Millercarbon's Mega Vibration Control Journey


Vibration control is such a huge, and hugely important, topic it deserves a thread of its own. There was a time I thought it nuts to say such a thing. In fact I wrote a letter to the editor excoriating them for wasting my time on the goofy idea that clamping components between shelves could have any effect on sound at all, let alone be worth spending good money on a rack designed to do just that. This was the Michael Green rack, and thanks to my closed mind and dismissive attitude I never did bother to try and find out for myself if there was anything to it.  

Important Lesson Number One: Don't be so quick to dismiss things just because you can't understand how they could work. 

Couple years later unpacking a McCormack DNA1 amp the Owner's Manual says the included spike can be used to improve sound quality. Well now. As crazy as it still sounded this time its Steve McCormack, and he's already given me the spike, so what do I have to lose? Much to my surprise it did indeed improve the sound. Not a lot. But definitely more detail, clarity.  

This is very early 1990's. There is no internet. I know precisely zero audiophiles. Until stumbling upon this one guy at work who says oh yeah and put your CDP on a phone book, and another one on top. Which sounded even crazier but the guy was serious and this being the 90's we all had phone books laying around so I gave it a shot. This time it was only the most barely perceptible improvement, but it was there. If you really listened for it. So not much. Then again, free. Wrapped some fabric around it, ran the CDP like this for quite some time. 

Around this time I'm shopping for components for my new listening room when this guy is more excited about something called Black Diamond Racing Cones than the amp or whatever he was trying to sell me. So I get 3 of these things and they're so much better than the phone book its hard to believe! Well, okay, it was a phone book. Got to compare against something, right? 

These Cones are so good I take them to this Seattle audiophile club and show them around all excited and.... nobody cares. Except this one guy who goes on and on about how he has tried phone books, tennis balls, racquet balls, styrofoam, cones, spikes, on and on everything under the sun, he's tried it all there's just no way he's gonna be impressed- he makes this very clear to me- but okay you're the new guy let me borrow em why not. But they're not gonna work. No way. 

Next day this guy calls me up gushing going on and on how great these are what are they again where did you find em how many can I get? I actually wind up becoming the Washington State distributor for Black Diamond Racing selling Cones, Shelf, all of it. This guy winds up like me, pretty much everything on BDR.  https://systems.audiogon.com/systems/8367  

A lot of what I knew about vibration control back then was based on my own experience with BDR, and learning from owner DJ Casser. This resulted in what became my guiding principles of vibration control: Mass, Stiffness, and Damping.
128x128millercarbon
MC, I have an issue that is going to be rising, same thing.. Leg on the speakers! I have 5 pieces that are on Queen Ann legs, there will be 9 total. 4 leg per. The cabinets vary from, hardwood, to MDF and HDF.

I need to figure some type of magic for the vibration issues in the hardwood legs. I’m thinking drilling and filling with lead, and or silicone?
problem is if I fill with silicone and don’t like it... Hard to get back out..

Lead shot? I have a shot maker. Been 45 years, but it turns out 50 at a pop...3 different sizes.. What you think on the legs and dampening (vibration control). I’m at a stop because of it..

I know I can bore the legs and add the shafts for the shot.. I just want a simpler solution... AND not kill the "Look" that was the reason to begin with. Elegance and complete precticaly.. I want it all. Silly me..

Put the legs in pots? or a pit? AGAIN what the heck is that gonna look like? :-) I like LEGS... what can I say?

I know ugly works... OK I know.. I was going more for the Ginger Rogers Gams though...

Regards...
oldhvymec,when you say legs, are you talking about the 4 speakers on your system page? I kind of have an idea that can be DIY that you may like?
And you could paint to match the cabinets.

You have a PM mate
have an idea that can be DIY that you may like?
And you could paint to match the cabinets.

You have a PM mate

<<<<<<>>>>>>>>>>>>>>>>

I'm all ears.. LOL, and out of gas. Man oh man, I get tired easy.. Winter is gonna be here in an instant.. I'm moving all the outside stuff inside..

PM me, I want to share the vibration stuff, and not clog MC thread up with the other, kinda tough..  I'm gonna try though.. I've set up a pit.. for the MB columns. 

Adjustable dampening for Hydraulics is another option.
Rexroth make a wonderful 12-24 vdc unit, fully adjustable a and b circuits... for loads from 50lb to 5000lb, shock ratings are VERY quick...
As fast as a hammer strike...

https://www.boschrexroth.com/en/us/products/product-groups/mobile-hydraulics/topics/accumulators/ind... 

look about mid page, THAT is a bidirectional with neutral hydraulic A/B dampening circuit. Elect over Hydraulic... Add shocks and a henge, almost perfect in design.. 100% dampening adjustments for every weight and speed.. THEN springs would be easier to implement, if at all, compare air ride to spring over... USE BOTH, the best of old and new.
Cantilever..???

That could handle 2 -10 pieces (circuits) for around 1500.00 for 4 speakers and at least one HEAVY Equipment rack....  gears are grinding for sure. 400 lb speakers and 500-1000 lb for the TT and gear rack..

Regards..
If you just want to fill, mix sand with mineral oil, not much just enough to get good and damp so it packs better. Then mix with lead shot and fill your legs. But those legs are stubby, doubt this will do much. 

I have a much better idea but need to know: Are the stands and speakers two separate things or all fastened together?
Yup they are attached via screws, BUT not glue. I can add between the two. I was looking for a finer furniture look though. I was thinking O-Rings between the two, maybe more than one grove, more than one ring..

I just started sound testing. I was surprised.. Those legs and MDF are pretty good.

The Hardwood TT plinth, though.. MERCY. The oak is so cured and HARD. Pretty noisy.. It took all summer to get the corner seams to settle. They were glued, a blocks added, drilled, clamped and THEN screwed. I almost had to thread the holes.. that was some HARD wood.
Black Oak block and resin. Red oak shins... Stair flats 3 years cured...
1" thick..

Rubber line? What is the name of that sh$t, that you paint on the inside of speaker cabinets... Ceramic paint? Can’t remember... BOTH. Paint and rubber, or silicone paint? Is there such a thing? THE cost... What about that spray stuff for fixing leaking gutters, or holes in boats... That stuff... Gotta be silicone.

Chicken feedin’ time...

Regards.