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I cant reach above 15Khz on my planars
I cant reach above 15Khz on my planars
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Old 30th April 2017, 09:33 PM   #11
WrineX is offline WrineX  Netherlands
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Quote:
Originally Posted by anji12305 View Post
You know more than any 10 of us.
Well i realy really doubt that!!

i got some other ideas to, swap out the foil for some relaxing microwave foil see what happens and maybe damp the mylar in between without Upping the resonance or it wont go as low, and last but not least maybe poke some holes in between the traces >? i will lose some ouput i guess but hell try it anyways.


Aah a capo, never knew that was called a capo. well this would result in higher resonance. i could get the same result by tensioning them more. something i will try by tensioning them while playing some nice whitenoise and look at the spectrum to see what changes.

Thanks m8 for the input !
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Old 30th April 2017, 09:34 PM   #12
WrineX is offline WrineX  Netherlands
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Quote:
Originally Posted by irribeo View Post
You only need to show 20kHz, no need to actuallly reach 20kHz, sorry, don't want to offend people Do a measurement that shows 20kHz unattenuated somehow
that would be cheating i know it is silly since i dont hear it but i want it to be there
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Old 30th April 2017, 09:45 PM   #13
irribeo is offline irribeo  Netherlands
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I understand ! But bent just for money, if you like
I like your videos, but being from US I have to say: stop smoking in public
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Old 30th April 2017, 09:48 PM   #14
WrineX is offline WrineX  Netherlands
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:0 i wont bent for money But thanks !!

yeah about the smoking, there are only 2 videos i do...... i banned myself from smoking inside since my place started smelling like old people house and i nearly burned it down the last time in the quad video
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Old 1st May 2017, 08:26 AM   #15
Calvin is online now Calvin  Germany
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Hi,

comparison ML panel with 12Ám film and my panel with 3.5Ám from 2006.
Mass related amplitude drop is clearly visible.

jauu
Calvin
Attached Images
File Type: jpg ESL-Prodigy Vergleich.jpg (73.7 KB, 117 views)
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Old 1st May 2017, 02:41 PM   #16
WrineX is offline WrineX  Netherlands
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Quote:
Originally Posted by Calvin View Post
Hi,

comparison ML panel with 12Ám film and my panel with 3.5Ám from 2006.
Mass related amplitude drop is clearly visible.

jauu
Calvin
THX CALVIN, probable has something to do with it but as you can see it drops pretty rapidly in my planars, so i guess there are 2 things playing a role at the same time. and one of them is keeping this mass loading in the shadows. since whatver i try i get this steep roll off even when lowering foil weight.
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Old 1st May 2017, 05:08 PM   #17
bolserst is offline bolserst  United States
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The steep roll-off is likely due to something in your measurement setup rather than diaphragm mass.
Roll-off due to mass is -6dB/oct as shown in Calvin's data. (attachment #1)
My comparison plots for different diaphragm mass were posted here:
http://www.diyaudio.com/forums/plana...ml#post3427260
http://www.diyaudio.com/forums/plana...ml#post3610816

The roughly -12dB/oct slope looks to be the same in all your posted data.
Attachments #2 - #5 show your current ribbon data, and some ESL data you posted in another thread.
This slope is typical of microphone roll-off above the capsule resonance.

Q1: do you have calibration data for your microphone, and using it?
Q2: can you get access to and measure an XT tweeter?
They have flatish response out to 40kHz, so could be used to verify your measurement setup.
Attached Images
File Type: png ESL_Calvin_HFrolloff.png (368.8 KB, 102 views)
File Type: png ESL_Wrinex_HFrolloff_Ribbons.png (421.9 KB, 100 views)
File Type: png ESL_Wrinex_HFrolloff_ESL_01.png (207.3 KB, 85 views)
File Type: png ESL_Wrinex_HFrolloff_ESL_02.png (239.4 KB, 85 views)
File Type: png ESL_Wrinex_HFrolloff_ESL_03.png (201.0 KB, 25 views)
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Old 1st May 2017, 05:54 PM   #18
WrineX is offline WrineX  Netherlands
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Quote:
Originally Posted by bolserst View Post
The steep roll-off is likely due to something in your measurement setup rather than diaphragm mass.
Roll-off due to mass is -6dB/oct as shown in Calvin's data. (attachment #1)
My comparison plots for different diaphragm mass were posted here:
http://www.diyaudio.com/forums/plana...ml#post3427260
http://www.diyaudio.com/forums/plana...ml#post3610816

The roughly -12dB/oct slope looks to be the same in all your posted data.
Attachments #2 - #5 show your current ribbon data, and some ESL data you posted in another thread.
This slope is typical of microphone roll-off above the capsule resonance.

Q1: do you have calibration data for your microphone, and using it?
Q2: can you get access to and measure an XT tweeter?
They have flatish response out to 40kHz, so could be used to verify your measurement setup.
damn bolserst i kind of hoped you would chip in yeah about what you say it does remind me of the posts i made about the stacked ESL they had some weird rolloff as well, back then we thought it was the amounts of menbrames and weight.

about the mic, i got a UMIK with calibration file, and also got a home made uncalibrated panasonic based capsule. wich i think might be the same as in the umik. if i swapp them out they are almost the same. i do use the calibration file here it is as attachment.

And here a clean measurement of a simple esl i used 2 different amps both match 100% if i change out to external soundcard or change laptop results are exactly the same.


If this mic is screwing me over that would be something.... i discarded sooo many designs based on this ****



the rise of the esl should extend further but decides to drop at ...... 15 khz.. 1 micron foil is used btw
Attached Images
File Type: png esl drop.png (31.3 KB, 35 views)
Attached Files
File Type: txt UMIK CAL FiLE 7003212.txt (10.4 KB, 4 views)
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Old 1st May 2017, 06:10 PM   #19
WrineX is offline WrineX  Netherlands
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here a amt that did reach 20khz, although when skipping trough all measurements more often it stops at 15khz then not.

could them mic degrade in any way > ?
Attached Images
File Type: jpg 20 khz (Medium).jpg (233.7 KB, 36 views)
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Old 1st May 2017, 06:17 PM   #20
WrineX is offline WrineX  Netherlands
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Bolserst

you mean like this tweeter from Vifa?

http://shop.speakerenco.nl/content/i...4%20Rev1_0.pdf
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