Best 6SN7 Pre Amp tubes?

How the Shuguang Black Treasures CV181-Z (6SN7) compare with Sophia Electric 6SN7 "A" Grade tubes? Any recommendation for ModWright LS 100 pre amp?

erasto09-04-2011 7:29pm

p100 Details Discussions Posts This discussion Message User 15 posts 09-05-2011 at 03:29am Copy Comment URL Report Comment Edit Delete My answer may be partially relevant. I have BT and Kenrad black tubes. The BT is more open and Kenrad is smoother.