What Corey has there are sealed enclosures. Makes for a tighter bass, cleaner sound, but as you know, not as loud.
As long as the volume inside the box is correct, should sound very nice!

1986 Pickup extracab longbed "Woody edition"
SAS - 33's, 5.29's, lockright rear.

02 IS300 SportCross - my "DD"
94 2wd v6 extracab
04 Outback Wagon- wife's/family car