Comment by ominous_prime

The claims sound somewhat exaggerated, 5kw of subwoofer is nothing in live music venues, though they purposely don’t go as low. Here’s some more modern “big” subs, which are larger and can radiate significantly more power

https://www.aia-cinema.com/products/the64-sub-pro-passive-se...

https://www.aia-cinema.com/products/the100-sub-pro-passive-s...