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12th March 2018, 10:47 AM
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#21 |
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diyAudio Member
Join Date: Jan 2018
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That is not the distortions of microphone at high measurements voltage levels and came from the driver itself. The measurement microphone B&K 4133 has much higher SPL overload level.
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21st March 2018, 06:30 PM
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#22 |
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diyAudio Member
Join Date: Jan 2018
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29th March 2018, 05:53 PM
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#23 |
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diyAudio Member
Join Date: Jan 2018
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The measurements of Peerless BC25TG15-04 have been added:
Peerless BC25TG15-04 | HiFiCompass Very nice tweeter for that price 
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19th April 2018, 11:43 AM
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#24 |
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diyAudio Member
Join Date: Jan 2018
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21st May 2018, 12:49 PM
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#25 |
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diyAudio Member
Join Date: Jan 2018
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28th May 2018, 04:18 PM
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#26 |
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diyAudio Member
Join Date: Jan 2018
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BlieSMa T34B-4 beryllium dome tweeter measurements have been added:
BlieSMa T34B-4 Beryllium Dome Tweeter | HiFiCompass |
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4th June 2018, 10:09 AM
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#27 |
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diyAudio Member
Join Date: Jan 2018
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Audax TW034X0 textile dome tweeter measurements have been added:
Audax TW034X0 1.3" Textile Dome Tweeter | HiFiCompass |
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4th June 2018, 01:49 PM
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#28 |
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diyAudio Member
Join Date: Sep 2007
Location: Australia
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Thanks for the measurements
 Have you considered equalising the response of the drivers to flat (or a reference slope) before running HD sweeps? It would help to make comparisons between drivers with different natural rolloffs. E.g. consider that the BlieSMa T34 is about 6dB down at 1kHz compared to >2kHz, which makes the distortion considerably lower at 1kHz compared to a tweeter which is flat down to 1kHz. Of course it is possible to look at the measurement which is twice the voltage to account for -6dB at 1kHz but I find it more intuitive if the levels are the same at every frequency to begin with, that way you can just open one plot for each tweeter and compare them side by side. Up until now I've only been measuring midrange drivers which are more or less flat over their usable bandwidth so differing frequency responses hasn't been too much of an issue for me, but I'm planning to do woofers and tweeters soon and this seems like a big hurdle in comparing the distortion of different drivers as they near their mechanical resonances. I'm considering perhaps providing additional measurements with tweeters EQ'ed to 1kHz/2kHz LR2 and woofers to 40Hz BW2. The solution seems obvious to me, yet for some reason no one seems to have ever done it. Last edited by TMM; 4th June 2018 at 01:52 PM. |
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4th June 2018, 04:24 PM
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#29 |
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diyAudio Member
Join Date: Nov 2006
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Thank you for the effort and publishing the data!
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4th June 2018, 06:43 PM
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#30 | |
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diyAudio Member
Join Date: Oct 2002
Location: England
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