My 4x10 speakers are blown in the rear deck. I was looking at Crutchfield.com for new ones and when I put in a 1987 Buick Grand National as my car, it shows both 4x10 and 6x9 for the rear deck. Do 6x9 speakers fit back there with no modification? I was looking on Crutchfield because no one around here stocks 4x10 speakers .. it's all 6x9 or more modern sizes.
rear deck speakers
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