Rogue Cronus Magnum Tube Rolling

I had a wonderful experience several years ago, dealing directly with Mark
and Nick at Rogue Audio. With their guidance and thoughtful advice, I
swapped out all the tubes in my non-Magnum Cronus, and the sound of
music has been sublime. I replaced the original Svetlana EL-34's with a
beautiful matched quad of Genelex Gold Lion KT-77's.

The five small tubes were replaced as follows :
an RCA NOS 5814 to replace the EH 12AU7 gain stage tube, a pair of GE
NOS Five Star 5751 "goldpins" to replace the Sovtek 12AX7 input
tubes, and a pair of GE NOS 12AU7A's to replace the EH 12AU7 driver
tubes. Definite improvement !! I'm not sure how to describe it, other than
saying the music simply sounds better.

I also have 2 Mullard 12ax7's from Kevin in the Cronus. Very nice sound. The rich full sound of the Mullards seems to blend well with the 12au7's mentioned above. I bet you'll like them.

Adam, you can't go wrong with advice from Mark and Nick. What did that compliment of tube set you back? I may have to try that combo down the road.

Full complement of Mullards arrived today. Difference was immeadiate. Mids and highs blend beautifully. Very smooth yet still well defined. Extremely musical.Of course they are not broken in yet I've played a variety of music. Orchestral classical, great. Bill Evas at the Village Vanguard, piano, bass and drums all gorgeous.
Foo Fighters Sonic Highways on the table now, terrific. Even listened to an hour of iTunes. Noticeable improvement.

Thank you all. Will post again after some break in time.

Hi Bajead ..... $ 212 for the five small tubes, and $ 156 for the Gold Lion quad (both prices including shipping with secure bubble wrap and styrofoam packing.) To my ears, in my room, with my system, it was a very worthwhile investment. The new tubes brought the quality of my Cronus to a whole new level of refinement. Now that I'm thinking about it and actually sitting at my computer keyboard , I can describe the improvement as a more refined texture and tone, with more truthful musical timbre, tighter and deeper bass, an absolutely smooth liquid mid-range, and a sparkling non-fatiguing top end. A truly beautiful sound of music.

Bump Has anyone discovered any favorite NOS tubes
what positions are you rolling to greatest effect ? Does anyone now the tube complement in the Cronus Black?