lol, that's not what the sensitivity knob does. It merely sets the minimum db reading. You can tell in my vid, it was set at 143.8db and it says und until i hit 143.8db, then it reads. The other kid turns it down once he realized that and i was doing 143 steady on music and it read db all the way down to 142.8, which was after a 50 second constant run and the alternator couldn't keep up. It just sets the minimum db needed for it not to read und. Seriously, misinformation is rampant on all car audio forums.
Lol, he's also a trunk hater. Dude hasn't experienced trunk gain. It's an advantage. There's cabin gain in all vehicles, but trunk vehicles also have trunk gain if you don't wall it off (and if it's not walled off from the factory) and trunk gain + cabin gain = more gain period = louder, but it all depends on the vehicle. Cabin gain is what makes cars louder than houses/buildings etc. And trunk cars have trunk gain that stacks on top of cabin gain which creates even more gain/higher db than vehicles without trunks and with the same equipment, the only downfall is space limitations and tuning totally depends on the vehicle. I will say i would not expect that single 12 to be any where near as loud in my suv but in my little altima, it was a lot. There was just something about the tuning of that vehicle and the trunk was very open to the cab, the center console flipped down and there were vents on the rear deck (which were destroyed by that single 12, among other things including the metal roof-mounted rear-view) which helped tremendously. It sounded 10x quieter with the center console up. Every car is different, he just doesn't understand that trunk cars are different and that under the right circumstances with the right tuning and the right car, high numbers are possible. The altima was a great car for beats, i've had two of them and even two crappy 10" bottom of the line pioneers in a crappy 1/2" particle board prefab tube-ported box on 300 watts surprised the hell out of everybody. I've had countless systems in my altimas and they all sounded amazing, the t1+1000/1 being the loudest of them all, the only thing that compared in loudness was a 12" l7 in a custom box but it was crap sq, the t1 got even louder and sounded 100x better doing it. It's all about vehicle tuning, tuning of boxes, and good power. If you want to be loud, you tune your system around the vehicle, not the other way around.