For Sale: 4 Nordost Qv2 AC Line Harmonizers and 2 Nordost Qk1 AC Enhancers. The AC Line Harmonizer is designed to enhance the musical performance and picture quality of any audio or video system. The Qk1 AC Enhancer use a load-resonating coil to genrerate a passive electronic field that has a beneficial sonic benefit on the AC current. Excellent results when used separately; best used together. Simply plug into any free socket/s in you system's AC line. The Qk1 retails for $250 each; the Qv2 retails for $350. Together, all 6 units retail for $1900. Will only sell as a package. See my feedback and buy with confidence.