Leben cs 600 preamplifier tubes


I have always wondered if there are any audible differences with the various 6CS7 preamplifier tubes.  My cs 600 was stocked with GE NOS 6CS7,  I have seen occasional quads of Sylvania, RCA and most recently Tungsol tubes.  I realize these tubes are scarce and as a result, tube rolling may not be feasible.

Nonetheless I wonder if anyone has had the good fortune to roll these quads and determine any sonic advantages of one vs the other.

May peace return to our universe.

rivinyl

Yes, I owned a 600 several years ago when the 6CS7 was more readily available. I found slight differences in tone and soundstage, but you really need to have your system placed well and dialed in to make it worthwhile. I liked the RCA best.

I was told by the  owner of Leben that the old 600 could be altered to use 12AX7's (by a tech) but the US importer says it can't be done.