stacking crossovers

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mcaudiothompson

Member - Posts: 6

Joined: March 06, 2005

Location: Canada

Posted: July 24, 2005 at 11:33 AM / IP Logged

hey guys. how do i figure out what slope/freq i end up with if i run a signal through 2 x/overs(active).ie:two 18/db per oct set at 80hz will get me ?slope at ?freq.

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DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: July 24, 2005 at 12:49 PM / IP Logged

Cascading two crossovers in series is generally a bad idea due to group delay, level matching issues and phase changes resulting in unpredctable bumps or dips at the crossover frequency and an introduced time-delay in your sub in relation to the rest of the system. But if everyting is perfectly matched, you will end up with 18db/oct at 80Hz.

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JAydawg21

Copper - Posts: 51

Joined: July 01, 2005

Location: United States

Posted: July 25, 2005 at 12:49 PM / IP Logged

DYohn wrote:

Cascading two crossovers in series is generally a bad idea due to group delay, level matching issues and phase changes resulting in unpredctable bumps or dips at the crossover frequency and an introduced time-delay in your sub in relation to the rest of the system. But if everyting is perfectly matched, you will end up with 18db/oct at 80Hz.

How would he end up with the same filter if he cascades 2 of them? I haven't done much study on active filters so i dont really know what type of signal manipulation they do to achieve their band width. I can see signal delay but logically i feel like cascading would end up with a steeper slope as it is with pasive crossovers. Whats the story??

'97 Jeep Cherokee sport

subs: JL 12w3v2 : RF 500a2 :

RF 1F capacitor

doors: 6" Diamond D361i -> RF 200a4

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stacking crossovers

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