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post #31 of 34 Old 02-27-2013, 10:21 AM
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Originally Posted by KidHorn View Post

I don't think anyone is suggesting it's a good idea to match two subs with vastly different capabilities.



THX reference levels are not a consideration as the wife can only handle -20 to -15 on the MVC so there's no point in pushing THX reference listening levels.


A big thumbs up to your above. Too many hard rules makes for a very inflexible environment as it's about the end, not the means.



Wasn't it two weeks ago that you EQ'd your setup so that you only needed to listen to -60 mv? You argued with us that our hearing was faulty or your hearing was exceptional. rolleyes.gif
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post #32 of 34 Old 02-27-2013, 11:15 AM
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Originally Posted by KidHorn View Post

I'm not sure what you mean by center, but both the driver and ports are pushing and pulling air. In opposite directions with a slight delay.

If you're asking where the driver would be placed with a same sized sealed sub to give the same sound, I would guess a little closer to the ports, but not much. And it would vary with frequency since the tubes have a resonant frequency where they omit a disproportionate amount of sound..
So part of the answer is the effective center depends on the frequency.

Again I realize this is theoretical, but if one wanted to place a sub based on room dimensions (which is what the article is about) for the sub in picture above the 'guesstimate' is that the center of sound origination would be about the same place as the physical center of the box footprint.
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post #33 of 34 Old 02-27-2013, 12:34 PM
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Originally Posted by noisebeam View Post

So part of the answer is the effective center depends on the frequency.

Again I realize this is theoretical, but if one wanted to place a sub based on room dimensions (which is what the article is about) for the sub in picture above the 'guesstimate' is that the center of sound origination would be about the same place as the physical center of the box footprint.

Close enough for a down firing sub. A front firing would be at the front of the sub. Either way, you're talking about a foot or so. Probably doesn't matter much.
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post #34 of 34 Old 02-27-2013, 01:41 PM
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So part of the answer is the effective center depends on the frequency.
The center of the radiation pattern is the center of the baffle, at any frequency, as the wavelengths from a sub are far too long for driver or port offset to be worth considering.

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