Todd, try fading the front speakers over to either the left or right. If the bass and volume drastically improve, you have wired the front speakers out of phase. The fix is as simple as making sure LF+ and LF- are correctly wired to the + and - posts of the left front speaker. Same goes for the right.
Since your post is almost a month old now, I'm curious what you found out.
Since your post is almost a month old now, I'm curious what you found out.