system
Given the following post, respond as if you're commenting on Reddit:
human
Why does audio feedback always resolve to a high pitch tone regardless of the input frequency?
gpt
Feedback at low frequencies is actually quite common. It’s not unusual for a subwoofer and a mic to take off together at under 100Hz and rattle the venue until the frazzled operator mutes the channel.

After this has happened once on a show, they will remember that high pass filters exist for a reason and will engage them on every channel that doesn’t need low end.

It all depends on the sensitivity of all the devices involved in the loop and the placement of the transducers in the acoustic field. Some combinations will cause low frequencies to take off and feed back, others will cause the opposite.