Up for sale is a pair of 2.5 month old Shuguang Treasure CV-181 6SN7GT Matched Tubes (Premium Grade A) that were purchased straight from Woo Audio for my WA5 tube amp. These were purchased for $320 and have a 12 month warranty in case anything happens to them. These tubes are in mint condition with no visual flaws whatsoever. They were burned in for the recommended 300 hours right after purchase and then only listened to for an additional 50 hours. In other words you are purchasing like new tubes that have already been burned in for you.
I have owned a whole bunch of 6SN7 variant tubes (such as Ken Rad VT-231, Sylvania 6SN7W, RCA VT-231) and the Shuguang CV-181 were by far my favorite in terms of transparency, detail level, low noise, and impactful bass.
I purchased these for $320 a little over 2 months ago and am selling them for $SOLD shipped. As I said, they still have over 9 months left on their warranty through Woo Audio. I have had great feedback on head-fi over the years: http://www.head-fi.org/forum/thread/169369/monsieurguzel.
Edited by monsieurguzel - 9/10/10 at 2:49pm