I find it impossible to fit 15+ cubes in a trunk of an Impala.
I know someone with an impala that has 2 12" HDC3s, I do not see two 18s fitting in that car.
By the way, you usually see what you can fit before you buy.
'07 Chevy Trailblazer SS AWD (Garage Queen)
- Alpine 9887
- Eclipse SC8365 3-Way front stage
- Sundown SAX-125.2
'98 Jeep Grand Cherokee (Daily)
- Alpine 9887 (Active)
- Selenium 6" Mids, 4 Crescendo CTS-1 Tweeters
- Sundown SAX-100.4D
- 2 Sundown SA-12s
- Sundown SAZ-1500Dv2
Team Sundown Audio