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<blockquote data-quote="Moble Enclosurs" data-source="post: 7493868" data-attributes="member: 634917"><p>Yes. There is a difference in Fs and other factors before and after break in. Now, I need to clarify, that what the OP is referring to is not for low pass filtering, but for hiigh pass filtering of the mid range to sub crossover frequency. For instance, to find the crossover point of sub and mids, its not the Fs of the sub, but the Fs of the mids, because they operate more in an IB setup or free air setup compared to the controlled gain of a subwoofer enclosure where many more variables exists of greater importance than base frequency. So, if the mids have an Fs of say 60Hz, then for a 24dB/octave should be at the quarter octave point of 75Hz for the crossover. And at 90Hz for a 12dB/octave slope. That was the proper analysis of this basic formula and can obiously be changed depending on listener preference. It is merely a starting point as most general formulas are, but works as a great difinitive solution to any system as it stands.</p></blockquote><p></p>

[QUOTE="Moble Enclosurs, post: 7493868, member: 634917"] Yes. There is a difference in Fs and other factors before and after break in. Now, I need to clarify, that what the OP is referring to is not for low pass filtering, but for hiigh pass filtering of the mid range to sub crossover frequency. For instance, to find the crossover point of sub and mids, its not the Fs of the sub, but the Fs of the mids, because they operate more in an IB setup or free air setup compared to the controlled gain of a subwoofer enclosure where many more variables exists of greater importance than base frequency. So, if the mids have an Fs of say 60Hz, then for a 24dB/octave should be at the quarter octave point of 75Hz for the crossover. And at 90Hz for a 12dB/octave slope. That was the proper analysis of this basic formula and can obiously be changed depending on listener preference. It is merely a starting point as most general formulas are, but works as a great difinitive solution to any system as it stands. [/QUOTE]

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