YouTuber Mattizzle008 decided to mod a hallowed-out (get it?) pumpkin to measure its acoustics in a car subwoofer rig. He even took it to Xclusive Autosound to get it metered for science. Turns out pumpkins can get some if you need all that bass.
The sweet spot was the key of G, with a max decibel level of 144.2 db at 49hz. So if you want to recycle your jack-o-lantern, consider a squash-based second life as a rolling annoyance.