I own 936s which I use Aragon monoblocs with at 400wpc, not the best high powered amps I ever heard but even though 400wpc high current may seem like complete overkil I can tell you the 936s with the bigger double woofers despite rated at 8 ohms have a nast drop to what I assume and my Buddy Trelja wo has heard them repeatedly ,that there is a drop to something below 4 ohms when playing bass heavy music. Therefore head room is important if you use tubes on your smaller 92? newer model 926, I would very seriously recommend some overkill that is get really powerful tube amps at least 100wpc. By the way they struggle with tubes because they still have ohm drop and then the mids and treble that present a difficult load. Believe me I have tried my low watt tube amp(s) with them, Not a pretty picture. Seriously think either classD which I don't love or a well condition pure Class A SS. I have heard them with BAT 150se amps their best pre etc at HES and they were beautiful but you need serious bucks for that set up! Power my Man honestly. Tubes are going to be real hard.