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scattered multiple subwoofer system

The proof of superior bass response is in the measurements and in the seamless integration with two main speakers. Scattered multiple subwoofers, other than their obvious disadvantages of extra cost and extra space required, tend to have less seamless intergration with the two main speakers compared with the very common left subwoofer - right subwoofer set-up. This is obviously much less of an issue with surround sound.

1/4 wavelength cancelations are not important concerns in the lower bass (20 to 80 Hz.) because almost all of the significant bass frequency response deviations are related to standing waves between opposing room surfaces.

From 80 to 200Hz. the 1/4 wavelength cancellations can become very important as they can make a bass note fundamental frequency completely inaudible if the cancellation is at just the right frequency. That's really changing the bassline.

There are very few directional woofers and omnidirectional tweeters.
The most directional (somewhat directional) woofers are dipole configurations. Tweeters are not omidirectional -- and having a second tweeter on the back of a speaker enclosure doesn't count.
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Richard BassNut Greene
Subjective Audiophile 2007

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