Bought a pair of Siemens CCa tubes and got them in today. Using them on the Torii MK V for the front 2 input tubes. Man! Kick ass tubes. Great balance on the lows/mids/highs. Oodles of detail from lows, mids, and highs.
Think I’ve found my best tube for the 6922.
Images are photos from the listing and not my own but here they are:
https://imgur.com/a/nye1IpX