hmmm. well it has a sliding adjustment door on it for tuning it said for just about any sub. for youre inverted project one you got just take some electrial tape and cover that white pipe up wraping it around and around it.

. id be afraid someone would bust my window out and steal that sexy sub. i like tint!. what sub is that and whats youre box design?. i might try to build that myself.? i liked it a lot. anyways..
i got a 12" sub im looking at now im thinking about making an inverted or some type of custom box for. im a huge fan of horn loading. i had a hatch back that was the loudest most satisfying system ive ever had. miss it a lot and im still trying for that again. i liked the wicked one box they have there but it just costs to much. with the death box its small enough were i can add another if needed.
also they added the choke because it increases woofer damping over the whole cone area. they tore up like 800 subs designing this box thuse the name. death box lol. ive heared some having port noise at highest voloume but ill just add some soft felt over that, itll stop it if it does have any.
im not sure but i think they make a single 10" version and a dual 12 and 10" version of the box. im going to have to inquire about it. i need just 1 10" version for a DVC 4 ohm mono 2 0hm load to my pioneer 1200 watt-600 rms mono amp i got.