AVS Addicted Member
Join Date: Oct 2001
Location: Monterey Park, CA
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Multipole speakers were helpful when trying to create envelopment using only 2 surround speakers, because they sprayed sound in different directions.
Another way to get that envelopment, without resorting to speakers that are diffuse themselves, is to use additional speakers. In the case of Atmos or Auro, that can mean up to 4 surrounds and 4-6 heights.
Once you have that wrap-around envelopment via additional speakers, it is much easier to hear directionality with monopole speakers than diffuse dipole/bipole speakers.