@georgehifi Agree with you about wood floors. And coupling to a concrete slab floor can yield fine results... but, when this issue came up a couple years ago, I decided to decouple my main speakers and subwoofers and what I hear from that is greater clarity through the entire frequency range.
Why? With decoupling, the energy from my speakers is dissipating across the carpeted floor rather than being transmitted into the slab underneath and then reflected back into my equipment rack and speakers causing a slight smearing and loss of detail to the sound. It was quite definitive and after experimenting back and forth there is no going back to coupling for me.
The bonus benefit to the rest of the family is that my basement listening room is not rattling the upstairs when heavy bass is present in the music!
Why? With decoupling, the energy from my speakers is dissipating across the carpeted floor rather than being transmitted into the slab underneath and then reflected back into my equipment rack and speakers causing a slight smearing and loss of detail to the sound. It was quite definitive and after experimenting back and forth there is no going back to coupling for me.
The bonus benefit to the rest of the family is that my basement listening room is not rattling the upstairs when heavy bass is present in the music!