I tried 5751's in my Rogue Audio Tempest and did not care for them.I used some NOS Sylvania and RCA 12ax7's with real good success.I then tried a set of Amperex 7025.They sound great and have taken up permanent residence in the Tempest.The music sounds more "real" to me,and isn't that what it's all about.They may or may not work for you.Give them a try,you might be pleasantly surprised.
