Subwoofer for Wilson Maxx2


my room is about 22x33 ft, my maxx2 are sitting about 11ft from the front wall, and 8,5 ft apart

i get very good image, width..depth..etc.., however not enough bass

i tried to locate the maxx closer to the front wall, from 4 ft..etc.., however at 11ft everything are better, but not enough bass

so i want to add 2 subwoofer ...wondering any Maxx2 users or full range speakers user are running subwoofer and able to give me some suggestion ?

i do not want to spend that much for Wilson Sub...
mgmmgm
occasionally..i felt that weak pressure wave, i want more from those drum records..which i know..they have plenty low notes, and heard those waves from the same record from some set up

wondering how much improvement fromthe DD18 Plus or DD15 Plus Vs the pervious version ?
now using the XP20 Pass labs with the performance II, Bass is better, but know..it can be more..power low end wave in my room and from those recording

any more suggestion for the Sub woofer?
I had Wilson Maxx 2's for years and now have Alexandias. The bass in the Maxx 2 is plentiful, but can be difficult to control. Initially I had a REL Studio III with the Maxx's. I ultimately got a pair of JL 113's. I can not recommend them more highly. The Alexandrias have excellent bass, and mine are 4 or so feet from the back and side walls. However, adding the JL's was like being hit over the head with a mallet compared to the REL (which is a $10,000 subwoofer BTW). As you know, the JL's have room correction which works well. The bass is musical as well as powerful. 2 friends have Gothams which I had heard extensively before I decided on the JL's myself. My room (25x17x11) is smaller than theirs thus we all agreed the 113's would suffice. I would be very surprised if 113's wouldn't satisfy you. Also the price/performance ratio is highly favorable. PM me if you wish.
does the JL...change the wilson tonal balance little bit?

a pair if JL113..used is not expensive at all
beside that..how u support the JL113...do u make a stand to make it a little bit higher ?