"Joseph Oberlander" wrote in message
hlink.net...
Robert Morein wrote:

"GlueGum" wrote in message
.. .

I was wondering what's the best type of floor to have under a downfiring
subwoofer. I currently have wood, but have been thinking about going to
carpet, or maybe even tiles. Would either of these have any positive or
negative effects on the subs output? Is one type better than the other?

Also, if needed, can anyone recommend a slab of anything to put under
the
sub for optimal performance?

Thanks.



Carpet would not make a difference.
Heavy ceramic tiles would.
Concrete is best.

The only important factor is the stiffness of the flooring, which is
usually
reflected in the mass density.
An absolutely rigid floor, such as concrete, would prevent coupling of
the
energy to the frame of the house.

I agree. A wood floor on a raised foundation? Front-firing sub.
Down-firing
in this situation will literally cause things to rattle and resonate.

And the frequencies bouncing around the walls won't?