atmasphere 6as7g output tubes.

That should have been: The output tubes would NOT really change the sound.

called Ralph at atmasphere again, he said that the output tubes would really change the sound. He recommended the Russian 6as7g output tubes. He also recommended turning the amps on stand by for 3 days as mentioned above, which can sometimes double the tube life.

So Sabi what brand tube did you purchase. Description of difference between nos and russian new stock, would be appreciated. Are nos 6as7g tubes possible noisy.

Just to throw my two cents in and since I started the thread: regarding input tubes , in my atmasphere ma 2 3.3 amps RCA 6sn7 input tubes sound the best to me. I also have a set of silvania 6sn7's. RCA's seem to add a great warmth and smooth vocals ( like wow vocals) , to me the silvania's sound thin in a bad way, sound stage is not as forward also. So there is no doubt that anyone would hear the differences in sound of different nos input tubes, so input tubes do make a real difference.

Even more inportant and able to modify the sound are the tubes in the mp1 preamp. Again I prefer RCA.

The one exception is in the 1st position in the amps I was lucky enough to find a pair of kenrad jan vt 231 black bottle, that are quiet and not microphonic, this one pair of tubes adds the necessary bass to round out my amps with either set of tubes.

ALSO ATMASPHERE EQUIPTMENT IS AWSOME!!