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Re:Linkwitz transform 11 years 9 months ago #1063

  • knuisje
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Hi Kamikaze,

First you have to determine the f(0) and Q(0) for your box. The spreadsheet in this link can help you, assuming you have a closed box. In the tab "box" you fill in your parameters Fs, Qts, Vas and Vb. The spreadsheet calculates the Qtc [= Q(0)] and Fsc [= f(0)]. With your parameters these are 0.57 and 36.6Hz.
Now determine the desired Q(p) and f(p) and use the spreadsheet in this thread to calculate the biquad coefficients.

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Re:Linkwitz transform 11 years 9 months ago #1064

  • KAMIKAZE
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Hi knuisje,

Thank you for answer. As I understand, final Q(p) must be 0.5-0.7? and F(p) as lower as better? Can you please give some example with it(with calculated biquad's), maybe I do not really understand this. Thank you in advance.

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Last edit: by KAMIKAZE.

Re:Linkwitz transform 11 years 9 months ago #1065

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Kamikaze,

please read the article linked in my previous post on how the Linkwitz transform works.

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Re:Linkwitz transform 11 years 9 months ago #1069

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Ok, I think all done.
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Last edit: by KAMIKAZE.

Re:Linkwitz transform 11 years 9 months ago #1070

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and xls calculations

p.s. can't attach image. here is the link rghost.ru/2624222

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Last edit: by KAMIKAZE.

Re:Linkwitz transform 11 years 9 months ago #1118

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I added some tabs for LPF, HPF, BPF and APF calculations based on the cookbook formulas. Also included are the coefficients for a RIAA correction.

Edit: Added are the remaining cookbook filters (BPF1&2, notch, PeakingEQ, lowshelf, highshelf). Also added approximation plots of the phase and group delay for the APF.
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The following user(s) said Thank You: CharlieLaub

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Last edit: by knuisje.
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