jolida jd 100 and rca command 5751

I have given the rca command some 50 hrs or so burn in time and have noticed improved sound in both depth and details. Despite this I succumbed to the urge of trying other tubes, not nos this time and see how they compare. I have just placed an order for eh gold pin 12ax7eh. I have heard good stuff regarding these in this player. Has anybody else compared these 2 tubes(rca command 5751 vs. eh gold pins 12ax7)?

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 !

I finally got the eh 12ax7eh gold pins and allowed at least 50 hrs burn in time to judge them. I thought they definitely sounded better than the stock chinese tubes the jolida came with but not superior to the rca 5751 command in terms of smoothness and depth. The rca's are still to my taste getting better and better each time I listen to them, so they are the keepers for now.