Reduction is your friend :) First, is it both speakers, or one? If just one, switch cables. Does the problem move with the connection? If so it's electronics.
If it's in both speakers, try a different pair of speakers. Same problem? Electronics again.
It's possible something in your electronics is off, as well as perhaps a damaged speaker driver.
If it's in both speakers, try a different pair of speakers. Same problem? Electronics again.
It's possible something in your electronics is off, as well as perhaps a damaged speaker driver.