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thoghts about isolation.

Our discussion has to take place with mechanical isolating non-source components such as amplifiers and preamps.

My thought was wether we realy need to mechanically isolate non-source components or not. The impact from internal vibrations caused by the mainly power supply transformer will less-likely affect the operation of active elements fo the circuit such as tubes or transistors imo. The same thing comes onto mind about passive elements such as resistors and capacitors. What can affect the performance is the electrical isolation of power transformers especially in the power amplifier domain(that's why I prefere not using integrated amps). That's why it's very often beneficial to have an outboard power supply(not necessary battery) for the preamplification(phono, line or DAC)

I want to give some example where I've seen the PS300 power plant placed on the tip toes and I wonder why?

If we take source components, there are certainly good reasons for it such as mis-recepting the laser beam by CD transport or mis-tracking the record that can even be cause by the measurable amplitudes. In addition for the turntables the amplitude of a signal can somehow be matched and certainly cannot be neglected with amplitude of intermal vibrations caused by friction of a platter, motor that is transfered to the tonearm and cartridge as well.

IF YOU'RE LAZY TO READ THE WHOLE THING YOU CAN ANSWER JUST THIS GENERAL QUESTION:

Do all audio components need to be mechanically isolated?
128x128marakanetz
ozfly
887 posts
 
I'm laughing so hard at myself right now that I thought others could enjoy a good chuckle too. I've been so focused on researching isolated circuit power delivery that I interpreted Theaudiotweak's comments as transferring spurious energy to "electrical" ground. How in the heck did I miss technology like that? Now I get it ...
At the same time, I had always thought cones were isolation devices rather than energy transfer devices so, as usual, these conversations open up yet another world for me to explore. Thanks for the response Bob!! I'm still laughing.
killerpiglet
373 posts
 
Theaudiotweak, I am interested in thsi remark:
"There are products that collect spurious noise, those generated both internally as well as externally and speed their exit to ground."

Can you elaborate? I have hum/RFI issues.

KP
redkiwi
1,092 posts
 
Audiotweak, if a platform dissipates energy, then would it not be inappropriate to regard it as providing some isolation?

If the only changes are amplitude and frequency, then if a platform reduces the amplitude of the energy, might it not be inappropriate to regard it as providing some isolation?

I have never seen the term isolation as an absolute term, but a relative one. Perhaps that is the issue?

Devices that change the frequency of a vibration tend to do so by having a very specific resonant frequency of their own. As such they tend to add more of a problem than they take away.
mdomnick
331 posts
 
Killer...check this product out...

http://www.shakti-innovations.com/

Its refreshing to see companies post actual test lab results in this world of snake oil sales. I have not used any shakti products, but certainly intend on trying them soon. If any one else has used them, please let me know what you think.
theaudiotweak
1,793 posts
 
Imagine just for a moment ladies and gentlemen,that your son or daughter or some other special loved one was playing at a cello recital. Imagine that your loved one ,who trained for so long, and who was so dedicated and was so gifted, was required to place and then play their cello on a leaded base,or a kids sandbox,or a inner-tube or place upon it a leaded piece of wood or how about a stone.Your loved one would probably be disappointed with the texture and dynamic character they had trained so long to convey, from their selves and then on to their audience.
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