In my opinion,I had the 3.5 speakers in the dash of my Cougar and I think they blow. I even put in some sonys but just made clear sounding speakers that blow
better off just running new wires to the doors and installing 6 1/2 pioneers or some other good brand.
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Rob meister
89 Mercedes 190E 2.6
87 Lincoln Continental
Ex 86 Mercury Cougar