John ,

I have experimented at length on this subject. Both with different recievers and speakers . Certainly use the guides that come with your eqiupment, but as it says only use this as a guide and a starting point only.
The previous guy,s have given you some useful information. By far the best way is to experiment and reading as much as you can on the subject.
I have found that the best help is a SPL meter as already suggested . You must purchase one. Go to Radio Shack, they,re not expensive maybe around $25 or so.

Make your purchase, tweek your system and enjoy.

Need any more help just ask
Kev