I broke my minimalist vow to stop adding electronic boxes to my system when I was seduced by the positive comments about the Uptone Regen at the Computer Audiophile site. I liked the result very well indeed. Many on the CA site claimed additional improvement with a linear power supply for the Regen, so I ordered and awaited delivery of the inexpensive Chinese device CA posters suggested. Last Friday I taped the 5v pin 4 on the USB cable that leads from my Aurender X100 to the Regen--another CA inspired tweak. This was a major move to solid noise-free presence and clarity. I was listening with pleasure and delight when my doorbell rang. It was the postman, delivering the Chinese power supply (six days from China to Texas, amazing). I couldn't resist plugging it in at once. This was the best sound I have ever achieved with my Devialet 250, an additional clarity achieved by removing a potential noise source. (I did try the Jitterbug also, but it muddied the sound.)
Aurender N10 > Devialet 250 Expert Pro > Audio Physic Avantera