TDA7492 amp module output filter capacitor myth busting
The SKU145225 TDA7492 module off of Banggood has a really bad output filter design. It can certainly be improved, but will this particular viewer-suggested modification do any good?
The rundown is that the amplifier ships with some 220 nF caps in the output filter. They alone don't suppress the switching noise well enough. I figured out that replacing them with 100 nF caps makes it a little better (although not good). A viewer commented that replacing them with 470 nF is an even better improvement. I was highly skeptical of this claim, since the stock 220 nF caps were already too big to work correctly.
By connecting the amplifier up to my Xonar DX sound card through a most dodgy set-up, I was able to put his claim to the test, and figure out just why he thinks it sounds better - because it does make a difference.
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Видео TDA7492 amp module output filter capacitor myth busting канала FFcossag
The rundown is that the amplifier ships with some 220 nF caps in the output filter. They alone don't suppress the switching noise well enough. I figured out that replacing them with 100 nF caps makes it a little better (although not good). A viewer commented that replacing them with 470 nF is an even better improvement. I was highly skeptical of this claim, since the stock 220 nF caps were already too big to work correctly.
By connecting the amplifier up to my Xonar DX sound card through a most dodgy set-up, I was able to put his claim to the test, and figure out just why he thinks it sounds better - because it does make a difference.
--
THIS VIDEO IS RELEASED TO THE PUBLIC DOMAIN
To the extent possible under law, I have waived all copyright and related or neighbouring rights to this work, according to the Creative Commons CC0 affirmer. This means that anyone is free to use this content in any manner they see fit, without my objection. However, the video may still contain copyrighted content (images, video, audio, software, etc.) that does not belong to me. WHILE I DO NOT RESERVE THE RIGHTS OF ANY PART OF THIS VIDEO, THE COPYRIGHT OF THIRD-PARTY CONTENT STILL BELONGS TO ITS RESPECTIVE OWNERS. THE COPYRIGHT OF THIRD-PARTY CONTENT IS NOT WAIVED. THE VIDEO IS PROVIDED AS-IS, AND I DO NOT PROVIDE ANY GUARANTEE OF ITS QUALITY.
Видео TDA7492 amp module output filter capacitor myth busting канала FFcossag
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