http://www.rollaclub.com/board/?showtopic=25373
why post twice?
didnt you get the answer over there?
low pass: used for bass duties - sub - 20Hz-200-300Hz
high pass: used for running og high frequenzy - Tweeters - 200Hz and up
full pass: for running coaxial speaker - 4"-6x9" - run all hertz ranges needed
amps are for anything speaker wise....
different filter do different things....
running your sub full range is a bad thing....
i had a 10" running full and half the nominal power and cooked it within an hour....
i install for a living and you never do it, no matter what....
and don't bridge channels on your head unit because it brings down the impedence, ie: ohm loading
subs are usaully 4 ohms and lower and your standard speaker in usually 8 or 4 dependin on the quality....
deck rca are a 4v signal that the amp processes into sound....
anything else you need to know send me a pm!