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Old 20th May 2012, 12:28 AM   #21
AllenB is offline AllenB  Australia
diyAudio Member
Join Date: Oct 2008
That reminds me of something, PLB By the way the filter target I used above (red) was 24dB/oct and it would have been possible for a range of others.

Aiming for the lowest reaching notch effect, first order filter and the freedom to adjust any component, the 11F cap was always the correct value regardless of the notch frequency. When I found the lowest notch frequency that worked properly, it turned out to be the tweeter's resonance frequency. Coincidence? Maybe...but the plot of impedance with just the notch is interesting.
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