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

Showing 11 responses by rrog

Wolf, No, you are not the only anti-spiker. Sometimes I spike and sometimes I don't. It depends on the situation. I do whatever it takes to get the best sound, but I know spiking is not always the answer as some folks believe.
"Don't need to. It's the same answer as when they are louder."

I couldn't disagree with you more. Spikes will make a difference at any volume, however, it will require high volume and significant bass energy to move the speakers.
I think spikes have more to do with bass energy in the cabinet than movement. Take a look at Vandersteen model 2 speakers while playing music with a lot of bass energy. Even with the speaker sitting on stands with spikes the top of the speaker has an enormous amount of movement. There used to be a product on the market called Microscan. It was a resonance control device that attached to the back of the speaker cabinet. The perceived improvement was better upper frequencies, however, this was due to draining resonance from the cabinet and removing unwanted lower frequencies.
Spikes have different affects in different situations depending on the speaker, system and the type of floor. If Dynaudio only supplies one type of spike for their speakers they have apparently voiced their speaker that way.
Starting with the CD3 MKII Audio Research has built in isolation so their CD player sounds the same regardless of what the CD player is sitting on. I guess this is their way of controlling the sound since the sound of a component can change dramatically depending on what it is sitting on. Maybe this is what Dynaudio is attempting to do also.
On the other hand Dunlavy speakers did not come with spikes at all. However, my SCIVs had no problem with imaging or bass. My CLS only had spikes in the front, no spikes on Maggies, but Vandersteen 2 and 3s are sensitive to spikes and the type of stand that is used. This list could go on and on, but what it comes down to is speaker design.
I love it when manufacturers claim they are using material developed by NASA. I bet the people at NASA are laughing their asses off.
"or maybe they're saying, "hey, i developed that!"

You are giving these con artists far too much credit.
I like to think speaker manufacturers, especially those with a proven track record, know what they are doing when they assemble a speaker system and provide specific accessories.
"C4 cabinets have next to ZERO resonance even when played hard, so it's the WHOLE unit being moved by the woofers in my case."

Then explain why the spikes make a difference at any volume level.