There are other options that have much greater output and extension for less money. JTR has the Captivator S2
for $2999. This sub has more output and can reach the ulf with ease. Can you fit multiple subs in your room? Having more than one sub allows you to make sure that you are getting the best frequency response possible. In this case you can get 2 Captivator S1's
. Another monster of a sub is the PSA Triax
. This sub is tuned for 15hz extension so you wont miss anything in your HT.
That room is 3600 cu. That isnt small and not to mention you say its not sealed which means that you usually need to factor the other space as part of your ht, at least when it comes to the sub.