Sorry, I was away. I'm using a YBA 2 pre/power. I have a SOTA Stsr/ SME V Grado Master. I use a Mac Mini Wavelength Coscecant Dac for digital. The room is much larger 12x 26 but the listening area is only 12 x 8. The speakers are on the long wall 2 feet in and the listening position is 6 feet from the speakers. Tapestry on wall behind the listening position. Can't listen loud NYC co-op. I'm happy with the speakers in general the question was about trying tubes over my SS YBA stuff for a change not changing speaker or room treatments that will have me living in Central Park after my wife throws me out.