@charles1dad Only as power amp with CSL. Using passive/volume control on 845 substantially inferior to CSL, even inferior to my relatively cheapo Schitt Saga+ passive. I see integrated feature as add on, temp solution for those without pre.
. I'd bet the 845 would be very nice match with all Coincident speakers, plenty of drive along with the SET magic. 845 not quite the magic of 300B tube, but authority, impact, drive and enough of the 300B magic to be quite enticing. The 845 preferable to my 300B amps with my Merlin VSM MM 91db sens., easy impedance curve. 300B preferable with my 104db sens. Klipschorns.