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In Part 2 of this series of articles, we discuss the trade-off for trying to achieve maximum coupling in front of a ground-stacked cardioid setup by reversing the bottom subwoofer.
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Which subwoofer to reverse in a vertical ground-stacked (half space) cardioid setup remains eluding. We all know that the physical displacement of the speakers with respect to the floor determines whether we remain coupled and therefore efficient.
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figure 1One of the more prevailing questions after "Where to time align the subs?" is typically "Where to time align a center sub?".
When we introduce physical displacement between loudspeakers in multiple dimensions, we end up creating triangular pyramids with sides of different lengths between the loudspeakers and listeners.
These path differences create additional time offsets which make it even more challenging to remain time aligned for as many spectators as possible.
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by Nathan Lively of Sound Design Live
In this episode of the Sound Design Live podcast I talk to Bob McCarthy, Mauricio Ramírez, Merlijn Van Veen and Daniel Lundberg about the best audio calculators for sound system design and optimization in the categories of desert island, design work, field work, and education.
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"When a loudspeaker is reproducing sound with a wavelength considerably larger than the size of its enclosure, we all know that it should be essentially omnidirectional and send out sound waves spherically."
John Vanderkooy
(BEng, PhD – Distinguished Professor Emeritus)
And yet, when we walk around a subwoofer we can clearly hear that it's directional. So what's going on? The devil is in the details.