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
Your associated gear is limiting the effect you will hear by rolling tubes in the Jolida. No disrespect. It's just the way it works.

As any system moves toward higher end gear, the system's ability to resolve detail increases...like that which would be heard by rolling tubes.

The audible effects of all tweaks, including interconnects, speaker cabling, power cords and isolation, will be difficult to discern.

It's probable that you will hear differences by rolling tubes, but the differences will be less obvious as they would be with different electronics and/or speakers.
Personally, I don't always see a need to use a 5751. It may handle more voltage but, unless your amp can utilize the current, your money may be better spent on nice telefunken 12ax7's.
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....