noise thru tube pre??

Microphonic tubes. Nothing to really be concerned about.

Not a problem if your pre still sounds good. Microphonic tubes can actually sound very good, but it is system dependent.

Probably time to tube roll anyway since you just got your new pre. Experiment and have fun. You will be amazed at the difference tubes can make.

Newbee, tubes with some microphonics (if not ridiculous) can add a sense of realism to the soundstage. They can add a slight hall or venue presence that has nothing to do with "glare, grit, grain, etc." Unless the tube is overly microphonic some of the best sounding tubes I have ever had in my system have been slightly microphonic. And speaking of "distortion", that's inherent with tubes and is the very reason many of us prefer the sound of tubes to SS to begin with :)

Newbee, the only thing I disagreed with in your first post was the implication that microphonic tubes somehow always sound bad.

Enjoying the effect of a slightly microphonic tube is no different than rolling a Mullard for warmth or a Telefunken for detail. Every tube adds its own particular "signal enhancement". None of them comes with an accuracy meter.

I won't deny that microphonics aren't accurate. But like warm Mullards or super transparent CCAs, every tube adds it's sonic signature one way or another.

I think you hit the nail on the head when you said, "Thats strictly my choice. Others can tune their system as they wish."

That's the real joy of tubes versus solid state, IMHO. Tubes offer so many options for one to tailor the sound of their system until they find the "accuracy" that sounds right to them.

LOL, good point Honest1.