Coupling vs Decoupling


I’m new to this forum and have been doing much reading. I’m aware working with the room and equipment can produce dramatic changes in sound. One topic I’m lost with is coupling vs decoupling. When, where and how to apply each method to produce the best outcome?  

My current system is KEF R900 towers with matching center, R600C and surrounds, R300 and a pair of JL E112 subs flanking a Sony A1E TV.  The room is a bonus room approx 24’ x 14’ with all centered on the 14’ wall. 

Currently the towers are equipped with spiked plinths and subs sit directly on the carpet with their OE feet.  Any feedback about how to best manage acoustic vibrations and when/where to apply coupling or decoupling methods is greatly appreciated. 
jdeickhoff
jdeickhoff
the floor is a second story carpeted wood floor in a bonus room above the garage. The TV and components sit directly on a wood console
Always de-couple your speakers and equipment from a wooden floor even if it's carpeted, unless you want the floor to act as a sound board and ruin your bass.

Cement slab floor you can couple to.

Cheers George
@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!

Thank you all for your response and input.  I've just begun the online search to learn of all the available products and options.  I'm interested to learn more about IsoAcoustic and Townshend platforms and pods.  Does anyone have experience or feedback about these companies or products?  Would either of them be a good option for my KEFs and JLs?

http://www.isoacoustics.com/gaia-series/

http://www.isoacoustics.com/orea-bordeaux/

http://www.townshendaudio.com/hi-fi-home-cinema-equipment-vibration-isolation/hi-fi-home-cinema-vibr...

http://www.townshendaudio.com/hi-fi-home-cinema-equipment-vibration-isolation/

Thank you for your time and input.

@geoffkait  - Mass on spring isolation for speakers happens to be a hot topic these days with at least a few Mass on Spring solutions available to audiophiles, including those from your humble scribe.


"From your humble scribe"....... Can you pleae elaborate?  I am very interested to see and learn more.