noise thru tube pre??

You did not mention the the tube manufacture and type you are using.

With the volume turned all the way down put your ear close to each speaker, do you hear a buzzing sound from either speaker or both...

I bought a new pair of New early 60s white label NOS Amperex PQ 7308 tubes a while back. After about 5 hours on the the tubes I noticed a buzzing sound in the right channel speaker, from my listening seat. I also noticed at a normal listening volume level, just a light tap on the top of the face plate of my Sonic Frontiers Line One preamp I could hear the tapping through the right speaker. Luckily I had bought the pair of tubes from a Tube Dealer and he sent me a new pair.

What tube damper are you using? I highly recommend the Herbie's HAL-O dampers. Below is a link.

http://herbiesaudiolab.home.att.net/

No I think you are confused. Tubes have a pleasant sounding noise. SS has a nasty sounding noise. There is a big difference....Wink.

C123666
>"This also shows the importance of a chassis designed to absorb resonances and not pass them to the tubes. Most units use folded sheet metal which is inadequate. Very few preamp manufacturers, except for the Very Expensive ones, use correct chassis"
>>>>>>>>>
I still have a Sonic Frontiers Preamp same as Chadnliz has now. The board the tube socket is mounted to is isolated very well. The build quality is very good.

As far as the preamp I am using now, Sonic Frontiers Line one, I can turn the gain control up quite high and tap on the preamp case with no microphonics what so ever from the tapping heard through the speakers.

Chadnliz. Your preamp sounds great with the Mullard tube I mentioned in one of your other threads. Nice warm tubey sound....

.
Jim