The Eclipse might have a powered center speaker channel. If you tie into the stock unit without the center channel output, it will throw you sound staging off. Look into the Eclipse speaker outputs and you might be able to do it then.

Also, I thought all three dash speaker cutouts were for 3.5" speakers. You may have to cut a little to get the 4" in there.

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2007 SR5 Crewmax 5.7L 4x4
Mods: nerf bars, Truxedo tonneau, radar detector power, fog lights, black billet grille, rear differential breather, parking sensors, Line-X, power tailgate lock, hood safety latch mod, one off driving lights behind grille, Pioneer NAV w/ OEM camera, Flowmaster 50 SUV dual/dual, blue LED dash lights, Volant CAI
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