If you're calling BS - All you have to do is go to Chucky's Connection in LongView, Tx - I'll make sure to be there...
... But it's not unreal - I could see if I said " 15?.?? " - that's gonna have to be a definite " do you have proof " statement...
If you look closely, my entire rear dash is cut... the 4 6x9 board is masking that.. my trunk has (2) layers of Second Skin, (1) of extreme dynamat, and Great Stuff Expanding Foam inside of most of the panels in the trunk...
... My side walls of the trunk haven't been touched ( no dynamat - no filler ( Expanding foam )) - I honestly believe if I were to fill the 2 sides up, allow 2nd skin and dynamat like I did everything else... I WOULD ACHIEVE SOME MORE NUMBERS...
( My trunk is almost like a tube... )
... But enough on me - Everyone is entitled to their own - It's all motivational in my eyes...
.... Where's your Port placement? on the dash firing towards the rear window... or firing towards the front dash?
And are your subs on your rear dash... Or facing forward into the cabin? Do you have a Gap in between the rear fold down seats, if so - How much is that gap... Are you using a Slot, Square, or Aero...