I am launching this thread to be a collective forum for discussion about all sorts of USB signal purifiers. We all know, USB signal is noisy, therefore any sort of purifying technology is welcome. Let's look for the best one together and share experiences! (I know, there is a popular Eitr thread covering a lot, but I couldn't find a universal thread dedicated to USB signal improvement.) I have been using AudioQuest Jitterbug for a couple of years, and just testing iFi iPurifier 3 these days. They definitely make an improvement, but it is system dependent. Share your experience, share your thoughts. Do we need these USB devices? Are they worth the money? Which one is the best for the money? My iPurifier 3 review is coming up, but I can already tell it is a positive disappointment. I wanted to dislike it, but I have to admit both the Jitterbug and the iPurifier 3 make a worthwhile difference in my system. Now I am wondering if the Schiit Eitr is a better choice over the Jitterbug and iPurifier 3 combo. Any thoughts?