subwoofer buzz - how to eliminate it

This may be a long shot but check the mounting screws for the drives I did this for my two powered subs and was surprised how many were lose Hey I do the same for my tower speakers 

@jrwaudio exactly.... since I swapped the board in it, 2 out of 8 were loose

@Grislybutter

Doubt that was it, but always good to tighten lose screws especially on a sub woofer

@grislybutter Wrote:

At low frequencies, it vibrates, like it wants to fall apart. 

Just a guess, sounds like you are overdriving the sub.

Mike

@ditusa sorry for my stupidity, how do I overdrive it? 

I am not setting the volume on my amp high, just medium. The gain setting on my sub is at 50%