Hello, I have 3 avi sls300 subs at my disposal and a Digital Designs M1A to power them. I'm considering a ported box for 2 of them at 5 cubic feet with heavy polyfill (making it closer to 6 cubic feet) tuned to 25hz but I've heard their reputation for sounding incredible and low in a 1.1 cubic foot sealed box. I would use all 3 of them If i went sealed at 1.1 cubic feet each (isolated chambers). I'm after great sounding SQ as well as high output around 30hz. I know I can't get the best of both worlds but what would you guys do? Thanks for your help!!