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RE: That makes sense for a woofer, not a subwoofer

After several bounces around the room, the initial advantage dipoles have in the bass due to their directivity is reduced because all of the modes will eventually be excited. Still I concede that a dipole will generally have smoother in-room bass than a monopole.

One solution is to use multiple monopole bass sources intelligently distributed around the room. According to Geddes, "the spatial variations, and to a certain extent the frequency response variations, will go down (get smoother) as 1/N, where N is the number of independent sources."

That is why, when I designed a subwoofer system specifically to blend well with Maggies and Quads (the original target market for the Swarm), I used four small subs instead of just two... in my experience, it takes four intelligently distributed monopole subs to match the in-room bass smoothness of two dipole main speakers. (In practice, thus far I have found that reversing the polarity of one of the four subs improves the in-room smoothness.)

Because a monopole can pressurize the room below the modal region, whereas a dipole cannot, monopole bass sources can potentially go deeper and deliver more tactile bass.

Duke

Me being a dealer makes you leery?? It gets worse... I'm a manufacturer too.


Edits: 06/02/16 06/02/16 06/02/16
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