Indeed, Matt contacted me offline, as Michael suggested, with my feelings above...
The Doctor (Mechans) and I evaluated those Shuguang 12AX7B when they were newly introduced, and they simply floored us. In fact, because of that, we organized a 12AX7 shoot out, where maybe 15 - 20 (WAY too many) folks attended. We used the Jadis DA60 as the test mule, with the tube under evaluation in the amp's driver positions. Interestingly enough, opinions across the group proved quite consistent. The Shuguangs made the final round, placing in the top (along with Telefunken ribbed plate, and the ultimate winner Sylvania triple mica black plate) 3, knocking out some truly (Telefunken smooth plate and Mullard) surprising contenders.
The Doctor (Mechans) and I evaluated those Shuguang 12AX7B when they were newly introduced, and they simply floored us. In fact, because of that, we organized a 12AX7 shoot out, where maybe 15 - 20 (WAY too many) folks attended. We used the Jadis DA60 as the test mule, with the tube under evaluation in the amp's driver positions. Interestingly enough, opinions across the group proved quite consistent. The Shuguangs made the final round, placing in the top (along with Telefunken ribbed plate, and the ultimate winner Sylvania triple mica black plate) 3, knocking out some truly (Telefunken smooth plate and Mullard) surprising contenders.