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Author Topic: Unused subwoofer shorting  (Read 927 times)

Gordon Brinton

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Re: Unused subwoofer shorting
« Reply #20 on: March 12, 2020, 03:37:46 pm »

The outdoor test was done with the test mic laying on a piece of plywood on the ground.
Moving out to 50 feet, the same dips and peaks (and drone...) would be heard about 24dB more quietly  ;D.

I was considering the possibility that early reflections could cause a null in the near field, but not a null at 50 feet away.
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Ivan Beaver

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Re: Unused subwoofer shorting
« Reply #21 on: March 12, 2020, 04:04:08 pm »

I was considering the possibility that early reflections could cause a null in the near field, but not a null at 50 feet away.
Outdoors you should not have reflections (if doing it correctly-and I know Art would make sure of that).

And if there were reflections, the freq of the notch would change as you move further away.  It will go lower and lower as the distance between the direct and the reflected sound gets larger and larger
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A complex question is easily answered by a simple-easy to understand WRONG answer!

Ivan Beaver
Danley Sound Labs

PHYSICS- NOT FADS!

Gordon Brinton

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Re: Unused subwoofer shorting
« Reply #22 on: March 12, 2020, 04:12:13 pm »

Outdoors you should not have reflections (if doing it correctly-and I know Art would make sure of that).

And if there were reflections, the freq of the notch would change as you move further away.  It will go lower and lower as the distance between the direct and the reflected sound gets larger and larger
I meant reflections off of the adjacent dead sub. But okay. Never mind.
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Ivan Beaver

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Re: Unused subwoofer shorting
« Reply #23 on: March 12, 2020, 07:07:12 pm »

I meant reflections off of the adjacent dead sub. But okay. Never mind.
I would "assume" that Art put them side by side.

So they would probably be within 1/4 wavelength of each other, so the "reflection" would be a non issue, because the phase difference would be small.
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A complex question is easily answered by a simple-easy to understand WRONG answer!

Ivan Beaver
Danley Sound Labs

PHYSICS- NOT FADS!

Art Welter

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Re: Unused subwoofer shorting
« Reply #24 on: March 12, 2020, 09:10:22 pm »

I would "assume" that Art put them side by side.
Correct, photo descriptor included. I miss being able to test speakers in the road!

Having moved near noisy I-95, the ambient noise could be enough to power LED lighting if we lined the roads with discarded speakers used as generators connected via full wave rectifiers, "Freeway" energy!



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Re: Unused subwoofer shorting
« Reply #24 on: March 12, 2020, 09:10:22 pm »


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