some oversimplified technical considerations:
- you can't go louder than 0db anyway, circuit bent or not
- the lower the frequency of the sound, the quieter it seems, i.e. 0db of 100 hz is much quieter than 0db of 1000 hz
- once you've reached 0db, you can only add volume to some frequencies if you turn down other frequencies
- human hearing is most sensitive to frequencies between 2000 and 5000 hz
- loud sounds seem louder when placed next to quiet sounds
conclusion:
play something quiet, then blast shit clipped at 0db, highpassed at 2 khz and lowpassed at 5 khz
something along those lines likely happens on The Elders Of Zion
you can open it in a daw and check the frequency analyzer