HiLetgo 2pcs TDA2050 Mono Audio Amplifier Module Digital Mono Amplifier Board AMP DC/AC 5-24V Output 5W-120W for Speaker

Worked as expected. I use a DC 12V power supply, connected an 8" full range speaker and tested with an electric guitar, sound is not very loud but clean. will be use as a practice amp.

Small size and a respectable amount of power output. I used one to power up the PA speaker output from my CB to the under hood speaker. Bumped it up just fine and custom installed into dash panel near glove box. Gibson guitar knob gives a nice touch. Great value for the money.

They seem to work okay. They are well made. A schematic would have been nice. From what I found it looks like the single supply schematic in the Unisonic Technologies Co. (UTC) spec sheet is very close. There are a couple value changes and this board has a 50K pot to common on the audio input. The wiper then goes to the C1 input capacitor. Also C5 on my board is 25V while all other caps are 35V or more. So change that if you want to use higher voltage.

This little mono amp board surprised me in the best way. Running it on a clean 12V supply, it delivers punchy, distortion‑free output that feels way bigger than the footprint suggests, and the board layout is tidy enough that wiring it into a project takes almost no effort. The screw terminals clamp well, the heat sink actually does its job, and the module stays stable even when pushed near its upper volume range. For DIY audio builds, props, or small speaker upgrades, the value is excellent and the durability feels solid for the price. Happy with this one.

I have mixed feelings on this one. My initial testing was a 12v 5 amp power supply using the headphone jack on my phone as a source. The output was an 8 ohm 4" speaker. Playing a song from YouTube, with both my phone and the amplifier volume at maximum it sounded like around 2 watts output. It was however clear / distortion free with zero heating. The build quality looks OK, but I suspect the main chip is a copy. There doesn't appear to be any heatsink compound. I'll rectify that before further testing. I just need more audio volume for my intended use. I'm going to try using a LM386 as a preamp and see what that does.

This item did amplify ausio, I'll give it that much. BUT, there was no way I could find a setting tor a symmetrical sine wave on the output. It was always distorted with a non-symmetrical sine wave. This wa at the recommended 24VDC supply level. Also, 5W out is a joke. While testing it, it was barely warm, then a crack sound and it quit. One to the trash! I can't recommend this for any type of use. Update: I decided to replace the IC. There is also absolutely no thermal compound between the TDA2050 and the heatsink. Just another negative item for this review. It's a pity, as this could be a good amplifier with a bit better design and assembly.

this amplifier works great in my homebrew ham receiver to step up the audio output from headphones level to speaker level. As noted in another review, the audio input polarity is wrong and the amp still worked but with a hiss in the background. I switched plus and minus and hiss greatly reduced. the audio out polarity and dc volts polarity were correct as shown in the pictures. I removed the volume control and replaced it with a panel mounted better quality 50k pot.

I used one of these as a linear solid state power amplifier. Depending on how hot the input is, you may have to add significant impedance to prevent overload which may cause nasty distortion above 65% on the volume pot. I measured 44KΩ impedance before working my way up to an extra 3MΩ above that to manage the overloading coming from my guitar amp modeler at 100% output. Another thing to mention is the power rating. If you look up the TDA2050 chip datasheet, you will see that the max RMS wattage is ~32W with a somewhat reasonable THD. It is highly unlikely that you will see anything above this without unacceptable audio quality. 120W peak is highly unlikely and realistically the description for this product should include RMS if it is going to list peak wattage in the title. That is a little misleading. Lastly, I assume the schematic (simple as it is) isn't listed or available for competitive reasons. That is a bummer.

They work OK but do not provide rated power of OEM semi conductors

The quality of the sound is poor.