I love VMINNOVATIONS! I oreded 4 of these things yesterday at noon and got them today at noon! Anyways, my last 4 15s box was huge and wanted to keep this one smaller. I ended up getting a little over 12 cubes and keeping it under the headrests. Its tuned to 32 hertz give or take a few hundreths. Its pretty loud on my AP3000, but the subs are barely moving haha. I need to get me some new amps for these lil guys. I will make a video soon of them because there are some people on here that were wondering if these subs were any good and what they could do!