Having reached the pinnacle of my rotary subwoofer adventures, I bring you the rotary/regular subwoofer combo in the car. This setup is capable of audibly outputting frequencies from 40,000Hz all the way down to 0Hz, and I can even drive around while using it! It can also reach a stunning 140 dB at certain frequencies (around 12Hz). Watch as the system is used to literally "rock" the car back and forth, rattle the doors, shake the interior of the car, and more!