Cary SLP-98L tube question

A line stage is a preamp without a phono stage. If you have a 98L which is a line stage there are just 4 tubes all 6SN7's.  If you only have two upgraded tubes try them in the front two positions then the back two and pick which sounds better.

"In the cathode follower you use the voltage swing across a resistor between ground and the cathode. This voltage swing will be roughly the same as the grid, but the current swing will be greater."  This gives a low impedance drive for the output (last) stage of a preamp. The two back tubes are likely cathode followers. No need to put upgraded tubes there! Use new tubes in the first (voltage gain) position.

Thank you.