What is your favorite tube for a preamplifier ?

Hi 2 channel

I recently got a cyber 222 and am enjoying it very much. I also replaced the 5AR4 with a mullard and replaced the 6SN7 s with NOS tubes but not all the same. Each one different in fact as I read that a combination of them can sound good.
My pre was modified by parts conexion so is not stock. Was wondering how you changed the power cord ? Is that the one between the power supply and the pre ? Would like to hear your thoughts on the volume control too . I found there was not enough range between (4)and (5) so have tried some inline attenuators . They help but I think they have taken the highs away unfortunately. Be good to hear your thoughts.

The 7193 (2C22) is the king of preamp tubs in my opinion. I converted my Supratek preamp to use these instead of 6SN7s; much crisper and clearer treble, with images that hover in the room with you.

The 7193 (2C22) is the king of preamp tubes in my opinion. I converted my Supratek preamp to use these instead of 6SN7s; much crisper and clearer treble, with images that hover in the room with you.

I have used many the 6sn7 or 6sl7 are more bloomy not quite as accurate though the build of the preamp and coupling capacitors have a lot to say about the final sound also I use the 6h30 supertube in the special dD grade and I get plenty of soundstage quickness and musicality .I have the new Lector 0ohm preamp ,the beauty hear is that you have 4 choices on what kind of tubes you want to roll also please remember a good tube damper such as the Herbies he has several grades and a good power cord
and I strongly recommend using the better Silver fuses on all your gear your detail is clearly better if you gear is respectable.

6SN7s are nice as they have a low microphonic aspect. They are great in line stages and can handle a lot of current so wide bandwidth is easy. Although they have less gain than 6DJ8/6922s or 6H30s, the reduced microphonics compared to those tubes is profound- so it is easier to make a line section that is neutral with the 6SN7. Of course you can hand-pick the miniature tubes for low microphonics, but in doing the same for the 6SN7s the same advantage of the 6SN7 is realized.