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Old 3rd March 2013, 12:20 AM   #21
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Bils Distortion Isolation also works with music as stimulus :
Distortion Isolation in the Time Domain
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Old 3rd March 2013, 12:21 AM   #22
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You can put the undistorted music on one channel of a headphone and the distortion residual on the other channel.
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Old 3rd March 2013, 12:23 AM   #23
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Joachim,
I haven't yet subscribed to Linear Audio but intend to this month. I would love to read about this test. I am like you not interested in commercially available speakers, I have yet to measure one that I would use, that and the fact that I am developing my own. I really think you would like what I am doing, it is many years of gathered information and no corners are being cut in the name of costs. I had to develop my own cone material and magnetic circuit to do what I am doing and now I am being challenged by a co-developer to do the same with a new spider material development. Trying to get away from the Phenolic cloth spider phenomena of having a constantly changing value over time due to the micro cracking of the phenolic.
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Old 3rd March 2013, 12:41 AM   #24
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Good luck. Designing speakers you can not learn. You have to be born for it.
By the way my test can be used with electronics too so back on topic.
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Old 3rd March 2013, 12:43 AM   #25
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Thank you for the link to the article on the distortion measurement. I appreciate it and am printing it out to read as I write.

ps. How are your speaker enclosures working out, they were very impressive the way they looked?
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Old 3rd March 2013, 12:47 AM   #26
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The Satoris ?
I listen to them all the time. I am very happy with the performance of the cabinets.
They are light weight, stiff and well damped.
I am not a fan of heavy weight. There is something wrong in the sound. For me it sounds like energy storage. Like " OUMPF; OUMPF; OUMPF".
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Old 3rd March 2013, 12:52 AM   #27
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Yes,
I would guess that a heavy mass material with thick cross-section would have a longer time constant to dissipate the stored energy, rather than the opposite lower mass thinner section that would have a much quicker energy dissipation and less storage of energy.
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Old 3rd March 2013, 01:00 AM   #28
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I also think that a super heavy cabinet brings a lot of sound back through the cone.
To damp the internal sound or convert it totally into heat is an illusion. I measure 140dB inside a cabinet when i measure 90dB before the cone from the outside.
Hell breaks loose inside a cabinet.
You can of cause use metal or other very heavy cone materials but then sensitivity goes down the drain. I would say the less damping the better provided that the linearity of the frequency response is not compromised. I hate a sound that is hollow or nasal.

Last edited by Joachim Gerhard; 3rd March 2013 at 01:04 AM.
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Old 3rd March 2013, 01:02 AM   #29
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Conventional crossovers have a lot of energy storage too. It does not come easy.
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Old 3rd March 2013, 01:04 AM   #30
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Here is a classic :
Stored_energy_2
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