Speaker Spikes - do the shake test


Everyone by now knows that speaker spikes improve the sound. The theory is that the tweeter excursion is so short, that any speaker cabinet front to back movement creates Doppler / intermodulation distortion. That movement can exceeed, by many times, the excursion of the tweeter. So, the effect is most pronounced up top and then towards the bottom most frequencies. Or so they say.

I have some C4 series II speakers that come with four “spikes” in the plinths. But, the people in Denmark seem to think we all have hardwood floors. The so-called spikes are dull “lugs" that really are meant to sit into four small aluminum floor bot dots, for any better term for them. Many have speakers on carpet, and the so-called spikes sitting on those four round aluminum discs still are pretty wobbly on carpet.

Last week, I pulled all eight of the spikes (not nearly sharp enough, with a 30 degree rounded tip, to be called a spike) and had the guys in the machine shop at work lath them to 60-degree POINTS!

OK, re-installed and speakers leveled (four point level is a pain). WOW, now they are stable as a rock when you push and tug on them. What was NOT expected, was that the BASS response is significantly better. Not that bass is easy to do, but the contribution to the C4’s bass that spikes that are now planted into the concrete floor and under the carpet is amazing. The bass can now place a black dot on a white background as needed. Everything isn’t a shade of gray in the bass. I always felt that the C4’s weakness was bass definition, but the weakness is that Dynaudio doesn’t supply two sets of spikes, those for hard surfaces and those for carpet. That’s too bad, as the supplied spikes don’t cut it on carpet. My spikes are now good enough to pierce down below the carpet and rest on the concrete. But, real spikes should be like half-inch ten-penny nails that don’t chew-up the carper as much as my 60-degree spikes. But, I can’t find this spikes for the C4’s.

If you are like me and haven’t given your speakers the shake test, go do it! If they wobble around any at all see what you can do to fix it. The rewards are well worth as close to free upgrade as I’ve ever done. Don’t think for a second that it seems, “good enough”. If they move around, it isn’t.
rower30
Although I wasn't asked, I don't need test results or a detailed explanation of Coneheads, they said they're from France and that's enough for me. By the way...recording studios have little to do with Audiophilia in the sense most hifi heads would recognize...spitty and boomy JBLs then Yamaha NS10 monitors that sound ridiculous became reference nearfield monitors, gigantic horn loaded monster speakers hanging from the ceiling, clueless engineers...it's amazing anything listenable comes out of studios...just fix it on the computer or in mastering.
"or maybe they're saying, "hey, i developed that!"

You are giving these con artists far too much credit.
Ranking of materials used for cones or feet, listed in descending order. No offense ito any manufacturers or audiophiles intended.

NASA grade ceramics

Steel

Roller bearing assemblies (isolation devices)

Happy Balls (aka "Super Balls")

Brass, large, Michael Green

Aluminum

Brass, other

Carbon fiber

Sorbothane
Geoffkait,

Shouldn't you state that you're a manufacturer in all of your posts?
I will add my 2 cents as an engineer with experience in dealing with vibration from machinery. Elastomers are used to absorb/isolate/dissipate vibration and certainly help with components like CD players. Spikes made from metal or exotic hard materials do nothing but transmit vibration and couple the speaker to the floor. This will alter the resonant frequency of the vibrating speaker panel which will affect the sound for the better or worse. A dense, heavy, well designed cabinet may have no need for spikes, in that case you may very well prefer vibration isolators under the speakers like Wolf Garcia does.
In my professional opinion, ranking materials for feet has no scientific basis because you are not taking into account the actual cabinet the feet are attached to. It would only make sense if we all had identical speakers!