3 way passive

I'm putting together a 3-way component set of my own and need help building a pair of 3-way passive crossovers. Component selection, where to find, and other helpful info. These will be used in each door of my Astro. Here is what I have: Power is 150 watts RMS per channel. Mid-Bass will be (1) RE Audio REX12D4 Midrange will be (1) RE Audio REX8D4 Highpass will be (2) RE Audio TW1

What is the impedance of each driver?  What crossover points do you want.  On the midrange, we need the low and high pass frequencies. 

And why in the world are you planning to use two tweeters per side?

Go to the parts express website.  Plenty of tutorials there and a good selection of parts.  But know this: building a crossover is far more difficult than just plugging in some numbers and soldering together some components.  If you want it to sound good, that is.

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DYohn wrote: And why in the world are you planning to use two tweeters per side?

That poor choice not withstanding... but a 12" subwoofer as a mid-bass, and an 8" subwoofer as a mid-range? <shudder> My ears are bleeding to even THINK about hearing that. No matter WHAT you do, if you try to use ANY kind of "regular" or "common" crossover points, using those drivers, it's GONNA (not might. Oh, no, my friend... it WILL) sound like arse. You can't go low enough with the tweeters to meet the 8" top response, NOR can you go high enough with an 8" woofer to meet the low frequency end of ANY tweeter, let alone a car-audio tweeter! You have chosen incorrectly and unwisely, young padawan. Reassess your goals, and THEN we'll help, but you will not achieve any good results with your chosen driver compliment. You won't get them.It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

A 12" in the door? Really? I gotta see this...

12's in the doors is done more often than you think. And I chose 10's and a 6.5" Component set. The 10's I'm running off the rear channels of the mids and highs amp. Running the amp in full range.

Look up Speaker Workshop and use that utility to help put drivers and crossover components together.  Warning, though, experimenting with building passives can become an expensive hobby.Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Where are the pictures?

^^ Nice. If he did this on a trike it'd roll pretty well. :)