Bluetooth Speaker Teardown - the electronics inside a wireless speaker

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In this video I take apart a typical Bluetooth speaker to show what is inside and give insights into how it works. The speakers, the printed circuit board, the electronics, . . . .
Many of us own and use Bluetooth speakers - they are really great because they enable the music stored on our devices like phones, tablets and laptops to be streamed to a speaker that can provide more volume and better quality than that available directly from the mobile device.
The Bluetooth speakers connect to the mobile device and effectively act as its loudspeaker. Many of them, like the one in the video have two speakers to provide stereo, although with such a small separation, this is not that useful, but the electronics is able to provide a greater level of power, and the speakers can provide better reproduction than is possible in most mobile devices.
However it is interesting to see what is inside the Bluetooth loudspeaker - understand a little about the electronics inside the box. The loudspeaker "drivers" as well as the electronics.
Also many Bluetooth loudspeakers have what is called a passive radiator which helps enhance the bass response. As the loudspeakers themselves are relatively small, they need additional measures to enhance the bass and make the audio coming from the Bluetooth speaker sound fuller and more interesting.
The inside view of the overall Bluetooth loudspeaker shows the various elements within the overall equipment - the various electronic components including he speaker divers, the Bluetooth integrated circuit and the power management system. All these electronic components are neatly laid out on the printed circuit board.
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Опубликовано:

31 май 2024

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Комментарии : 11

@ricksampson6780 2 месяца назад

Your website biography is most impressive, have you considered including more detailed technical content in your tutorials?

@ElectronicsNotes 2 месяца назад

This is a really interesting question, and it is something I am wrestling with. As I am sure you are aware, videos take a huge amount of time to make, and it is all about making what people want within a suitable time. I try to provide value and the information people want, but if I go on for too long, not only will it take much more time to make, but viewers also fall away more. That said, I must provide useful videos and this often means going into some depth. I will try to get the balance right. I will certainly bear your comments in mind for the future - thank you. As I mention in the videos, if you need more information, then there is a whole lot more on the website and there are links in the description.

@ricksampson6780 2 месяца назад

@@ElectronicsNotesMost comprehensive reply, thank you!

@aimforthecenter 2 месяца назад

Good video, as always. Thank you.

@ElectronicsNotes 2 месяца назад

Thank you very much for your comment. It makes such a soften people appreciate videos. Please keep watching.

@davidneufeld26 2 месяца назад

Interesting. I have a very similar speaker. But I was really hoping to see the battery because that's probably the lowest quality component and could use replacement. Would also have been good to see if there was any comformal coating on the PCBA.

@ElectronicsNotes 2 месяца назад

Thanks for your replay and useful feedback. There was no conformal coating not he PCB. I would not expect it on a consumer device. So you can access the PCB quite easily. Hmmmm . . as for the battery it is just a tubular battery that was glued to the back panel. Very easy to replace if you could get the right one. As every design will be slightly different, I would suggest that you open yours up to see what it has. The key thing I found was to take the speaker grill off and then remove all the screws to allow tthe speaker panel to be removed. Then you can see what is in there. Be a little careful to ensure none of the wires break. I hope that was helpful.

@davidneufeld26 2 месяца назад

@@ElectronicsNotes Hard to be sure if it was a cylindrical battery from the video. If it was a standard 18650 lithium ion then it could be hacked with an easy to find replacement. I suspect that the cheap manufactures use low quality or salvaged batteries with depleted charge cycles and capacity. Am curious of the battery type, capacity and any indication of built in battery management/protection circuitry. Thanks for the teardown and your response!

@ElectronicsNotes 2 месяца назад

@@davidneufeld26 it is quite possible it is a standard size. It is quite likely to be low quality but I would imagine it would not salvaged because they could not get the continuity of supply,

@davidneufeld26 2 месяца назад

@@ElectronicsNotes Would not surprise me in the least if there was an operation that retrieved parts from returned, stolen, unsold, discontinued, or quality-failed items in Shenzhen City.

@ricksampson6780 2 месяца назад

@@davidneufeld26I agree with your comments regarding component recovery in China.