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Thread: My DIY stats

  1. #11
    Join Date: Jan 2009

    Location: Essex

    Posts: 16,452
    I'm openingabottleofwine.

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    Panel speakers are dipoles, sub woofers have a monopole polar distribution, so it is very difficult to integrate the two. The Bowers & Wilkins DM70 electrostatic hybrid suffered from this problem.

    I once heard Audiostatic speakers at an audio show (can't remember the model) and was very impressed. Curiously the room was empty, so I could sit in the optimum position, have the system to myself and spent some time enjoying the music. In fact music was the sole topic of discussion with the Audiostatic rep - always a good sign.

    Congratulations Johan on your DIY electrostatics. I knew a collegue who built himself a pair of electrostaic speakers based on the Ed Saunders series of articles in the Audio Amateur magazine. They weren't easy to build, but he persevered and eventually was successful. Me - I'm happy with my Quad '57s, but I take my hat off to you for building your own. Well done!

    Did you wind your own transformers or did you use commercially available items? What value of turns-ratio did you use?
    Last edited by Barry; 07-12-2016 at 08:59. Reason: Addition
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  2. #12
    Join Date: Sep 2016

    Location: The Netherlands

    Posts: 43
    I'm Johan.

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    Hello I would like to thank everyone for the kind words!

    I'm currently in the process of building the new, bigger stats, but I'm only at about 1/4 progress. I will soon post a photo In the meantime, I enjoy the current stats, they still do well.

    Regards

  3. #13
    Join Date: Sep 2016

    Location: The Netherlands

    Posts: 43
    I'm Johan.

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    Hi everyone,

    although I didn't visit this place for a while I still like it In the meantime I made some progress on my new stats: tomorrow I plan to attach the membrane to the first new stat. I feel excited as it took me a few months to build just one stat, but I think it's rather big - although I'm getting used to it's size. It's still "do-able" in my opinion. It's just a little smaller than an average door. I will test one stat first before building the second one. As soon as the first stat is assembled I will post a photo!
    Last edited by j.postema; 10-11-2016 at 12:29.

  4. #14
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 30,068
    I'm Geoff.

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    We will certainly be looking forward to seeing your work Johan.
    Mr. Tact!

    Main system: MMs/ADCs/Low output MC's/One rare Japanese SUT/One scarce British phono stage/various tonearms/hefty Japanese DD TT and hefty Japanese BD TT and small British BD TT. 4 CD players/2 jitter buster/2 DACs/Valve buffer. TVC stepped attenuator or valve pre-amp or solid state pre-amp. Current dumping power-amp or either of two Class A SS power-amp or Class A EL34 valve monos or big Japanese (part Class A) integrated. Big dual concentric speakers/Smaller dual concentric speakers/Two way British compacts and full range speakers, amongst others. And too much more to list!

  5. #15
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 38,474
    I'm Grant.

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    Seen a big one before but not heard it. told they can sound super.. good luck, and some pictures will be appreciated
    Regards,
    Grant ....

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  6. #16
    Join Date: Jan 2008

    Location: Forest of Dean, Glos & Cambrian mountains, Wales

    Posts: 9,194
    I'm Jerry.

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    This is a very interesting project - I love big stats.

    Keep the photos coming!
    Jerry

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  7. #17
    Join Date: Sep 2016

    Location: The Netherlands

    Posts: 43
    I'm Johan.

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    Hi,

    about two weeks ago I finished my first bigger stat. It was interesting to turn up the volume and it just sounded well No technical problems. So I as very happy, also initial sound quality impression was good. But after some extensive listening I concluded that bass was not tight and mid range frequencies sounded a bit smeared / dull.

    I think I need do damp resonance frequency and I think (hope) that wil solve the problems. But I'm still quite satisfied with the restult. The photo shows both the first project (small stat) and the new project (big stat). I'm expecting to finish the second big stat in just a few days so I can listen in stereo. (at the moment I combine the small and big stat for stereo)


  8. #18
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 30,068
    I'm Geoff.

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    You do some great looking work Johan.
    Mr. Tact!

    Main system: MMs/ADCs/Low output MC's/One rare Japanese SUT/One scarce British phono stage/various tonearms/hefty Japanese DD TT and hefty Japanese BD TT and small British BD TT. 4 CD players/2 jitter buster/2 DACs/Valve buffer. TVC stepped attenuator or valve pre-amp or solid state pre-amp. Current dumping power-amp or either of two Class A SS power-amp or Class A EL34 valve monos or big Japanese (part Class A) integrated. Big dual concentric speakers/Smaller dual concentric speakers/Two way British compacts and full range speakers, amongst others. And too much more to list!

  9. #19
    Join Date: Sep 2016

    Location: The Netherlands

    Posts: 43
    I'm Johan.

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    Thanks!

  10. #20
    Join Date: Jan 2013

    Location: Bristol

    Posts: 3,402
    I'm Justin.

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    If you have panel resonances you cannot avoid you can just notch them out digitally with a high Q value and a deep (say 10DB) cut. Provided you know at which frequency(s) they occur at. The idea is to apply a very narrow deep attenuation at the target frequencies.

    Truth be told there are plenty of speakers that resonate badly at certain frequencies panels or not, that could almost certainly benefit from this.

    Do you have any construction pics? Where did the plans come from?

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