Rkt008, I have used the RCA 5751 black plates, I like 'em. I just did another tube shootout this past weekend. The RCA 5751s sound great, just a smidge more highs than the EH12ax7s. Depending on your system and room they may be just what the doctor ordered. As far as the reduced gain, you can hardly tell.
My system and room tend to emphasize the highs(metal tweets, Bryston amp, Hardwood floors, silver hybrid cables, no drapes, etc.).
Muralman and I posted back and forth on tube selections. I agree with him completely that the EHs are just a bit laid back. Mural's system surely has quite a bit more resolutiuon than mine and I suspect he can hear differnces I cannot. However, for my system, I prefer the EHs, with the RCAs a very close second. I am seriously looking for the Sylvania 5751s but they are darned hard to find. Eventually I will find some. It may very well be, that I like them better.
My system and room tend to emphasize the highs(metal tweets, Bryston amp, Hardwood floors, silver hybrid cables, no drapes, etc.).
Muralman and I posted back and forth on tube selections. I agree with him completely that the EHs are just a bit laid back. Mural's system surely has quite a bit more resolutiuon than mine and I suspect he can hear differnces I cannot. However, for my system, I prefer the EHs, with the RCAs a very close second. I am seriously looking for the Sylvania 5751s but they are darned hard to find. Eventually I will find some. It may very well be, that I like them better.