3 way plus sub?
 

I have an alpine 9855, mrvF-405,mrv-f540,mrd-m500, how would you setup for most adjustability for active 3-way plus sub?
was going to bridge the 405 on midbass, use the 540 for mid and tweet.....
tw on hi out, mid on low out, midbass and sub on sub out?then I can t/a tw,mid and midbass on the deck and the sub thru the mrdm500.....??? I also have a remote level control for the sub, or should I look for an amp link cable?

front and rear rcá's to run your tweets, midrange and midbass, sub rca out to run your sub

you'll need an active crossover of some sort imo