Quote:
Originally Posted by 2016 4Runner SR5
Installing a 3.5" 2 way speaker in place of the tweeter fills in the frequency gap between the 6x9 in the door and the tweeter in the dash. More full and clean sound.
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Also, replacing the stock 3.5 inch full-range dash speakers, crappy as they are, with 1 inch or smaller tweeters will cause much of the mid-range sound to be lost, like vocals, guitar solos, etc.