Excellent write up 30yrVetera. You make this seem so easy. I think I'm going to try this myself but use just one sub woofer instead of two. I like the sound now but sometimes can use a little more deep bass at times. Thanks for sharing this

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2008 650 Convertible- 6 Speed manual- Sport package- HUD- Lane Departure- Comfort Access- Merino Leather- HD Radio- SAT