at the same time wirelessly.


One TSA1740 works with a smartphone 

How to use:

  1. Power up the amplifier board.
  2. If your smartphone has never paired with it before, you need to press the ON/OFF button first. Then use your smartphone to search for a new Bluetooth device. The board will appear as "TSA1740".
  3. Pair and connect it and then you can play your audio.
  4. When you use it next time, you don't need to press the ON/OFF button after power on.

Multi TSA1740 in party mode work with a smartphone

How to set the amplifier into party mode:

  1. Select one board as Master board. Let your smartphone get paired and connected with it. You can play an audio. You can hear the music from master amplifier speakers.
  2. Power on the other slave boards.
  3. Long press the master board party button.
  4. Long press the slave boards party button one by one to let them get paired up with master board. All speakers will have audio out.


Specifications typical @ +25℃, Powered by 12V DC, unless otherwise noted. Specifications subject to change without notice. 






Supply Voltage (VDC)



- 18

Idle Power

SD Floating




Standby Power

SD Connected to GND




Maximum Current

40W @ 4Ohm






- 86% -

Minimum Load Impedance





RL=8Ω, PO=4.5W, 1 kHz

- 0.05% -
Gain     25dB  

Residual Noise

RL=8Ω, A-Weighted

- 50 μV -

Input Impedance

- - 22KΩ -

Output Power

PVDD=14V, RL=4Ω, THD+N=10%

- 20W -

PVDD=15V, RL =8Ω, THD+N=10%

- 15W -

Bandwidth @ ±3dB



- 20KHz


@4Ω, 1W, 1KHz




@4Ω, 10W, 1KHz





  • Dimensions: 5.6cm x 12.6cm x 2.8cm
  • Bluetooth 5.0
  • Supports A2DP 1.3, AVRCP 1.6, HFP 1.6, HSP1.2 and SPP 1.2
  • Aux in/LIne in autodetect
  • Working voltage: DC 10V-18V
  • Pop noise reduction
  • Over/under voltage protection
  • Overcurrent protection
  • Over temperature protection 


  • Personal computer
  • Background music system
  • Musical instrument amplifier
  • 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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