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Old 19th March 2014, 12:53 AM   #1
adason is offline adason  United States
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Default Betsy impedance plot

I searched and searched and found none. Can anyone tell me why are there no impedance plots with frequency response graphs for Betsy on Wild Burro Labs page?
I found none on diy forum either, except perhaps one in Karlson, which is not relevant for me. On other forum I found link, but it did not work.
Thanks, ed

Last edited by adason; 19th March 2014 at 03:02 PM.
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Old 19th March 2014, 04:25 AM   #2
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1. I don't have a decent/professional measurement system.
2. I still provide more data than pretty much any other fullrange driver mfg.
3. This is the first comment I've heard someone request it, and being a hobbyist it hasn't been a priority.
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Old 19th March 2014, 06:30 AM   #3
GM is offline GM  United States
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Yeah, 'slim pickins'.........

GM
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File Type: jpg betsy wow on axis.jpg (85.4 KB, 124 views)
File Type: gif betsyksolderz.gif (71.6 KB, 123 views)
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Old 19th March 2014, 02:30 PM   #4
adason is offline adason  United States
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thanks for replies

d to the g, my post was not to critisize your lack of measurement system
my interest is in flattening the impedance peak
some report lowering the distortion, as you have probably seen in the posts about current drive

GM, thanks! that is very useful, second graph that is, first one is my own fr response measurement of betsy-wow
I wonder why I missed that second plot, I searched everywnere
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Old 19th March 2014, 04:57 PM   #5
adason is offline adason  United States
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the rising impedance from 300Hz up can be easily flattened by a zobel
when it comes to 60Hz impedance peak, can anyone provide formulas to calculate RLC filter?
So far I found the ones on Elliots page...I will give it a try
Passive Crossover Network Design
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Old 19th March 2014, 05:01 PM   #6
adason is offline adason  United States
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just a teaser...they are not finished, neither cosmetically, nor the crossover...this is what I am working on
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Old 19th March 2014, 05:25 PM   #7
GM is offline GM  United States
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Quote:
Originally Posted by adason View Post
GM, thanks! that is very useful, second graph that is, first one is my own fr response measurement of betsy-wow
I wonder why I missed that second plot, I searched everywnere
You're welcome!

Oh well, that's what happens when one just saves without taking the time to document the 'who/what' of it.

Dunno unless it's because it's for the 'K'............ Then again, it's one of Freddy's, so he may have sent it to me as we once did a fair amount of audio 'bench racing' via email.

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Old 19th March 2014, 05:50 PM   #8
GM is offline GM  United States
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Quote:
Originally Posted by adason View Post
when it comes to 60Hz impedance peak, can anyone provide formulas to calculate RLC filter?
Some to compare: Series Notch Filter Designer / Calculator Help
Series Notch Fliter Designer / Calculator

GM
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Old 19th March 2014, 06:58 PM   #9
adason is offline adason  United States
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Thanks again GM.
The numbers I am getting for capacitor and inductor are quite big...nothing I can do about it, I guess.
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Old 20th March 2014, 04:50 AM   #10
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Sweet speakers!

and thanks GM!
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