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What would happen if I replace the stock 6x9 in the front with my infinity 2 ways 6x9's that I had in my old Xterra and keep the tweeters in dash?
Should work just fine but your 6x9s won't have any high frequency sound comming out of them effectively making them a one way speaker. Thats because the factory crossover will filter out all the high frequency sound out and send it to your factory dash tweeters.