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Multi-Way Conventional loudspeakers with crossovers

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Old 20th April 2004, 03:33 PM   #11
Ken L is offline Ken L  United States
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Join Date: Sep 2002
Location: deep south
Default Still thinking about this _big grin_

Question Please Sreten?


Quote:
Originally posted by sreten



Your procedure is effectively phase aligning the
drivers at crossover not time aligning them.

So phase worries are not an issue .

sreten.
I understand what you are saying - my question is -

Assuming that there are several physical points at which the drivers are in phase -

If the drivers actually become time aligned -

Wouldn't the point of Time alignment also be the point of _deepest_ null?

Just trying to make sure of this -

Thanks for your input.

Regards

Ken L
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Old 20th April 2004, 05:51 PM   #12
sreten is offline sreten  United Kingdom
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Join Date: Nov 2003
Location: Brighton UK
Default Re: Still thinking about this _big grin_

Quote:
Originally posted by Ken L
Question Please Sreten?

I understand what you are saying - my question is -

Assuming that there are several physical points at which the drivers are in phase -

If the drivers actually become time aligned -

Wouldn't the point of Time alignment also be the point of _deepest_ null?

Just trying to make sure of this -

Thanks for your input.

Regards

Ken L
It depends how you define time aligned.

However phase alignment of the crossover implies you try
the tweeter out of phase and use the the point will a null
that has the lowest apparent acoustic centre offset, for
minimum phase change through the c/o region.

With a first order crossover it depends how well the drivers
own phase shifts have been accounted for as to whether
the drivers will actually be time aligned.

With non symmetrical crossovers, and acoustically nearly all
are even if they are electrically symmetrical, the point of best
phase alignment is not the point of equal acoustic delay
from each driver in their passband away from the c/o region.

A good crossover designer exploits this to allow offset drivers
on a flat baffle to have near perfect phase alignment.

sreten.
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Old 20th April 2004, 10:12 PM   #13
Ken L is offline Ken L  United States
diyAudio Member
 
Join Date: Sep 2002
Location: deep south
Default Re: Re: Still thinking about this _big grin_

Quote:
Originally posted by sreten


It depends how you define time aligned.

sreten.
Thanks for your response, Sreten.

I've still got a lot to learn about this stuff _grin_

Best regards

Ken L
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