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 - - Technical and System Design
 - - - Need Help With System Crossover Point Design

I am setting up a system and need help with ideas on what crossover points to use on which speakers. Here's what I have - let me know what range of signal I should send to each speaker set. I don't have a choice on the dash speakers - thats what's left of the factory stuff I have to leave in the config. Dash. Three 3" speakers. 0-18k, 20k-25k. (don't ask me why they did this, I would have no way of finding out) Doors. 6.5" Alpine Type R components with 1" dome tweeters mounted next to them. What range of signal to send to them? Rear Deck. Two Alpine Type R 6x9 coaxials. What range of signal to send to them? Trunk. Sub box with one Alpine Type R 10" sub. Currently getting 100hz and below. What range to send to it? Thanks guys.