Yes, it's a Tor Balanced. I've not yet tried it with the Atrium yet. I'm enjoying the Atrium on solid state first to really absorb its sound signature before I move on to tubes. Trying to savour the journey.
I'm sure you'll enjoy the Tor with the Atrium
I had my Tor Balanced for a few weeks with the Atrium and it was excellent with RCA VT231 Smoke Glasses - awesome staging, very euphonic and incredible imaging and vocals. The RCAs run warm though and the Tor inherently does so too a little, but it is also extremely responsive, so wish I had the chance to try some more neutral tubes with it.
Only reason I moved on from it is I came across a good deal on a Euforia AE, but the Tor very much outperforms its own price point, is very responsive to tube rolls (compared with stock on my end, others have mentioned the same responsiveness), is very compact, and is a looker as well.