Firtst 18" Set-up

[T3mpest 10+ year member]

Hard to say what's best but 18 def limits how you can orient it. For a hair trick sometimes cone area isn't best in a trunk since you need to get air into the cabin. Right now I can move a bit of hair from a head sticking in the windows and you can def feel your pant legs/clothes begin to move as well as smaller hairs with 2 15's just sitting in the cabin..... Box is currently broke atm too lmao. I have 2 15's and 4 passive radiators tuned to 25hz. I wanted something that would be fairly musical but still be able to move air on the lower notes... My car is a cadillac so getting bass in the cabin is hard. I removed the rear speakers and also removed the ensolite barrier that was between the back seats and cabin. I still have a steel X frame filled with a bunch of electronics as well as the very thick seat cushions to contend with.. My suggestion as others have said is try facing the port towards the trunk, and fire it really close to it.. Other option would be to turn it the way you have it but seal it off, but that'd be ALOT of work for minimal if any gain over using your trunk as a wall to bounce the sound off of.