30 years on...

It means (in this context) that it can or will intensify and prolong any vibration applied to it (via air or structural) thru sympathetic vibration.

As for when it is bad, that would depend on the particular design in question.



James, maybe for the LP12 naysayers you could explain how a Ninja differs from an original spec LP12?

 

Yes, thank you. Not very well, though.

 

It's a secret, and it won't help the "naysayers", but ... the top plate is replaced with a thicker one, without a cut-out for the switch (see photo) and there's an extra bolt, which you can see, the motor is relocated and there are a few other little tweaks here & there as well. Obvious stuff - there's not much in there to modify.

 

So, the resonance argument is fairly acedemic as the top plate will have a different resonant frequency to standard, amongst other things.

Kind of makes the first post in this thread pointless.

 

It all looks logical. Why didn't Linn, Stereophile's all-time greatest company, think of it themselves?

 

This thread is about the LP12, not the "Ninja".

 

At what frequency and in what direction? How does vibration in the plinth get to the stylus?

The most obvious resonance in the LP12 is the suspension. The stronger you make this resonance the better the TT works. When the subchassis was upgraded from a spot welded reinforcement to a glued one it developed a ring.

Paul

 

Re-read what i said, it depends on the particular application, selective quoteing is a tad silly.

Also re-read the thread, it was not me that mention plinth vibration getting to the stylus.

I imagine it would get there, if it did, by means of energy transfer.

 

Now you're just taking the piss. 'Energy transfer'. Did you write for Star Trek?

FWIW if 'vibration' in the plinth does not get to the stylus, why care about it?

Paul

 

Hi,

'When the third repetition occurred. -

It felt that, in spite of all possible pains,

It had somehow contrived to lose count,

And the only thing now was to rack its poor brains

By reckoning up the amount. -

"Two added to one- if that could but be done,"

It said, "with one's fingers and thumbs!"'

(from the hunting of the snark)....

'But much yet remains to be said. -

"In one moment I've seen what has hitherto been

Enveloped in absolute mystery,

And without extra charge I will give you at large

A Lesson in Natural History."'


No matter how you link the subchassis to the plinth

If the plinth vibrates the subchassis will too,

in a lesser degree, how much remains to be said.

Hence, you are worrid about the vibrations in the Plinth and what you site an LP-12 on is quite relevant to how it sounds. If the suspension where effective, you could site it as you like with no audible change.

Anyway, again this is still basic newtonion physics, no involvement of voodoo or anything supernatural, paranormal or suprasensual.

I remain astounded how people can adopt and attempt to defend positions unsupportable to anyone versed in sixthform physics.

Ciao T

 

And the same goes for every turntable in existence. I'm quite happy for you to nominate an uber-deck which will beat my LP12, on a level support of my choosing.

[I choose the top of one of my speakers.]

 

Hi,

Rockport Sirius III. Sadly your speakers may not be either large nor solid enough to accomodate that one. Of course, the Sirius includes an active air suspension and weights in at a fighting weight of 550lbs.

Andy did a most convincing demonstration of proper turntable design combine dyour methode of turntable evaluation and that of penance by playing the record (which BTW sounded excellent) and at the same time KICKING the plinth of the turntable, with no resultant audible or visible effects.

How about you play a record and kick your Ninja while playing a record to demonstrate it's equally proper engineering?

L8er T

 

Me too.

But this is both a statement of the obvious and a gross over-simplification. Pre Sixth Form level, I think. It could be restated as 'No matter how you link any part of a turntable to any other if one vibrates the other will too'. Not really a great insight into how to build a practical turntable.

Paul

 

Maybe your just pissed?

Which part of the 2 simple words did you fail to grasp?

 

What's "sad" about that?

"Energy transfer", penance, now come on!

 

Vibration - a form of energy
If one item vibrates and causes another to vibrate....

How would you describe it?

 

Bub doesn't like TT knocking or kicking and restricts himself to rack stroking.

 

It's reassuring to know that if I ever wanted to take up martial arts training, using my TT as a sparring partner, the Rockport "Serious" is available.

How much is the Rockport, is it in the same price bracket as the LP12?

 

Sounds interesting, this Rockport Sirius III. The designers had to build it to withstand someone kicking it? Does it really sound that bad!