When I played pro guitar 12" speakers in my fnder amp were great. I listened to 2 fender guitar amps, one with 2 ten inch speakers and another with 4 ten inch speakers. They were different than my 12's -- I liked what I heard.

Just recently a friend and I listen to 2 different keyboards -- our opinions were very different about the same keyboards --OK, we all hear different, I accept.

For me, my JBL powered 10's give me one great sound. Add a sub for bigger jobs and it becomes fantastic. When I put the speakers on stands I hear things from my keyboard, both KN7 and the Tyros I normally do not hear. As for the sound of my voice, it gets stronger, clearer and out in front.

I am very interested in the Z5500, wow, so many great reports.
IMHO, John C.