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20w (approx.) bluetooth amplification cards that interconnect with each other

willtwomarc

Hello, I'm looking for 20w (approx.) bluetooth amplification cards that interconnect with each other

voltage range about 9-12V.

If you have any ideas of brand and model I'll be happy to hear you.

Thanks

William

Parents

  • Walfrontv87at4wck1 is a dual 15W BT amp

    The absolute maximum power you can generate with 12 volts into an 8 ohm load is 18 W, even with a bridge-tied-load configuration. RMS power would be much lower for audio signals. Do you have 4 ohm speakers (which could be double the power)?

    When you say interconnect, what do you mean? Do you mean you want to broadcast to multiple BT amps simultaneously? I believe Bluetooth has a broadcast pairing mode for this.

  • in reply to dougw

    Thanks, I'm explain better.

    Image that I have 5 pieces 30w speaker in different positions like a circle, about 5 meters distance each speaker. I would like to use for every speaker a proper Bluetooth power card. But I would like to send the audio from only one device as my phone. So the phone send the signal to one Bluetooth card, and all 5 cards interconnected each other receive the same music, so the 5 speakers need to be interconnected each other. I'm looking for a card with about 20-25w, 9 V that has the possibility to be connected fast and easy with other cards. Is like the system used in the Sony Bluetooth speakers or JBL etc, where if you buy more speakers you can interconnect using a simple button .

    I hope I'm explained well

    Thanks in advance

    William

  • in reply to willtwomarc

    It sounds like you want your audio source to simultaneously broadcast to multiple Bluetooth speakers. Bluetooth isn't a great standard to perform this function but you can check these out:

    https://www.youtube.com/watch?v=bwRXatrQ1mw

    https://www.youtube.com/watch?v=0jL7Af4fxek

Reply Children
  • in reply to dougw

    Many thanks for your solutions, really! 

    The best one for me is a BT card like this in the picture, do you know something similar?image

  • in reply to willtwomarc

    I don't think you can pair a bunch of these to the same BT audio source at the same time.

    One way to solve it is to broadcast audio over FM radio.

    You could use a Bluetooth to FM transmitter like this: (cost < $6)

    image

    Then on each speaker you could put a small FM receiver amp like this: (cost ~ $6 for each amp)

    image

  • in reply to dougw

    Thank you Dougw for this solution, I can try It.

    But for my project I need to find a BT card. For example if you have time to check the JBL flip 4, this model have the possibility to connect with other speakers with Bluetooth, so imagine you are in a party, playing only a JBL flip 4, now arrive a friend with another JBL that with only a button connect to the first speaker. I need something like this, but the real problem is that I don't know how to write online to find the Power BT Card like this. 

    I can try to disassembly the JBL flip 4 and try to read the brand of the card, but I'm not sure to find data.

    Sorry for the long story but the best for me is a solution like this.

  • in reply to willtwomarc

    JBL only uses Bluetooth to connect to 1 speaker, all other speakers connect to the first speaker via a proprietary JBL wireless protocol (Connect or Connect+)

    This means you would likely need to buy a bunch of JBL speakers. There are other proprietary wireless broadcast systems like the Bose system, but the only cheap way I see is to use FM broadcasting.

  • in reply to dougw

    Ok, really thank you for your help.

    I'll check this out carefully!

    Have a nice day 

    William