Best 6DJ8 tubes?


I have a Carver C-19 pre and SDA/490t cd, both use 6DJ8 tubes. Both units were recently serviced and had Sovtek tubes installed. The tubes in the cd player only have about 10 hrs on them, but the sound isn't nearly as warm as it was before replacing the stock tubes. I was wondering if anyone could recommend the best brand I could use, if 6922's would improve the sound, and the standard burn in time for the new tubes.
skipf
New tubes take between 75-100hrs. to fully break-in. and even after that the sovteks are still not going to sound that good. If money is not an issue, nos tubes will sound the best. Particularly amperex 6dj8's made in holland in the early to mid 1960's and of course the siemens-halski are suppose to be the best of the best. Unfortunately, the prices are very high(anywhere from $200-$300 pr.)sometimes you can find for $150 pr.
As was mentioned before the electro harmonix's are not bad for current production tubes also, the 6h23 russian tubes are not bad for the money either($27.95 a piece) but for my money the matsushita 6dj8's are the best of the lot after the amperex, siemen's mullard's and they can be had for $30 a piece from the the Tubemonger.
disagree with post about tube break in.....IMO there's nothing to break in....tubes only start deteriorating the moment you use them until they eventually fail. For NOS 6DJ8 I liked orange label Holland Amperex.....full bodied sound with good detail. Cheaper alternative is cryo EH 6922, but thats not a 6DJ8 but is replacement like the 7308.
Firstly- Extirpate the Sovteks post haste. They are bad from the start and you are correct never improve. Despite Joe's Lore, my British tube Guru told me to try the CV 2493, because it is the only tube in the family that doesn't sound blike any other it is better. Not even it's more common little brother the CV2492 sounds as good. If you nlike Siemens then chan chances are good that you will like these. They are Military Mullards but don't sound like a Mullard at all.
Upscale has them in stock which is a bit odd. They had not been seen for a long while. The picture shown is unlike any I had seen before. I found them eventually from "Tango Tubes" of Sweden. As probably NOS but they did a great job imitating an NOS tube NIB, properly faded original packing cigar roll paper etc. matched and a royally expensive of course.
I have no idea if they still have these relabelled cheap Sino tubes made to look exactly like the real ones snd even managed to sound just the same as the real ones as wewll. As I said they don't sound like any other 6922 in fact they were given a special ID code E88CC-01.
Happy hunting.