Surpised they even made an eposide about it.

If any one here has ever attended a stereo sound-off "SPL contest", it pretty much involves the same thing. The top contenders bring barely driveable vehicles stuffed to the gills with subwoofers. The doors and windows are reinforced to prevent flex, which is where sound pressure loss would occur.

All of the systems are activated remotely...permanent hearing loss (and possibly bowel loss) would occur is the contestants actually remained in their vehicles during the competition.

Last I remember, the top SPL scores were in the neighborhood of 171 db!!!

For those cars with stock chassis but large systems, shattered windows aren't the norm...typically the window seals give first, so rear windows pop off (where most subs reside), and loose trim comes off.

Back in my car sound off days, the shop that did my install had a company vehicle that would dust the competition when it arrived. One year, the woofers in the trunk broke all of the welds from the ribs along the trunk lid!!

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car