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Multi-Way Conventional loudspeakers with crossovers

Introduction to designing crossovers without measurement
Introduction to designing crossovers without measurement
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Old 3rd December 2019, 12:37 AM   #741
Denri is offline Denri  Russian Federation
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Join Date: Feb 2019
Location: Moscow
AllenB

I really like this topic and curious about one question.

First pages are covered first order filters and partly touches the second order filters for woofers at least.

But nothing said about mixing of different order crossovers.

I read some articles for car audio systems where used second order filter for woofer\low pass part of crossover while first order for tweeters. ( or vise versa for woofer tweeter )

What are drawbacks here in such designs?
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Old 3rd December 2019, 12:58 AM   #742
AllenB is online now AllenB  Australia
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An important reason why first order for woofer and second order for tweeter is a good combination, is because when you plot acoustic phase vs frequency, the plot winds faster for a higher order rolloff.

Now, the sound from the woofer usually arrives later than the tweeter. Maybe an easy way to explain this is that the woofer voice coil is usually set back a couple or a few cm from the tweeter because the woofer is larger and goes further back into the cabinet. This has the effect of winding the phase faster vs frequency.

So, it's about making them meet up better in the end.
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