Pros/cons of rubber on floor?
 

Do you think that would lessen flex or would that take away wanted kinetik transfer?

You want kinetic transfer to the floor?

I'd like to feel bass in my seat as well as hear it, just not at the cost of a noticeable loss of SPL.

aura bass shakers

It would be weird having moderate bass with lots of kick in your ass lol, that wouldn't add up. $30 sounds like a deal though.