Tony, I can speak to some of the equipment, since I had my own sound system set up in our family room and the other guys tied into that.

I have a Peavey Unity Series 1000 8-channel mixer driving a Carvin Model FET 450 Power Amp. (225 watts per channel into 4 ohms)
The stand mounted speakers were Peavey Model
358-5 three way's with 15 inch LF speakers.

I use a Shure Model PE 56D mic.

Scott ran his Tyros directly into my mixer, with his EV mic feeding into the Tyros.

Eric ran his 9000 Pro and two mics into his Mackie mixer and from there through my mixer.

I'll let Scott and Eric comment on details of their equipment beyond this.
Paul C.