This was posted 3 years 6 months 4 days ago, and might be an out-dated deal.

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TPA3116 50wx2 Bluetooth Amplifier A$8.19, DIY Bluetooth Speaker with LED Water Flowing Light A$24.75 +A$6.60 Delivery @ICStation

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ICStation, China
ICStation, China

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  • I have a couple of the little amplifiers (bought from aliexpress) and i'm have been quite impressed for the cost and size.

    I have one running with some small powered bookshelf speakers after the internal amp died with a 12V 3AMP powersupply and they can get to decent volumes without distorting.

    • I used a TPA3116 and made my own Bluetooth speaker out of some old stereo speakers. I now have a boombox-style Bluetooth speaker that will blow away almost any other for about 16 hours.

      • What do you power it with?

        • 18650's in mine :)

          • +2

            @MasterScythe: Yep, salvaged 18650s x4. I put a BMS on it. Actually, I used a separate Bluetooth module because the amp I got didn't have it built in.
            I found 2x Sony 100W speakers on a footpath cleanup. Hacked the speakerbox to hold all speakers (4 cones in total), powered from an old laptop power supply.

  • Does the Class D version have noticeably better sound quality?

    • +1

      I think they're all Class D, the difference is in features (e.g. memory card support)

    • My understanding is that D Class is most efficient in converting the electrical power to sonic power… Works similar with the pulse width modulation for motor drivers.
      my2c

  • I am surprised there don't seem to be many of these modules around that are dual channel, plus third channel for sub woofer.

  • +2

    Is this rated at 50w RMS or 50w peak power?

    • Please let me know when you find out

      • 50w RMS

    • 50w RMS

  • Other than price, is there any reason to get an IC like this rather than something like a Douk Audio/Nobsound NS-10G or something?

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