Why would having a toroid and 2000 extra uF of capacitance make it sound any better?( My thoughts were more clean power and reserve should make for more headroom at higher volumes and in general a more dynamic sound overall. Torridal design is more efficient but takes up more space. I mean the Z9 has an extremely good preamp section, I am not saying they didn't improve upon it in the Z11 but I think you are splitting hairs that have already been split. Not to mention if you put it in Pure Direct Mode well all the processing goes out the window.