I would like to know if I can use a tower speaker in my listening position playing bass tones do you do that subwoofer crawl. The reason I ask is because I am disabled and I cannot lift a 90 pound subwoofer to put in my listening position. Is this a good alternative to put my tower speakers in place of subwoofer in my mop. Any other suggestions on how to do this because I simply cannot lift a heavy sub.