I had driven Raal Sr1a with Jot R ss amp with exciting result but sometimes it got too close to hot.
Thus I had tried Schitt Freya(only 900$ but way better than its price) in front of Jot R with satisfaction.
It makes sr1a sound relaxed and musical.
Schitt give 15 day’s return.
Stock 6sn7 tube does sound decent, but if you like the sound of Freya then you may try some Nos tubes(Sylvania GTB or RCA gray bottle around 100$ pair or Kenrad vt 231 at 200$ pair)
Kenrad vt231 sounds sweet with excellent bass.
You may refer to the following thread on general reputation of 6sn7 tubes.
6SN7 VT
The Reference 6SN7 Thread
Thus I had tried Schitt Freya(only 900$ but way better than its price) in front of Jot R with satisfaction.
It makes sr1a sound relaxed and musical.
Schitt give 15 day’s return.
Stock 6sn7 tube does sound decent, but if you like the sound of Freya then you may try some Nos tubes(Sylvania GTB or RCA gray bottle around 100$ pair or Kenrad vt 231 at 200$ pair)
Kenrad vt231 sounds sweet with excellent bass.
You may refer to the following thread on general reputation of 6sn7 tubes.
6SN7 VT
The Reference 6SN7 Thread