Also note that the Freya allows 3 settings…passive, FET, and tube, so you can see what's what regarding the tube vs SS sound you like from the comfort of your listening seat. The tube setting is MUCH louder than the other two so surprises and hammering on the walls by neighbors can result from not adjusting the levels when switching around. I prefer the tube setting on this preamp, but I do switch it around to see if tube "coloring" is creeping in to harmonically grease the proceedings, but so far no problemo, and the only issue is compulsive spending on interesting 6SN7GTB tube options…chrome domes for days!