i am sorry u got me confused there LOL

i am new to forums and i still havent learned some things
1. is it yes the 540R will drive the ikons7 as efficicently as with the Ikons6 or yes the the Ikons6 are more suitable for such a "small amp"?
2. is the 640c a better unit or is it better if i match the 540C with my 540R?
thanks
P.S. sorry for being a pain in the...