Good Tube Selection for Atma Sphere S30?

Thank you. Great information

The Tung-Sol 6SN7GTB Reissues are considered to be among the best current production 6sn7s - you can get them for about $20 each.

Agree with several of your other posters. No need to change the 6AS7 output tubes. Play around with NOS 6SN7's in the first row first. To be honest I've noticed less of a difference with tube swapping in my S30 than most of my other amps. I'm not saying there is not a difference - it's just more subtle. Don't expect night and day difference. The S30 really does sound very nice out of the box.

Sibelius you are sooo right. The S30 does sound very nice out of the box. Thanks for the tip on the front row tubes. I understand now the critical tube locations to try. I had some microphonic feedback which was interrupted by tapping one of the front row tubes ever so lightly. I am going to keep GTBs or later in the back row. Nice to have an amp where you are not thinking in the back of your mind "it could be better if only the tubes were........."

Erfranke, what preamp are you using with your S-30?