Remember the acclaimed $20 T-amp from about 10 years ago? It ran on a bunch of AA batteries or a wall wart. I added a 13V 5amp linear power supply with great results.
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If you think you are getting "audiophile quality" anything, essentially retail for $30, you are fooling yourself.
The pictures look impressive to someone no familiar with the technology, with the beautiful black PCB, and those big finned heat sinks, and the clean look on the back of the PCB. It is smoke and mirrors.
Looking at these two, the "cheap" supply looks like it was made by someone who has a clue what they are doing. The upgrade looks like it was made by a hack.
You got taken. You know have a nasty, electrically noisy, poorly designed power supply, but as opposed to admitting your mistake, you are trying to turn it around. There is nothing "quality" about what you bought, but if the power of suggestion makes you think it sounds better, well then more power to you.