I have been watching the debate about the gold pin EH tubes and Sovtek stock tubes and figured I would set the record straight The Gold pin tubes are a higher grade of the Sovtek. The gold pin tubes in general provide better connection in the tube socket and most people who have heard and tried both tubes have heard a different sound with the EH tubes.
As with all tube rolling some people will like one over the other as I have found in my 30 years of tube rolling. The Gold pins tubes are a higher quality tube and better selected tubes. hope this clears up some of the confusion. Most of the Russsian tubes under all different labels are manufactured by New Sensor in Russia.
I personally have used the Sovtek 6922,EH 6922 gold pin and the Genelex 6922 and all three sound very different with my favorite being the Genelex 6922 gold pins and they were twice the price of the Sovtek and all made in the same factory by the same company. I am also using Genelex 12Ax7 which are twice the cost of NOS 12XAX7 in one of my amps and love them as well.
Can you comment on how the Genelex 6922 Gold Pins differ sonically compared to the stock Sovtek and upgraded EH 6922 that Woo sells?
Also, I believe you may be the only other person currently with the WA7 and LCD-XC on hand. Do you find the WA7 overall a bright(er) amp? I have nothing to compare it against so I"m just curious as you have experience with many amps. I'm still hearing slight harshness in treble with the LCD-XC.
Last question may be very dumb. You mentioned the upgraded power supply will allow us to roll tubes. Would certain tubes be able to possibly "warm-up" the overall sound?
Sorry, soo many questions.