Yes, I’m running Roger Sander’s Magtech amps with my Ultimate 845’s and they sound great, although I would like to get a little more tube type juiciness into the sound.
I have now incorporated four subs in with my SL and that is working quite well. Having the subs take on 100hz and lower has freed up the power requirements of the panel, thus allowing me to consider some “lower” powered amps/tube amps. So, I’m working on that now, but the Sanders amps perform very well.