Spikes versus wall coupling

A properly designed point or spike will provide a geometric path way for resonant energy to exit thru the point and into the larger mass it is direct coupled with. There are discs on the market which when placed under the coupling point increase the surface area of the point and provide surface protection of wooden materials. Your wooden floor is much more massive than your speaker so you should direct couple your Polks. The force generated by the massive radiator will only modulate the cabinet over and over again unless the speaker is properly grounded or coupled to the floor..Tom

Newbee way back when my oldest sister had a senior class prom party at my parents house, I remember my father being really pissed off the morning after..Reason was the new hardwood floors were dented from all the young ladies who wore 4 inch heels the nite before..You didn't see footprints from the soles of the shoes the guys wore even though the guys weighed twice as much. The young ladies' weight were more effectivly coupled to the wood floor than their much heavier male counterparts. A speaker cabinet while playing is not resting at a standstill.In fact the cone motion is modulating the whole cabinet.This cabinet motion can be as large as the exsursion of the tweeter of that same speaker..The most effective way to limit this loss of energy, this out of phase energy, this self perpetuating generation of resonance is to direct couple the speaker to the floor as described. Some coupling devices I know of are designed to limit the entrance of frequency's below 4 hz, so mother nature's blowups are less imposing on ones audio..Tom

I work for myself and for my clients. I sell products that I own myself, some of them are sourced from Starsound.Tom

Direct coupling if implemented and properly performed increases the likley hood of sucessfull resonance transfer.Ask your loved one for further comment..Tom

Barry you have not provided for an exit stratedgy for vibration to vacate the speaker. In fact you have provided no way out at all.. by adding mass and dampening at the top of the speaker you have 2 totally opposed counter productive non exit paths.Tom

Why change form? Are there no losses in conversion? If you let it vibrate, like it will do anyway, no matter what and you provide a efficient path way for vibration to exit would there not be be less loss than high mass dampening? Some coupling devices have a geometric bandpass at 4hz and below to reject the incoming at the point tip..Best Regards ..Tom

Barry is there any information on the speed or rate of vibrational dissapation of materials such as those in your designs versus the reloading or buildup of vibrational resonance in a typical stand alone audio component..Tom ..I sell audio and video products, some are sourced from Starsound..