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AA vs. AL crossover: driver polarity


slk23

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Can anyone explain why the AL crossover in my La Scala speakers reverse the polarity of the squawker and tweeter?  The AA, which I believe was also used in the La Scala, doesn't change polarity.  Is it because of a phase shift in the AL that isn't present in the AA?

 

AL:

Type AL21.jpg

 

AA:

Type AA.jpg

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