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

did not try it yet but for the money you could not even start to build one. the output is probably IPP [instant peak power] for the 120 watts but you probably get 10 to 20 real watts depending on the supply.v anyway will uodate my review if need be.

As Advertised

The description is very misleading -- you will NOT get be getting 120W from this amp. The amplifier chip (TDA2050) is limited to 32W RMS maximum output. However, it did amplify a headphone level signal to a loud level (about 90 dB at ~ 1 foot distance from a 4 Ohm speaker) that would be fine for small rooms or close quarters. My application is to amplify a voice recording for a Halloween prop, and I do believe this will be loud enough for that. I tried both a 12V supply and 24V supply (both at 5A) and I didn't achieve anymore amplification using 24V, so perhaps I'm pushing towards it's upper amplificationn limit. At near full volume the amplifier started to distort, and in theory that would be around 30W give or take for 4 ohm speakers, so that adds up. The sound quality was pretty good at lower volumes.

Repurposed a bass speaker, that was being fed from a line level source from a surround sound system that wanted a powered subwoofer. This did the trick, and allowed me to individually set the bass level as well. Took off the cover, drilled a hole, fed the switch through, put on a nice cap, and fed it power from an old laptop power supply.

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.

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.

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.

The circuit is simply from the TDA2050 application notes so it is all good. However, the heat sink is probably undersized. For 20 watts audio out, the Heat sink should be about 3 degrees C/Watt. The heat sink on the board is about 10 degrees C/Watt. (add a watt the chip temp goes up +10C) The chip automatically shuts down when overheating, so if volume is high, it will clip, and more noticeable in the base. So as is, it should run fine up to about 7 to 10 watts which covers most single room and headphone to speaker applications. To get to 15 or 20 Watts or more, just add a bigger heat sink. Great value for the price!