Speaker/Sub/Receiver settings question(s).

[GBMidge7]

Hello all. I have a few questions regarding the settings for my system. I just upgraded to two RTi A7s for my new fronts, with a CSi A6 on the way, and as a result I have gotten a little lost on setting up my system properly. At this point in time I have all my speakers set to "small", and my subwoofer crossover set to 80 Hz in the receiver setup menu, and as far as I can tell 80-100Hz crossover is pretty standard, yes? I have 3 questions, then...

1st, should the crossover on the sub itself be set to the same crossover point as in the receiver menu? At the moment I have it that way where it is set to 80Hz on the receiver and then 80Hz on the sub itself (My sub is a fairly weak Polk PSW10, and it only has settings for 80-160hz for the crossover... this will be the next replacement in the home theater!).

My second question is, is there any way to check/adjust the crossover points for my other speakers? Unless I am mistaken, I thought setting the speakers to "small" or "large" is what determines their crossover points.

Finally, and I know there is big debate on this issue, but is "small" most appropriate for my new fronts? The RTiA7s have two 6 inch bass drivers, but from what I have read, it is still best to leave them set to small.

Thanks in advance for the help, guys... can't wait to break in the new Polks.