So a Big Thank you to Andy for bringing to light the 1T4 Brimars.
I have now around twenty hours on them and they are wonderful. They opened up quite a bit over the twenty hours and now to my ears combine the airy top end of the Lorenz/Siemens, bass, in fact a little more bass than the Mullards and the sweet mid's of the Mazda's.
They seem to do all things exceptionally well. I did some swapping back and forth tonight and they now are my go to 1T4 as when I put the Lorenz, Mazda or Mullard's back in the overall sonic lacked dimension and intimacy as well as speed and depth. They are a perfect combination with the Phillips DL92 I feel.
These are very detailed tubes as well. Guitars have an added layer of texture as do strings. Brushes on skin have just that little more texture and grain. In comparison the other three feel ever so slightly veiled in that respect ( and this is extreme nit picking it has to be said. All three tubes are still wonderful tubes and if I was told I could only live with one of them I would still be happy)
Just lovely lovely tubes. My other set of Brimars came no where near this standard!