best tubes for VTL,5.5 preamp.

I am currently using New Sensor Mullard 12AX7 in the line stage of my 5.5. These are nice and warm sounding. The New Sensor Tung Sol 12AX7 sounded good as well. These are my favorite new production 12AX7s. If you want to go NOS I really loved the American Tung Sol 12AX7s. The midrange was nice and warm and they had good weight and articulation in the Low end and a nice sparkle on the top. I also liked RCA grey plate 12AX7s.

Does your 5.5 use 12AT7 in the Line stage? If so I would recomend Sylvania 6201 Gold Brand or Mullard CV4024.

I have a ver.1 5.5 that uses 6350 and the only ones of those I have tried are Sylvania.

Cheers,
Jim

After trying several NOS tubes, I find the Amperex Bugleboy 12AX7 and Telefunken/Mullard 12AT7 tubes the best combination. Try it.

Cheers.
chidambg

Hello -
Probably a stupid questiond
How can you tell what Version the 5.5 is and what the actual changes were? The VTL website does not seem to have that information and VTL has not responded to my question as of yet.
The unit # does not change( i.e. how ARC does with MKII or giong from say a LS16 MKII to an LS17).
Just curious because I will be looking to upgrade from my quicksilver in a few months and the 5.5 is on the short list.

Thanks in advance.

I have the MKII and it has the plastic remote instead of the metal one. Don't know when the switch was made, but I don't think any the of MKI had plastic remotes. So, if your remote is plastic, it should be an MKII. If metal you may have to call VTL with the s/n.
Jeff