Denon AVR-789 + Klipsch F1 5.1

Hey all, this is my first post i am a virgin yes , just bought the Denon and Klipsch 5.1 package with sub.

klipsch.com/products/details/f-1-home-theater-system.aspx
klipsch.com/products/details/synergy-sub-10.aspx


Just a few questions =)


1. With the sub there's 2 knobs GAIN and LOWPASS in Hz, what should i set them to? minimum or maximum setting?


2. The F1 says 100watts but the Denon says 90watts per channel, does the wattage matter?


3. If anyone has the same kind of setup please share your settings =)


Any help will be awesome