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<blockquote data-quote="jon_k" data-source="post: 6429065" data-attributes="member: 614503">This is a friend who is just repeating bits and pieces of what he&#039;s heard from other people.Certain frequencies will cancel out, while others will be increased in amplitude. Cancellation happens when two opposing waves hit each other at the same wavelength in the same phase, thus attenuating themselves. The factors include frequency output and distance between the drivers; which effect the exact frequency which will feel the most damage. I assume frequencies around that deadpoint will be attenuated at so many db&#039;s per octave.All this means is you&#039;ll have a dead spot in a certain frequency range with a bell curve in both directions.This is because in a tuning fork, the waves extrude in the same direction at the part where amplitude is generated causing an audio couple, where the waves couple with each other and intensify. Tuning forks emit waves in all directions unilaterally, while a subwoofer emits from only two directions (front and back of driver; but in one direction if the driver is sealed) Since you&#039;d have two subs emitting in opposing fashion from a linear source, the waves would hit and disperse causing attenuation.</blockquote>

[QUOTE="jon_k, post: 6429065, member: 614503"] This is a friend who is just repeating bits and pieces of what he's heard from other people. Certain frequencies will cancel out, while others will be increased in amplitude. Cancellation happens when two opposing waves hit each other at the same wavelength in the same phase, thus attenuating themselves. The factors include frequency output and distance between the drivers; which effect the exact frequency which will feel the most damage. I assume frequencies around that deadpoint will be attenuated at so many db's per octave. All this means is you'll have a dead spot in a certain frequency range with a bell curve in both directions. This is because in a tuning fork, the waves extrude in the same direction at the part where amplitude is generated causing an audio couple, where the waves couple with each other and intensify. Tuning forks emit waves in all directions unilaterally, while a subwoofer emits from only two directions (front and back of driver; but in one direction if the driver is sealed) Since you'd have two subs emitting in opposing fashion from a linear source, the waves would hit and disperse causing attenuation. [/QUOTE]

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