what do you put under your sub?

In my previous post, I made the assumption that the sub cabinet does not resonate in the frequency range you are using it for....if you have a cabinet that resonates (side walls waffle) then you have serious problems...coupling to something massive, like the concrete floor may help to dampen this but cabinet resonance means you will have distortion, especially on transients....normally a sub will be solid and very heavily braced internally to prevent this happening (i.e. no need to couple it to something solid in order to stop it resonating)

shadorne, the cabinet does not resonate at all... im fairly certain the problems i have are placement/ room effects. simply need to keep trying new locations.

Rel Stentor MK2...I put 200/pr Symposium Rollerblock Jrs under it, best tweak I have ever done. I totally lost the "one note blues", the sub opened up, easier to integrate..I used four, one under each foot. I can't begin to tell you what a huge diffence they made, and for a change, a tweak that wasn't a trillion dollars.

Auralex Gramma