Question about stereo instalation
 

Hi guys!
I plan to upgrade my sound systeme and i have a few question for you

My blazer is a 99 LT 4dr with 6.5" speaker in all 4 doors and 2 tweeter in the dashboard... Everything oem.

Setup would be :

(4) Door speaker 6 1/2 Alpine SPS-610

(2) Dash speaker 4x6 Alpine SPS-406

HeadUnit Alpine CDE-143BT

Without amp and sub (planned for later)

I'd use oem wiring, cut the wire right before oem speaker and use push-on connectors, my question is about the 2 dashboard 4x6 instead of the tweeters... Can i put these there without other wiring modification?

Also i have a problem with my left rear door speaker, someday he is working someday he is not...
I check wire at headunit harness and in the door evrything look fine
Is it possible that the delco headunit cause that?

Thanks for your help guys!

Yes.

could be a bad speaker, or head unit or wiring....my guess is speaker though
I would switch it out and see how it goes.

I believe in the dash you will have to remove the bass blocker that is wired in line with the tweeter.

Is this the bass blocker?

http://i58.servimg.com/u/f58/16/04/12/87/image10.jpg


Also what do you guys think of my speaker/headunit choice? And wich amp/sub should i use with those?

I choosed these speaker cause i got the 2 4x6 for free so..

Thanks!!

O, Really?
Sorry for wrong advice op
Thanks for correcting me Rich

Edit: alpine makes great stuff op, I'm sure you'll like it.