I think this is the exact opposite of what you'd want to do. You want to isolate the machine from the floor, so the vibration doesn't transmit through the floor into the rest of the structure of the house. I can't quite figure out how those pointy things are oriented, but if they are point down, that looks like a good way for the washer to stomp holes in the floor!

If you can make the floor more solid, both as relates to movement of the components of the floor relative to each other, as well as more solid like using a concrete pad, which has a much lower resonant frequency than the wood structure, that will do a lot to reduce the vibration. I could only apply structure atop my floor, because it's a second floor installation with a finished ceiling below it. If I ever have reason to replace that ceiling, I will definitely be looking into sistering up the joists in that ceiling. You can see what I did build if you search this forum for my posts about Bosch, platform, or FloodSaver pan.

I have Kellett Industries Shake-Away pads under the feet of my Bosch Nexxt 500. Even after all I'd done, there was still some wicked picture-frame and china-cabinet rattling vibration, til I installed those.

Actually, speaker spikes DO isolate the washer from floor using harden "discs" underneath the spikes.

Here is a link that might be useful:

I've always been under the impression that the speaker spikes are used to penetrate rug or carpet under the speaker or subwoofer to transmit low frequency sound waves through structure rather than through air. Some speaker comes with flat feet that can be reversed to reveal the spikes, others such as the one in your linked picture provided the disc to adapt installation on hard floor so it does not scratch.

Bottom line, the spikes are there to transmit vibrations. Probably not what you have in mind to dampen the washer's vibration. The Shake-away vibration pads do work to some extent but they are not going to totally salvage a weak subfloor or unbalanced washer.

Subwoofers produce their low frequency effects by altering the air pressure in the room with the cone in the speaker (pushing air).

It is never desired to have the subwoofer "transmit" it's effects via the floor. Here is some info on "base to floor vibration"...

"Spikes help reduce base to floor contact vibration. Spiking a speaker also reduces the contact surface of the speaker with the floor. Thus reducing the amount of vibration that can pass into the floor. Once the energy from a speaker is transferred into the floor it becomes non-directional. This means is will go wherever it wants, usually into another room or apartment where everyone can enjoy the little thumps thumps. These vibrations also have a negative impact on surrounding components."

So, in theory, this should work. I'll be the guinea pig and try it :)

According to another forum discussion regarding speaker spikes:

trebble, high sound, travels through air best, and does so pretty much all of the time.

sub bass / bass travels best through solids and is what it does most of the time.

now, the bass (as it is goign through solids) travels fractionaly faster than the trebble...however, as they are 2 waves, and they are *almost* together...the ear does not notice it.

MIDBASS however is where our problem begins...midbass travels partialy through the air, and partialy through the floor...because we have 2 waves and a slight delay (the wave in the floor goes faster) we are stretching the midbass (altogether a bit of a nasty sort of bass if heared on its own) and hence we end up with a "muddy" sound...very noticable in some cases

with the spikes, waves require a certain amout or low frequency to utilise the "coupling" and the midbass is *almost*all stoped from getting to the floor.

this creates 2 plus points, the sound is now less muddy, and as the sub bass/bass has its own "highway" all to itself, it also comes across clearer.

Anyways, you are proposing an interesting experiment to see if spikes will help your washing machine from vibrating floor. I think it is interesting since in this case there is no speaker cones to move the air and the vibration frequency is probably in the bass to mid-bass frequency range.

Here is a link that might be useful: Digital trends

I have a slightly off-topic question intenteded for greenfumbers4fowbers...we have had our Bosch for over 2 years, with steady but not horrible vibration issues that resulted in the washing machine inching over (during a period of months at a time) to the dryer. We got used to the vibration but the walking bothered us more. We then got the Kellett pads, which have been great in terms of significantly reducing vibration on our first-floor laundry alcove situated over a crawlspace, but it took the machine less than 2 weeks to completely slam into the dryer this time, even if it had stopped vibrating. My assumption is that the installer didn't level or balance the machine once he put the pads underneath. We also retained the pedestal, mainly because our installer tossed out the original washing machine legs when he installed the pedestal on its own - growl. Any advice here? We have been told if we did anything to bolt the machine down, it would only make the entire house shake.

In retrospect, I think my thinking may be flawed.

The subwoofer should produce minimal amounts of vibrations effects, compared to the rather "violent" vibrations of a washer, even if dampened. The disc underneath the spikes won't last much with the "resonance" effects of the washer.

I just ordered the Kellett pads and will try those first before pursuing the "plywood" approach.

Neetz...

I think if it's still walking, then it's still not level. Mine never walked (wouldn't have walked far, in the pan, but it didn't and doesn't). Search around on the forum for a thread that discusses a new version of the washer feet for vibration problems - there's a part number in the thread and I think it's the Bosch person named Chris that posted it. May be very well worth paying for replacement feet. I would imagine that the pedestal may only be accentuating the problems of walking and vibration. Lordy, don't bolt it down. That might "tear your house apart" (or sound like that's what is happening). The Kellett pads isolate the vibration from transferring into the structure. Bolting it down would more likely ensure that vibration is accentuated.

Can you get into the crawl space and "sister" the floor joists, and/or otherwise augment and support the structure under that flooring?

Greenfumbers4fowbers- thanks for your response! No, don't worry, we have no plans to bolt down the washer! We also don't want to follow Bosch's only solution, which was to use double-sided tape on the bottoms of the feet. I agree that buying a replacement set of hte original washing machine feet would help. We also may buy a set of GVI anti-vibration pads, which apparently have recessed circles in which to place the machine feet, which also might help. But I think that we still may try re-leveling the machine on top of the Kellett pads. The technician seemed to glance at the level and proclaimed it level and then left...sigh! And yes, our contractor had reenforced the floor with extra plywood and I believe that he had reenforced the joists as well. Well, at least the machine washes well but honestly, once the shocks wear out (as they will sooner rather than later due to the constant vibration), I'm going to buy a Miele!

I'm not so sure that bolting it down is going to solve your problems either, because the forces are still going into the floor, and your house is still going to shake.

If you want to stop the washer from moving, I think I remember another poster in this forum saying that they use adhesive backed sandpaper underneath each foot, that way the friction between the feet and the floor is increased.

I've never actually tried this myself, but I think it should work.

If you try the new Bosch feet it should solve the moving problem if your machine is level. It could , however, make the vibrations worse. I had two different Bosch machines until I could not stand the vibrations anymore. The first had an "issue" so was replaced with another. The first one had the old feet. After leveling and re-leveling several times, there were still vibrations and it walked across the floor. One time it actually started bouncing of my old and much small and lighter dryer. When it started smelling like it was burning, Lowes replaced it with another that had the new feet. After two days of leveling I finally got it just right. Even before it was completely level it never moved even a fraction of an inch, however, even after it was perfectly leveled etc., it still caused my floor to vibrate. In fact , the vibrations were worse than with the old feet. My salesman said that if the floor is too flexible (which I have been assured is the problem by a pro) the new feet will make this worse because they basically suction to the floor. I can believe that, moving it with the new feet to level the rear was incredibly hard. So if your floor is not too flexible, the new feet may be just what you need to keep your machine in place.

Again, I have no plans to bolt the machine to the floor. But it seems as if living with my original set-up (washer on top of a pedestal) may be the most livable under the circumstances. If we get rid of the pedestal and buy new feet for the washer, it sounds as if we may solve the moving problem (which didn't exist markedly under the original pedestal scenario) but increase the vibration problem. If this will be no better than the original scenario, and would not be significantly resolved unless we actually replaced the floor (not a possibility in the near future) then it sounds as if we might do just as well with the original set up. The washer is on lineoleum-covered hardwood on our first floor over a crawlspace and it sounds as if the floor is flexible enough to continue to contribute to, if not cause, these problems. I was going to go buy yet another set of pads (the GVI ones have recessed holes for the washer feet, unlike the Kellett pads, which are plain squares on which the feet balance - or not) and try that. At least our extended warranty is covering each and every visit!! And at least the machine continues to clean well.