Where does a guy start?

[BIGglaSS]

John, there is no 'perfect' solution. Mid and high range speakers are designed to be aimed within about 30 degrees of the listener. So, that rules out under the seat. A center speaker does not have stereo separation. I chose to use the vents for installation in my 57. It was a last resort decision because I wanted to keep the system stealth.

Under seat subwoofers lack authority, but may be OK if you're only looking to fill in a missing frequency.

I agree to not cut doors for speakers. Worse case scenario, if you want to hide everything, use 2 speakers in the center grill. Other wise, some kind of dash or kick panel pods are a must have for good quality sound.

Putting mid and high range speakers under the seat or the rear corners will never sound like the recording is intended. You would never go to a concert and turn your back the the stage, right? But as a last resort, a lot of guys do that, and are happy with it...