Best mellow sounding 12ax7 for Thor TA-1000 preamp


I just bought  Thor TA-1000 and am very impressed with the resolution but want it to be more mellow sounding... Darker and less treble emphasis. Can anyone recommend the most musical but mellow/organic 12ax7 for the Thor? When I bought it the unit has telefunkens. The outputs are already mullards so I am focused on the inputs.

It is feeding vtl mb-185 signature amps and quad esl63 with vandersteen 2wq subs.

Thanks!
montaldo

Showing 1 response by smfins

Hi, i just happened to stumble across this thread. I recently aquired a Thor TA-1000 mkii preamp. (at least i think it's a Mkii) The serial number is greater than 1000, and I read that if that's the case then it's a mkii?? Is there anywhere i can get an owners manual for it, and  If not does anyone here have one that they could make a copy for me? I would be willing to pay for your time and of course the mailing cost. One of the questions I have is what is the toggle switch on the back for? it isn't labeled. thanks for any help!