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Conrad-Johnson PV 11 preamp tube dilemma

I recently made changes to my system that altered the character of the sound.  After installing Morrow MA4 interconnects between preamp and DAC, and preamp and amplifier, the sound became duller.  By switching from two 12AU7 Telefunken tubes to Amperex tubes in the line section of the preamp, CDs started sounding wonderful. The problem is the phono section still sounds very dull.
In the tube section I’m currently using two Electro Harmonix 12AX7’s, one JJ-5751 tube and one Mullard 12AU7.
Can anyone suggest a tube complement that would brighten the sound of the phono section?
rvpiano

Showing 3 responses by uberwaltz

uberwaltz's avatar
uberwaltz
13,381 posts
 
Just from my experience no matter what pieces I have in my system the only cable brand I have tried and that I hear consistent improvement with every tier I move up is Nordost.

I know a lot consider them to be very overpriced, flat, hollow sounding but just for me they have consistently worked.
uberwaltz's avatar
uberwaltz
13,381 posts
 
Got you OP.

I hate when an "upgrade" turns into a downgrade!
Its times like that you wish you could just be content to leave well alone. Which is not likely to happen to any of us anytime soon.....lol.
uberwaltz's avatar
uberwaltz
13,381 posts
 
I guess I have to ask the obvious but if changing to the morrow ic caused such a dissapointed sound result that you felt you needed to start tube rolling might it not have been better to just have put the original ic back in the system?

Or were you changing ic because you disliked the sq anyway?
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