Preamp Deal of the Century

Stiltskin,
Last weekend for grins and giggles, I installed the factory supplied 5AR4 and 5881 regulators for a 6 hour listening session. As I've previously posted the Philips GZ34 and Westinghouse 6F6GT made a tremendous difference but until I tried the stock tubes again, I didn't realize the significance of the change. Have fun.

Whoopadeedoo, I appreciate your help and please continue posting your opinion in this thread, we need your constructive experience instead of some sterile fights.

Whoopadeedoo, in one of your prior posts I read about the Visseaux 6L6G or Mullard EL34 used as regulators. Now I´m using WE350B in my Cab. How you compare the 350B with any of those other tubes?.
My other tubes are Valvo GZ34 metal base, Sylvania 6SN7GT (1952) or Tung Sol 6SN7GT round plates and TJPx4/n or WE300B. Thanks

Jpms,
The Visseaux 6L6G (as with most 6L6 tubes in the regulator spot) are a lot more full and warm then the WE350B. The Visseaux 6L6GT (the straight bottle version) is not quite as warm as the 6L6G ST/coke bottle version. Having experiented more with the GT and G versions, I prefer the GT version because it sounds more controlled.

IMO, the 350B is an outstanding regulator for vocals. The mids and treble are on par or better then the other suitable 6L6-type tubes. The 350B has terrific spatial seperation and detail. However, I find it lacks full tonality. The bass is wonderfully tight but somewhat deficient in my system.

The Mullard EL37 is somewhere in between the 6L6 and 350B sound, and it is my preferred regulator tube at present time. It simply sounds the most balanced out of the group.

My head hurts...