subwoofer buzz - how to eliminate it

It's in the corner so I will move it, turn it sideways, try the simple things first.

thank you all! I moved it to the side, by the wall, and already sounds better.

thanks @gladmo 

I was looking at different ones on amazon, I will try this one

@gladmo Or I could just turn it sideways, it was meant to do that, I am looking for a clean and simple fix

@noromance what's the WAF of the slab? I would have to submit designs and as-builts for approval

@fred60 I am very inclined to try it, is it just a piece of foam with a piece of mdf on top? Do I need something between the sub and the platform, like springs?

@mijostyn I replaced the board in it and I probably need your tricks to make it tight. I may not have put it back together properly. 

thanks @gladmo I wish there was one platform for all these, there probably is, for big $$$

My only issue with the springs is the height/look but if it works, fine.

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

@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%

 all you need is the Auralex

and 

fix the sub to the floor

are they conflicting suggestions?  My floor is pretty rigid, hardwood on concrete. 

@ditusa great article thank you!