so i have had a whole bunch of sound systems. i have had 2 15 inch, 4 12 inch, 2 12 inch, and now i have only one 12 inch. but it hits harder than all the other subs i have had. plus i like to use my trunk so one sub is perfect. both loud enough to get a ticket and very open, so i could put alot of crap in there! not finished yet but getting there soon.