Schiit Freya+(Plus)

Another +1 for the Freya+. Mine is the original (with the tubes), I've had it for a few years, it gets pretty warm, it sounds wonderful run thru the tubes, I've had no bad surprises. I love it. 
Sorry to hear some owner's experiences aren't as good.

Forgot to ask: how many Freya rollers are using different 6SN7s for gain and buffer stages? For those doing so, does it matter, and how so?

I've have the original Freya for about a year and a half now and love the sound of tubes. This is my first tube preamp and I've had an issue that started about 9 months of using it. I have a noticeable pop in the left channel when I turn the volume up to about what I consider the 9oclock position. Believe me I tried switching every cable tube (left-right, right- left) and it still happens still occurs. Now to let you know when I switch L-R, R-L the pop comes out of the right channel. I sent it in to 
Freya and got it back telling me they could not simulate the problem. Got it back and it was ok for about a week and a half. I by no means don't like this pre or Schiit I will have to live with it because Im not going to pay any more shipping. This is not a rant, but maybe someone has an idea.

Do you mean when you switch the interconnect cables the pop switches sides?If so it's a loose connection in the cable.

I will try different cables, but I believe I tried that but I tried so many things now I'm not sure.