I'm revamping my rig, and I think the last thing I need to perfect it is a speaker that will excel at getting the fundamental tones out. I would never ever want this hypothetical speaker to be "farty". Would a 118 be better? I mean, I want this thing to basically be a subwoofer. Preferably no tweeters, and lots of porting. What would you reccomend along these lines? The head is a Bass 400. Oh, my other cab is a Mesa Diesel 410... If I ever want to make it to 20 without major back problems, please let this cab weigh less than that.