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jolida jd 100 and rca command 5751

I replaced the stock chinese tubes in the jolida cdp with the above mentioned tubes(rca command 5751). I was expecting to hear a substantial difference but I have not so far. Has anybody tried these tubes with the jolida and what was the result.My system consist of ascend cbm 170 speakers,nad c320 bee integrated amp.
jund

Showing 2 responses by thorman

thorman
1,262 posts
 
Have to agree with Elevick,not all preamps like 5751 tubes. I tried a few my self due to all the hype I had read about the 5751 ( Joes' tube lore on audio asylum ).I tried the GE jg5751 Black plates and the RCA 5751 b/plates and found them to mask the midrange, and the dynamics weren't all that great. Just my system ? Maybe ? I would try Telefunken or Tungsram or Amperex Bugle Boy 12ax7 .Anyone of those 3 will do very well. The Amperex Bugle Boy is more organic than the Tele or Tungsram . The Tungsram ( to me )is even better than the Telefunken...Just my 2 cents.Hope it helps....
thorman
1,262 posts
 
I've tried the EH 12ax7 you mentioned in my Thor T1000mk2 and found their were much too laid back and dark for me.I honestly can't find a better ( neutral ) 12ax7/5751 for my ( tried many ) system than the Svetlana 12ax7 ( winged C ). I have tried NOS- Tungsram,Mullard,Telefunken,Ge. New Sovtek (all ),JJ, and others I am sure I have forgotten but always come back to Svetlana ( winged c ) . It seems in my system its the best/neutral and natural all around 12ax7 tube with the least amount of flaws....Go figure !
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