Front Doors Are 6 3/4" Speakers
Rear Deck Are 6X9" Speakers
Front Tweeters Are 3 1/2"
Center Is 3 1/2" Speaker
Polk Audio db571 or Infinity Reference 6822cf
5x7 or 6x8 fit.
no it will not, most major parts are not compatible as the qx4 has a different 4wd system.
6.5"x3.5"deep for the door speakers 4x10"x2"deep for the rear speakers Sized from Infinity Vehicle Fit Guide
5 by 7"s
4x6 in front 6x9 in back
You will either need factory Infinity replacements since the speakers have their own attached amps. Or....replace the entire system with an aftermarket setup. You can go to Crutchfield.com to find out what size speakers will fit your car. Another option (this is what I myself did) for the fronts I used 6 1/2s and zip-tied the amps to them. This works for me but it is more trouble than its worth and doesn't sound very good. Note: not all 6 1/2 will work (in fact I believe most wont.)
1996 through 1999 Chevrolet Tahoes normally have 6 1/2" speakers for the rear. edit: Forgot to say, these are shallow mount speakers! So if you are replacing them, do not get woofers or larger-cone speakers as they will not fit.
Best Buy and Crutchfield will let you know which speakers will fit in your car. For example Infinity 6x8's will fit in the rear deck of your Taurus.
google caraudio and find a website that shows fit of your car
Should be 6.5" in the front doors, and 6.5" on the rear deck.
I replaced the front door speakers in my 99 Concorde because they had blown. They are 6 1/2". I bought mine from best buy.