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RE: While you are probably right for a laminated panel

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In Reply to: RE: While you are probably right for a laminated panel posted by hella356 on October 06, 2012 at 12:59:54

I think You misunderstood me slightly.
The stators of the Acoustat are bowed because of the tension of the stator wires. Not by the membrane.
Heat shrinking a membrane is the WEAKEST way of tensioning a membrane!
That is why I thought that they got additional tension because that the membrane stretches a bit more when the bowed stators are mounted together to 1 straight unit.
One should know that it is wasted work to mechanically stretch a membrane and then have it heat "treated"!
It will INSTANTLY loose the tension to the factor of the heat tension.
It's another thing if You heat treat it at the same time as You tension it!. But in that case You will need a rig that Quad uses.
And why they do this is another story. :)

The one who succeeded was the one who didn't know it was impossible.

Edits: 10/06/12

Follow Ups:

read this - Penguin 18:48:18 10/07/12 (7)
it may shed some light
True terror is to wake up one morning and discover that your high school class is running the country.

quote by Kurt Vonnegut
- http://www.soundlabowners.com/articles/heat/index.html (Open in New Window)
- RE: read this - JLindborg 21:39:50 10/07/12 (6)
  Thanks but I already knew this. But not that it covered Soundlab speakers.
  
  The one who succeeded was the one who didn't know it was impossible.
  - RE: read this - morricab 01:14:18 10/08/12 (5)
    You just can't let go that at least for Acoustats and Soundlabs, correct application of heat is the right thing to do with a sagging panel.
    
    The FACT that there are still thousands of Acoustats still functioning properly after 20-30 years of regualar use should be a telling indicator of the robustness of the design. Many of those have been retensioned by just such an application of heat. Jim Strickland designed the most robust electrostatic speaker in history. Just about every other brand needs a rebuild of some kind after 10 or 20 years. Acoustats just keep going and if they sag there's an easy fix.
    
    Upgrading the passive parts makes them still a world class speaker soundwise as well (far better sounding than any Maggie I have heard...including the 3.7).
    - Bumblebees continued to fly - E-Stat 06:18:13 10/08/12 (0)
      long before *experts* figured out how they did. :)
    - RE: read this - JLindborg 01:21:08 10/08/12 (3)
      Yes!
      It seem that the Acoustats are really robust speakers, panelwise at least.
      I can fully understand that the SoundLabs can handle a simple heat shrink because of their very small sectioned stators. Larger would have made the membrane be too slack and stick to one of the stators.
      Due to the fact of charge/surface area/distance between stator and membrane, I am very curious about the function of the Acoustats. VERY curious!
      If everything works out, I will have a pair of Monitor 4 in the near future.
      
      The one who succeeded was the one who didn't know it was impossible.
      
      Edits: 10/08/12 10/08/12 10/08/12
      - RE: read this - morricab 01:31:48 10/09/12 (2)
        
        In Reply to: RE: read this posted by JLindborg on October 08, 2012 at 01:21:08
        
        I would hold out for a spectra series model as the imaging is much better (no venetian blind effect) and the interface more transparent sounding. OR I would try to get a pair with the dedicated Servo charge amps in good condition (or rebuilt to be all tube).
        
        RE: read this - JLindborg 02:10:44 10/09/12 (1)
        
        In Reply to: RE: read this posted by morricab on October 09, 2012 at 01:31:48
        
        The Monitor 4 I have tracked down are the servo version. ;)
        The one who succeeded was the one who didn't know it was impossible.
        
        RE: read this - hella356 12:28:15 10/09/12 (0)
        
        In Reply to: RE: read this posted by JLindborg on October 09, 2012 at 02:10:44
        
        The wide Acoustats with Servos are my favorite, good luck!

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