I am trying to build a small singe driver full range active bluetooth speaker using some of those cheap class D amplifier boards you can buy everywhere on eBay etc. Many of them comes with a build in Bluetooth receiver too (e.g. https://www.ebay.com/itm/Digital-Amplifier-TPA3116D2-100W-2-120W-Wireless-Bluetooth-4-0-Audio-Receiver/163463699345) , but, they are of cause all stereo as far as I can find. Now my speaker design only allows 1 driver, so I fear missing out on parts of the music "picture" in a stereo signal, if I e.g. only wired the left channel. So my question is: What would be the easiest way to obtain the full audio experience in a singe driver setup via Bluetooth?

Some of the ideas I have thought about are:

  • that there maybe is a board doing exactly this, after all there are many single driver bluetooth speakers on the market..?
  • that I maybe need two different board, one for Bluetooth signal one for mono amp?
  • that I need to modify a board?
  • that I can find a small 4 inch driver that would somehow play a stereo signal?

1 Answer 1


Just bridge the output of the amplifier to the input of the speaker. Just bear in mind that the amplifier will be working at 240W instead of 120W per channel.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.