The drawing looks like the subs are in serial. That will give two 4 ohm subs a 8 ohm load. You want to wire it in parallel to give it a 2 ohm. It is pretty simple. Just wire the amp positive to both sub positives. The amp negative to both sub negatives. If you are unsure, here is JL's tutorial. It is a life savor for installs. http://mobile.jlaudio.com/support_pages.php?page_id=160
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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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