Single ported 4.5 cf 1-12" JBL guy here, tuned to 25hz.........
I don't have the ear of some of you audiophiles here, but I've enjoyed bass in various formats all my life, car audio and home.
That being said, nearfield right behind the center setting position of my couch this thing destroys.....as-in makes you jump out of your seat during scenes from Interstellar, Solo (Star Wars), GoT Battle of Blackwater bay scenes, etc.
I knew I wasn't going to build this to compete you with all of you animals nor do I have enough space, rectangle room sealed, 9.5x17'.
I love this thing and here is what I spent (see my user name for further justification).
$140-used Behringer 1000D (to limit and play with max output to prevent overexcursion so I know I can play it at any volume and was happy I had this limiter on when the cargo explodes scene in Solo............)
$50-couple pieces of scratch and dent MDF(70% off) 3/4", plus speakon's etc.
$30-JBL (oh yeahhhhhhhhhhhhh)
Speaker wire-had it
2-120mm comp fans, had them for a custom cooling solution since it was going in a cabinet and also I like to kick back knowing everything is safe
Total spent - $220
The box is fugly, heavy and a b**** to move, but i really really enjoyed building it and got a lot of pointers from people on this forum.
I say for all who are asking, sealed or ported, if you want something in expensive, low cost to try out silly stuff with, this thing is amazing.