Well made, high quality and functional. No degradation of sound was detected. Package does not include instruction on proper 2Pin orientation when connected, nor is the polarity of Any of the pins marked. Thus, one is forced to employ trial & error -hopefully one got it right. I, for one, am still not sure if I have connected the adapter correctly. Using the "contact form" on its website, I reached out to Optimization Elements, also known as OE Audio, for help with this issue; but I have yet to receive a response. Good product but lousy support service, just so you know.