Tube Rolling for Rogue Audio Cronus Magnum 2

@twoleftears The new production Gold Lions respond well to cryogenic treatment. I use GL 12AU7s in my line stage on an ongoing basis and replaced the stock Sovtek 5AR4 rectifier in my SACD player power supply with a Gold Lion GZ34. I always source my GL’s from Cryoset. Ron Sheldon’s tubes are quiet, neutral and seem to last forever...they just don’t get noisy.

One more tweak that really makes a difference is using Herbie’s Audio Labs tube dampers on ALL tubes. I just got an all titanium damper for my very hot running GZ34. It fits tight as can be and as crazy as it sounds all images since installing it are rock solid. Greater air to soundscape and improved dynamics!

hi! any recommendation for the center 12au7 cmiii ?.
I have these options at a near supply.

 

preamp spot on the cm sounds best with anything amperex or made by amperex.  mske sure it has been screened for low noise.  transparent, dynamic, clean, refined and colorful.  

i had the CM ii for several years and literally tried them all.  

12AU7 matched Mullards from Andy's Tube Services here.  I been meaning to call him and maybe try something new but the Mullards been sounding good for years.