HiLetgo® PAM8403 Digital Amplifier 2 5 5V Review

Performance increase, but not as much as I had hoped, nevertheless it is difficult for me to say without further ado, that was enough, because the main thing is that I will use them because I went bankrupt. So I only had an MP3 player as input. and I was able to turn the volume down even further than without the amp, so it works. just not sure how well.

This thing has reasonable gain, 20dB or x10, I've boosted the inputs with 80k series and it works for my needs (1.3 or 2.3dB gain). I suspect that many of the "failed" boards here could be due to the PAM8304 getting too much input to boost (0.5V would transfer it to the 5V rail). Try adding 100K potentiometers on the board before experimenting and make sure you start with a 100K series resistor and work your way down.

These PAM8403 amplifier modules won't win an audiophile quality award, but they sure are fun for Bluetooth speakers and 5V applications. They have a tiny form factor and are very easy to connect. I've used them to connect bluetooth speakers to a simple stereo mono summing circuit. It's really easy to build at least a working prototype with it. It's hard to beat the price with 5 of them.

I wanted to wait to say I had a chance to use them before writing the review so here it is. So far I've built with 3 out of 3, one worked and I don't have high hopes for the other 2. As a product, I love the idea of tiny little boards they stick in whatever is problematic. all work and none of the five work, if they can make something of that size that would work I would buy it, hopefully someone who has ever bought them besides me has better luck with them

I'm using this to build RetroPie and testing the sound quality has been great so far! It seems like it needs a decent amount of power for such a small board, and that's especially handy as it can run straight from the battery without having to step up to 5V! Doesn't save too much as efficiency is usually quite high, but eliminates the extra current needed for amplification! Price!

So far there are no complaints about it. I used it in an old external speaker accessory with a regulated 3.7V power supply and in another test speaker with an unregulated 5V power supply, the sound is about the same in both cases. I have only tested voltages from 3V and no higher than 6V without any problems. This may not be a huge issue for most as electronic components are now more durable than before, there can be DOA from static shock, x-rays or magical versions of 5G frequencies. The…

Works great with Microbit to amplify sound samples instead of using headphones. The only problem is that they didn't expose the input contact for trigger control, so you can't use the low-power <1 microamp features for battery-powered applications. Also, a schematic of the board would be nice to let us know what the extra connection between power and ground is for. -1 star for not bringing out the very useful mute and mute pins (although mute isn't really needed as it's really quiet when…