Upgrading power Supplies for Chord Qutest & Lumin U2 mini

After reading about people who have upgraded their power supplies from a wall wart to a linear power supply. I recently made the upgrades as follows:

1. Chord Qutest-purchased the S-Booster from Upscale Audio.

2. Purchased a Linear Power Supply manufactured by LHY Audio from Vinshine Audio.

Both have been installed and the differences are as follows:

1. Quieter backgrounds, more bass. The key for my ears is that since the distortion and noise has been reduced the listener hears more of the music.  There is a noticeable difference. I would recommend upgrading to a linear power supply, as I believe it is a cost effective way to improve your sound. There are many manufacturers that sell their own power supplies.  I did some research and decided on the 2 that I purchased. Not a dealer, just a listener.