How handy are you. Maybe build one of your own. I got a kit from creative sound solutions and made my own cabinet. I got a real sense of satisfaction building my own sub and ended up with some serious bass. It uses tuneable passive radiators,though i set it up according to instructions for a 27hz output. Make it any shape you want as long as you adhere to the internal volume specified.Check it out creative
DOG is GOD spelled backwards.
I blame my terseness on my keyboard.