HiLetgo2pcs CT14 Stereo Bluetooth Amplifier Board 5V AMP F Class 5W+5W Amplifier Module with Charging Port for Speaker Modification DIY

These little boards fit anywhere, run on one 18650 battery for hours and sound great.

There is a loud noise when connecting to Bluetooth or at the beginning of the song. The volume is also quite loud even if it is minimized on the playback device. It can't be practical.

Nice little modules. Wired one up for my own homemade Bluetooth speaker. Would definitely purchase again.

I have these hairbrained ideas that I have to see through and this one came after I bought some ammo that came in this cute little ammo can and I couldn't bring myself to throwing it away. I had some oval shaped speakers sitting around that I pulled out of a smashed plasma TV many years ago and figured... why not.The sound isn't bad at all, especially in a quiet setting. It doesn't get super loud but I suppose pushing it much more than you get would result in clipping. For any setting that is fairly quiet it'll be plenty of volume but I wouldn't suspect that it would impress anyone at a pool with a lot of ambient noise.

Nice little amp works well for the use I bought it for.

I got the same JZ-B5W2 - CT14 but ver. 1.6 earlier and it has Phone-Call function.This 2 pack is ver. 1.8 AND HAS NO Phone-Call function.Add just a $1 and get the real CT14 ver. 1.6Its way better.And yes audio is terrible, cuts off between music gaps.

These are very small, pair well with phones and produce quite a bit of out put power. They will in fact run off of a USB cord without adding a battery provided you use a reasonable sized wall adapter. They are not very well shielded and produce a decent amount of stray noise. Should be careful placing next to sensitive audio equipment. One mounting hole and jacks on back side of board can make these a little difficult to integrate.

Terrible audio output. I would not buy again. I tossed mine