Review on 🔊 5pcs LM386 Mono Audio Amplifier Module - Solo AMP, 200x Amplification, 5V-12V, Adjustable 10K by Sarah Brown

Poorly made circuit. Signal ground and power are first mixed at the front end, which at least adds to the main problem with this board design. totally useless distortion and in most cases no output other than a high frequency squeak (no matter where I set the onboard potentiometer). So far I've been able to get some sound by adding a 100kΩ resistor before the signal input. They also didn't seem to follow any of the best practice layout examples from the LM386 datasheet, although I can't say with 100% certainty due to another issue. They DO NOT provide USEFUL INFORMATION about the layout, such as: B. a schematic that can be used to determine if/where modifications can improve performance to a usable level. In other words, PLEASE PROVIDE THE ELECTRICAL CIRCUIT DIAGRAM and I will adjust my rating accordingly.