lvl3s 12s are awesome. Got mine on 1600w. portedhere you go hitman, just to give you an idea. My set up is 2 lvl3 12s in a ported enclosure tuned to 32hz. Box was designed for my lvl2s but I upgraded from the 2s to the lvl3s after about 2 weeks lol. Box still works great, but I have a feeling I'll be doing a rebuild soon. 3.04cuft after displacement (1.52cuft per chamber)