For what it's worth, unless you only listen to a small collection of records, this is a fool's
errand beyond a point. Most cutting lathes were and are plagued with rumble. The most professional
cutting rooms go to some lengths to isolate the lathes from the building. George Marino at Sterling
Sound (now Ryan Smith's room) had the lathe in a floating chamber within the building. But, there's
plenty of rumble baked in to most records. Also, only bad rumble is a real listening problem on
99.99% of systems because the speakers don't move air low enough to matter. However, feedback from
the speakers is a big problem in vibrant rooms where listening is done loud. There are many
commercial "solutions" to isolation, many of them pure fancy but some based on actual provable
science.
-- Tom Fine
----- Original Message -----
From: "Clark Johnsen" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, June 05, 2015 4:51 PM
Subject: Re: [ARSCLIST] Turntable isolation
> The problem with the inner tube solution (ditto the tennis ball, and so
> on) is that, while they do somewhat isolate the vertical vibrations, they
> do nothing for the lateral. And the lateral plane is where the more, and
> the worse, vibrations happen. Know which of those is more responsible for
> felling buildings during an earthquake? Yeah.
>
> There are a number of commercial products designed to reduce both together,
> ranging from a few bucks to nearly total isolation for $1000. If anyone
> wants to learn more, let me know.
>
> clark
>
> On Fri, Jun 5, 2015 at 2:22 AM, Corey Bailey <[log in to unmask]>
> wrote:
>
>> Hi Don,
>>
>> I'm curious about your use of an inner tube for turntable isolation. The
>> idea makes sense but I have not been happy with my attempts at making it
>> work. The whole system seems too "bouncy" to me at any amount of inflation.
>> I even tried 3 of the smallest inner tubes I could find to increase
>> stability.
>>
>> Perhaps you could share your setup in greater detail. Contact me off-list
>> if you like.
>>
>> Corey
>> Corey Bailey Audio Engineering
>> www.baileyzone.net
>>
>> On 6/4/2015 9:23 AM, Don Cox wrote:
>>
>>> On 04/06/2015, Ron wrote:
>>>
>>>
>>>
>>>> Good idea, tyre tube and "blockboard". Could you please translate
>>>> "blockboard" into American English!
>>>> Thanks!
>>>> Ron Roscoe
>>>>
>>>>
>>>>
>>> Strips of timber about an inch thick, sandwiched between two sheets of
>>> plywood.
>>>
>>> Anything similar will do. At one time I used a concrete paving slab, but
>>> this is too heavy for convenience.
>>>
>>> Regards
>>>
>>>
>>
>
>
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