Info on Matrix UKP1000 and 2U1500

most amps will tell you what power they will put out per channel into an 8 ohm load, and also a 4 ohm load. and maybe even a 2 ohm load.

in the ase of the xt5000mf, it will put out 1800w per channel into an 8 ohm speaker, and 2400w into 4 ohms

impedence (which is measured in ohms) is an electrical characteristic of speakers. linking 2 8 ohm speakers in parallel makes the resistance of the pair together drop to 4 ohms. so one 8 ohm speaker connected to one channel of that amp will get 1800w. 2 x 8 ohm speakers linked in parallel and connected to an amp channel of that amp will get a total of 2400w or 1200w each speaker. simplified a lot...

the yamaha is a smaller amp in every way.

i don't really understand "eminence 18" 800w ordinary ( 15 "x 2 eminence 400w - 500w ) x1 T&M 12" 600w ordinary".

please be a bit clearer about how many of what speakers you have.