The Threshold NS 10 was Nelson Pass first preamplifier bearing the Threshold name. And was one of those early over the top products from the mind of Nelson Pass. While the cosmetics of this unit were more like a laboratory audio preamp as opposed to the next generation preamp from Threshold being the SL 10. The SL 10 cosmetics were very good with its lower profile,sculptured control knobs and separate power supply and remains to this day a stunningly beautiful preamp. The Threshold NS 10 preamplifier embodies design concepts and empirical performance that set new boundries for the classification” state of the art”. The NS 10 utilizes a signal path so simple,so distortion free and so extraordinarily fast that it is virtually incapable of degrading any information passed through it which is in the range of human perception.