It sounds like that is your best bet. Besides, you can always save money and then put a small amp via your low level outputs onto your plates and then run the tweeters off of the high level output of the radio. Just put a small crossover or even the bass blockers onto the tweeter. Good luck.
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 2003 Maroon Alero GLS Sedan. (Purchased new in 2003 with 18 miles, and sold in 2006)
2004 Toyota Corolla LE (Purchased new in 2003 with 87 original miles)
2007 Toyota Camry LE (12 original miles)
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