NOYITO DC LC Filter DC EMI Power Filter 0 to 50V 2A 4A 10A 20A Filtering Board (2A)

This 3 stage filtering board does a great job of cleaning up the DC voltage from a switching power supply. I had a 3 volt DC switching power supply for a radio. I wanted to use the radio's audio headphone output to go into another device on a permanent basis. With the DC power supply, the headphone output had a fair amount of static and general noise. On battery only, the radio was perfectly clean sounding. Using this filtering board, the noise and static level was eliminated from the power supply. I also added a ferrite core with 3 loops in it after the filtering board (which made very very little difference, but just icing on the cake). As long as you use the correct one for the amount of current you are using (always over the current never under), and keeping the supply voltage at half or below, this product will do a very good job of cleaning up the output voltage of your switching power supply.

Knowing some about electronics I knew what I needed. However was unsure what quality I would find for 10$. Funny this little thing works suprisely well. good price for what it does. Although for some reason it takes a few seconds to work (no idea why) after that it kills the dc noise. I used it to eliminate the dc from the 48v battery in our golf cart to the sound bar handing in the rear (Evolution Golf Cart). I just spliced it inline with the two dc wires and it works. Seems to be well built. Was easy to install.

Fabulous module for cleaning up d.c. power sources.

Great product, works well for my applications. Good price and shipping.

Tried it with several switching power supplies. No help.