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Yea, I remember reading about about CLS % elongation on mylar (tensioned length-wise only), but I do not believe it was from ML.... I guess I can make a few panels with different tensions and run some REW tests...or just build a DIY deflection meter like you did...problem is the only real...

Yup, prolly same reason Chevrolet had a 60,000 mile design life on the Vega. Planned Obsolescence - i.e. More Sales / Money? I will start a separate thread on my rebuild....do not want to clutter up this thread...just one more question - what is target mylar tension on a CLS? I have never been...

Interesting... The coating Quad used also are near bulletproof, but may not be as durable as Acoustat... Acoustat's coating is very thick compared to Quad, ML, etc. I saw old pics from Acoustat showing them applying the coating with what looked like a paint roller...we talk of ML panels...

The ML Panels have an infused coating that charge up the panels, but this coating will deteriorate over many years. Another problem I see with ML panels is as the panels get old, they separate along edges. The Bias Ring - basically a copper tape that is connected to the red bias wire that is...

For strictly desktop use, I have always used these Monsoons (discontinued). The panels are Eminent Technology type Push-Pull planar magnetic transducers. Actually, they may be licensed directly from ET when they were sold years ago. People were buying up these units just for the HP transducers...

Yup. I personally know of a Quad ESL-63 that suffered this fate....a friend preferred to plug his Quads into a switched room light outlet to save energy (even tho leaving them plugged in all the time only consumed milliwatts). His wife wanted to listen to some music one day while he was out, and...

The ability for an ESL speaker to continue playing after AC power is removed is sign of a healthy panel. Be happy. But driving ESL panels with very low or no charge on them will damage your step up transformer and / or amplifier.

I visit Champaign / Urbana somewhat frequently (Alma Mater). Next time I get down there I will give you a shout...if you still have them. Thanks

Where in Wisconsin are you? I m in Chicago and may be interested in a few ESL experiments...

Sanders' opinion is to have an amp that has all the power needed for any music peaks not to clip. I have the Sanders Kaya amp - converted to full range. I only use it for very difficult ESL loads, like my Acoustats.

HiFiShark.com Lists current and sold items...just plug in your search.... Works great.

The back plane that has two circuitboards in that ebay pic, the upper circuitboard is the ICEPower 200ASC amp board that powers the woofer. The Crossover board below gets power from the ICEpower AUX supply connection... sounds like you swapped the ICEPower boards and confim they both work? I...

Leporello - Found it - from Audio Amateur 1976...if you choose to try - use discretion as very dangerous.

Lowheat - I find 8417 tubes from friends at DIYAudio or Reverb. Every now and then from ebay. I stay with the more rare / reliable / better Sylvania (and Bogen labled) 8417... I always have the stipulation with seller that when received, I test on my tester....if not OK, I reserve the right to...

All this talk of direct driving ESL panels...no step down to step up transformers...search Sanders (Innersound, not ML) White Paper on direct driving ESL from plates of a EL34 tube amp...I have it somewhere, I will post when I find it... But I bought a kit from a company in Germany (Shackman)...

If they charge quickly, its healthy panels... You should know - by driving ESL speakers with bias disconnected & near drained, you risk destroying both your amp (driving a dead short) and / or step up transformers in interface...neither are a cheap fix...

That Nak Stasis has plenty to drive the panels - your good here...but should not take longer than a few hours to fully charge the panels... I would think... Sux that ML never put in a Neon Charge lamp like the Quads have - shows the health of the panels...I actually built one from the...

Just make sure the Soap has Sodium Lauryl Sulfate...some soaps do not have this... I have separated three sets of CLS panels many years ago. Two sets were destroyed...not easy, but can be done...

When transporting the CLS Speakers to your home, were the interfaces (metal box on speaker) disconnected from speaker frame? If so, when reassembling the speaker did you reconnect the three wire connector from panel to the interface? Be very careful when doing anything inside the Interfaces. Do...

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