Primaluna dialogue premium HP tube rolling suggestions to reduce brightness

George HiFi-  since you seem to have a better understanding to the technical concepts, perhaps you can explain this to me. The amp has output terminals for 4, 8 and 16 ohms.  While my proacs are 8 ohm, when I run them using the 4 ohm terminals, they sound better - bigger soundstage, more air around the instruments.  If it matters in the equation, my set up requires me to run about 4 meters of speaker cable (I cant place the amp next to the speakers)- which I am using Kimber 8TC bi-wired.

Everyone Else - I have reached out to Kevin at Upscale about the V11&12 tubes and will see what he recommends. I will check out aniwolfe's source, too.  When you say the re-issue Mullards- are these the Russian made tubes? 

aniwolfe- I prefer the ultralinear mode, too, primarily because the soundstage is much bigger, which is why mini-monitors and EL34s have been at the heart of my systems for decades.  What else is in your system, if I may ask?

avanti1960-

Dark, as opposed to bright, or dark as in heavy and not light and airy?  Who/where is the source for the JJs?

Upscale audio offers a cryogenic treatment.  Any comments on how it will affect sound?

Aolmrd1241- I hear you.  Thinking changing tubes are an easy and inexpensive first step, with a limited number of possibilities.   I have not ruled out the naim as something to think about next.

I just ordered the British mullard 12au7/cv4003 from upscale, a matched pair for the v11-12 positions.  I thank you for all of your comments, and I'll let you know how things turn out after a have had some time for serious listening.  

I am am going to open a new string on cryo treatment (later today) , as that has me curious.  Jared at upscale said the cryo makes the tubes break in faster, so for 8 bucks I went ahead with it.

THANKS,

Bill