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Speaker Support - Three Feet or Four

I'm thinking of going to a three-point foot system for my Gershman Acoustics Sonogram floor standing speakers.

Reason for doing this is that the hardwood floor shifts with the seasons and a four-point system can require adjustment throughout the year.

Each speaker weighs 63lbs, has a baseplate footprint of 10.75" wide and 16" deep. The basplate is 0.5" larger all around than the actual speaker cabinet

I believe the centre of gravity to be just below mid height and relatively centred from a footprint perspective.

I plan on mounting the two feet that levels the sideways attitude on an outrigger.

Are there any advantages to placing the outigger feet at the back or the front?

or is this just a matter of using the best config for stability based on centre of gravity?

Is there any advantage to having the feet equally spaced or use the maximum distance possible within the confines of cabinet footprint + outrigger dimensions ?

Or should I just stick with four feet?

Note: I don't have to worry about kids or pets bumping speakers :-O

Thanks in advance
williewonka
m-db's avatar
m-db
995 posts
 
   I live on the California Central coast near the Loma Prieta epicenter with everything on a wood floor. My 145lbs. speakers came with three precarious non-connected metal cones per speaker.
   I made eight large 3x2x1.5" clunky looking walnut blocks. I fully covered their bottom and top surfaces with heavy duty felt and Gorilla brand clear thickish two sided tape to attach to the speaker. Despite the increased overall stability the felt and tape combination provides some bi-directional movement that the cones didn't.
   I have know idea why this is but the focus and sound stage is noticeably improved. Lucky me. 
mijostyn's avatar
mijostyn
8,570 posts
 
Three feet is always better locked to the floor but not necessarily more stable. It might be easier to knock the speaker over so placement of the feet is critical. I put two feet up front in the corners and one in the center back trying to get as close to an equilateral triangle as possible. As far as sound is concerned locking the enclosure to the floor with three feet is probably more important for subwoofers which obviously vibrate a lot. I would hazard a guess that most of us long term sub users have seen them migrate across the floor. Any movement of the enclosure is distortion. I can not say it makes any difference in the satellites but I suspect not.  
m-db's avatar
m-db
995 posts
 
   Last night at about 8:30 pm while listening to Miles Davis' 'Nefertiti' we had a small 2.3 followed by a moderate 4.5 earthquake. Not really a big deal but my 45" tall speakers visibly rocked from side to side. 
   Had I not replaced their three non connected spikes last week I'm almost certain there would have been an issue. Strangely, the thirtieth anniversary of the Loma Prieta quake is this Thursday. Once again, lucky me. 
mitch2
4,079 posts
 
@geoffkait
We don’t want anybody going ape, do we?
Don’t apes have four feet? 🐒

Does the answer to the question also depend on whether the speaker is coupled with something hard such as a metal spike or ceramic footer vs. decoupled with some sort of elastomeric doo-dad? The decoupled approach would possibly take care of any four footer rocking concerns.
geoffkait's avatar
geoffkait
23,365 posts
 
Apes have four feet? I did not know that. 
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