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Open request for photos of your subwoofer configurations
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<blockquote data-quote="Ivan Beaver" data-source="post: 89000" data-attributes="member: 30"><p>Re: Open request for photos of your subwoofer configurations</p><p></p><p></p><p>The front subs are placed 1/4 WL (wavelength) in front of the rear subs and delayed 1/4 WL. So from the front-the signals from both arrive at the same time.</p><p></p><p>From the rear perspective the sound behind the subs makes the sound behind the cluster to have 2 arrivals-one from the rear sub and another from the front sub-so 1/4 +1/4=1/2WL. So the signals will be out of polarity and will cancel-at least a good bit. Hence the null.</p><p></p><p>Of course this only works over a limited freq range. Outside of that range-the effects (both in front and rear) are not as good.</p><p></p><p>As you can see from the attached model-(with a mic in front and behind the cluster</p></blockquote><p></p>
[QUOTE="Ivan Beaver, post: 89000, member: 30"] Re: Open request for photos of your subwoofer configurations The front subs are placed 1/4 WL (wavelength) in front of the rear subs and delayed 1/4 WL. So from the front-the signals from both arrive at the same time. From the rear perspective the sound behind the subs makes the sound behind the cluster to have 2 arrivals-one from the rear sub and another from the front sub-so 1/4 +1/4=1/2WL. So the signals will be out of polarity and will cancel-at least a good bit. Hence the null. Of course this only works over a limited freq range. Outside of that range-the effects (both in front and rear) are not as good. As you can see from the attached model-(with a mic in front and behind the cluster [/QUOTE]
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Open request for photos of your subwoofer configurations
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