[davisoly]

This USB “Purifier” by iFi is a low-cost tweak that makes audible improvement in your DAC signal. After about a year, I am selling mine because I bought a new Anedio DAC which apparently has this sort of tweak built in. The iFi Purifier costs $109 new. Mine can become yours for less than half that. Installed, you won’t notice a huge difference until sometime later you remove it from your system. Funny, but you don’t perceive the noise until its gone. Not jaw dropper, but it will make you sit up and blink twice! Absolutely worth the price.