What is so dumb about it? You don't think it is possible to have a single sub setup louder than a multiple sub setup? I get that responce all the time with a single 5200 lOl. It is all in the install. Polo..
Theres a big difference from a single sub set up, to sealing off your trunk from the cabin. And that looks like shit BTW, I hope a beauty panel makes that look presentable. Since its loud, what kind of numbers has it done etc...
I think its very possible to have a single sub set ups that wang, i have had a few.