tweeters

umm ok? so waht r u guys telling me to do

Whoa look at all these posts and no one is telling wrathchild *why* what he's trying to do is going to sound so bad.

wrathchild, when you start adding speakers in the manner you are talking about, you wind up not adding sound, but in many cases canceling what you have out and muddying up what is left.  I couldn't imagine how your setup would sound but it is sounding so incredibly bizarre that I'm having a little trouble just imagining how you came up with this setup.

Think of dropping two stones in the water.  Ya know how the waves will hit each other and disappate each other? That is kinda what happens when you start adding speakers around a car in the manner you are talking about.  That is why we are telling you it is such a bad idea.  Lotsa buzz-words and heady sound-philosophy here.. but the fundemental idea here is that more really isn't better.

Ya know how if you drop two stones in the water, but you hold them close together, and they make one big splash?  That is why Poormanq45 is telling you, if you are dead set on doing something this goofy, do it with an extra componet set, not 4x4"... if you mount one in a kickpod and the other in the front door, *close* together, you get much less of that cancelation effect... and you'll be closer to your goal of more sound that you'll ever get with your 4x4 plan. 

Not only that, wiring a midbass in parallel with a tweeter b/c thats the only way it'll work, especially given all the other equipment you have, is completely retarded.  I can't even address the ridiculousness of such a proposition without my head almost hurting.

You say "come on guys, ppl with 8 12 don't just have 4 really nice speakers" .. I don't really know how else to tell you this, but usually ppl don't have 8 12's at all.  I really don't know if you'd even be able to design a high end that would be able to keep up with that sort of pressure.  What kinda of vehicle is this behemoth system in?

Poormanq45 is right, if you want to do this the way you want, you need new mains.  A 3-way setup with lotsa cone area.. bridge the entirty of that 50x4 to them and run your 6x9's in the rear.. 6x9's have lotsa cone area anyway, that is ur best choice there.  Add an extra set of tweeters in your A-pillars..  but that'd be about it.

It'd be loud anyway.

Huh. I got so wrapped up in why that is such a bad plan I never actually answered the question.

I don't really want to.

You'd want to run your tweeters off of one pair of channels, and  the 4" speakers, wired together in parallel, with the other.  That way the same size speakers would be getting the same signal.  That is kinda important.

Of course, getting a signal that would do that properly is kinda another story.  Ya need a signal processor for something like that..

Wrathchild:  what you're planning on doing simply will not sound good.  If all you want is loud, by all means, go nuts with speakers.  Stop asking us if it will sound good.  It won't. 

If you want your system to sound good focus on ONE driver per channel handling any given frequency range.  (e.g., one left tweeter plays the left highs, one left midrange playing the left mids, one left midbass playing the left midbass, etc.).  If you want loud focus on a mix of efficiency and power handling.  Spend good time and money on the installation.  Expect to drop a lot of money if you want high spl capability and good sound quality. 

Sedate correctly mentioned cancellation as the main reason for not trying what you are contemplating.  Other reasons include phase problems, timing issues, and tonal differences related to differing driver materials and capabilities. 

Look.  If you want loud sound that many would say sounds horrible, go with your plan.  If you want to learn how to do it right, start researching (a) some of the concepts mentioned above (b) speakers and amplifiers that will help you acheive your goal. 

Here's an option if you really want very loud while retaining sound quality.

Horn from ID:   https://www.cardomain.com/item/IDSCD2COMP
Buy 2 midbass drivers per side to be wired in parallel. 
Actively cross over.
EQ.