vintage '50s 12AX7: Mullard, Amperex BB, Brimar

Would appreciate general characterizations of sound character compare/contrast of these tubes in a preamp. Thanks!

-dan

dgaylin06-05-2010 8:20pm

mofimadness Details Discussions Posts This discussion Message User 4,152 posts 06-06-2010 at 12:29am Copy Comment URL Report Comment Edit Delete I really like the Mullard CV4004's. Indeed, all of this is personal preference and what tube works best in that piece of gear's circuit design. http://www.upscaleaudio.com/Mullard-CV4004_p_5.html
dgaylin OP Details Discussions Posts This discussion Message User 250 posts 06-06-2010 at 01:48am Copy Comment URL Report Comment Edit Delete Theses are very helpful. Much appreciated.
viridian Details Discussions Posts This discussion Message User 4,184 posts 06-06-2010 at 04:43pm Copy Comment URL Report Comment Edit Delete I have never tried the Brimars, but have various iterations of the Mullard and Amperex 12AX7. I am currently enjoying a pair of RCA 7058, which is a ruggedized 12AX7 variant designed for automotive use! The heaters are set up a bit differently, with pin 9 to ground, so they will not work in all circuits. The sound is very dynamic and quite smooth, with a nice balance of detail and drive.