Turntable Isolation platforms?

[rpampt]

What about some thin MDF or Plywood with something like Dynamat sandwiched between a couple layers?

Just an idea, not anything I've tried.

 

[jleon92f]

What about some thin MDF or Plywood with something like Dynamat sandwiched between a couple layers?

Just an idea, not anything I've tried.

I think anything that absorbs the rumble or vibrations and makes a smaller foot print will work. This is my 1st attempt at this. I just wanted to see if there would be a difference in the sound, and there is a substantial difference, at least to My ears.

I still have some lumber left from the 1st one.

Thanks,
John.

 

[jleon92f]

No don't use that it never will dry. I just wanted to say the natural finish looked awesome. You could stain to richen the grain and then poly the wood...
That would look cool too.

Thanks, I like the natural wood look and would like it to match the Sony wood trim if possible.

Thanks for the ideas.

Thanks,
John.

 

[Puma Cat]

I played some Sinatra and Fleetwood Mac so far, WOW there IS a very noticeable difference in the clarity and the sound stage! Awesome! Bass is cleaner and has punch!

From a block of wood?
Thanks,
John.

Now, put your board a 12" or 16" inner tube inflated to 10-12 psi. You've haven't heard anything yet...

 

[rpampt]

How about sitting on bubble wrap?

 

[wushuliu]

Hi, Thanks for the info on the LACK tables. I have a Ikea right near me. Are they using the table as a seperate table for the TT alone or are they cutting the top down?:scratch2:

Thanks,
John.

You can use it as a separate table, use the top only with cones (I think), or you can get buy several, cut down the legs and stack them with brass cones to make a rack which look pretty sweet. Ken runs, or ran, Neuance Audio and made a strong case for the black Lack being a cheap alternative to his own $200 platform due to the construction/materials used. I would provide a link to the main discussion by Ken on AA but I'm not sure what the protocol is on linking to other forums...

 

[Puma Cat]

How about sitting on bubble wrap?

Air pressure is too high. It has to work as a filter for resonances in the 3-12 Hz range.

 

[jleon92f]

You can use it as a separate table, use the top only with cones (I think), or you can get buy several, cut down the legs and stack them with brass cones to make a rack which look pretty sweet. Ken runs, or ran, Neuance Audio and made a strong case for the black Lack being a cheap alternative to his own $200 platform due to the construction/materials used. I would provide a link to the main discussion by Ken on AA but I'm not sure what the protocol is on linking to other forums...

Thank you very much, I will be going there tomorrow!

Thanks,
John,

 

[rpampt]

Air pressure is too high. It has to work as a filter for resonances in the 3-12 Hz range.

Puma Cat,

If the bubble wrap is too "rigid" due to the pressure, how does solid wood filter those resonances? Or doesn't it? What about using 3 or 4 gel pads?

 

[mjalazard]

We have several marble pastry boards given to us.
One of them measuring 12" X 18" is being used to support one of the turntables.
Initially it was just placed there just to save space.
But then we found out that the vibrations caused by walking around the turntable have been eliminated. :thmbsp:
The marble pastry board comes with little rubber feet measuring about 1 centimeter, approximately 1/3 inch.

Here is an inexpensive one ( $12.99 ) of similar dimension.
http://www.kitchencollection.com/Temp_Products.cfm?sku=00643423

Sorry, I put in a different web site the first time, this one is the correct one.

The marble pastry board is an excellent idea. Years ago I purchased a pair from Ikea. I unscrewed the little feet and sandwiched a thin layer of Sorbothane (I'm sure that any damping compound used for automotive sound control would work) between the marble boards. The whole, heavy platform sits on four large Sorbothane feet on top of my Billy Bags equipment rack. One afternoon, while listening to my turntable, (and to quote Tom Petty: while "living in Reseda") an aftershock from the Northridge Earthquake hit the house. The VPI played right through, without missing a beat.
You can see the double marble sandwich in this photo...I no longer live in Reseda.

Mike

 

[dynacoPAS]

I use a 2 inch thick piece of maple for isolating my suspension thorens turntable. I find that it does the trick.

 

[Puma Cat]

Puma Cat,

If the bubble wrap is too "rigid" due to the pressure, how does solid wood filter those resonances? Or doesn't it? What about using 3 or 4 gel pads?

I didn't say it was too rigid, I said the air pressure was too high. This causes an artificial mid-bass hump, the higher the pressure, the higher the frequency this occurs. The inner tube works differently than the board at functional level. The idea behind the board is to drain resonances as quickly as possible, and why stiff but light, lower mass boards are better than thick, massive ones. This is why the Neuance platforms were so effective. If you look at the design history of the Rega turntable, you will see that the trend for the plinth is in the direction of lower mass, not increased mass. This why the P7 and P9 tables cost more than the P3 and P5; their plinths are a lighter, lower mass design that is also stiffer.

 

[Puma Cat]

The marble pastry board is an excellent idea. Years ago I purchased a pair from Ikea. I unscrewed the little feet and sandwiched a thin layer of Sorbothane (I'm sure that any damping compound used for automotive sound control would work) between the marble boards. The whole, heavy platform sits on four large Sorbothane feet on top of my Billy Bags equipment rack. One afternoon, while listening to my turntable, (and to quote Tom Petty: while "living in Reseda") an aftershock from the Northridge Earthquake hit the house. The VPI played right through, without missing a beat.
You can see the double marble sandwich in this photo...I no longer live in Reseda.

Mike

Your marble platform would work better on an inner tube than on the Sorbothane feet. And plywood would work better than marble.

 

[rpampt]

I didn't say it was too rigid, I said the air pressure was too high. This causes an artificial mid-bass hump, the higher the pressure, the higher the frequency this occurs. The inner tube works differently than the board at functional level. The idea behind the board is to drain resonances as quickly as possible, and why stiff but light, lower mass boards are better than thick, massive ones. This is why the Neuance platforms were so effective. If you look at the design history of the Rega turntable, you will see that the trend for the plinth is in the direction of lower mass, not increased mass. This why the P7 and P9 tables cost more than the P3 and P5; their plinths are a lighter, lower mass design that is also stiffer.

No Puma Cat, you didn't say rigid, that was my wrong assumption. It's making sense to me now. So would gel pads since they are lower pressure work and also give damping via the gel? This is very interesting. Thanks for sharing your knowledge with a newb.

 

[Puma Cat]

No worries!

Really, try the inner tube. I am sincere in trying to get the best sound for you.

 

[jleon92f]

Now, put your board a 12" or 16" inner tube inflated to 10-12 psi. You've haven't heard anything yet...

I will have to try that too, where do I get these?

Bike stores?

Thanks,
John.

 

[jleon92f]

Still Testing...

I played some more records yesterday, Tina Brooks,Floyd, Etc.

The sound is so clean, I have no other way to describe it. Words are clear as if they were here in the room. And my room is not really set up for playing music speaker location wise, I have to Balance it out to get a sweet spot.

Thanks for all your suggestions.:thmbsp:

John.

 

[CraigSiR]

I've been using the Aurdalex Gamma under my table. I had two of these from my band days. I was looking at all the options out there, and then thought these might do the job. I used them under my bass cabs. I'm very pleased with the performance, and they are not a ton of money.

http://www.auralex.com/sound_isolation_gramma/sound_isolation_gramma.asp

 

[leepal]

I played some more records yesterday, Tina Brooks,Floyd, Etc.

The sound is so clean, I have no other way to describe it. Words are clear as if they were here in the room. And my room is not really set up for playing music speaker location wise, I have to Balance it out to get a sweet spot.

Thanks for all your suggestions.:thmbsp:

John.

I'm interested in trying this with my TT, what are you using as the 'feet' under the wooden board?

 

[jleon92f]

I'm interested in trying this with my TT, what are you using as the 'feet' under the wooden board?

They are door stops from HomeDepot @2.99 for (2) only come in white though. I may change these to cones later$$. Cost was an issue with my decision. The whole project cost $13 in materials plus my time.:thmbsp:

Thanks,
John.