Dipole, bipole and omnidirectional speakers

Most speakers radiate sound from the front. Apparently that seems to work the best. Or does it. Then why are there also speakers that radiate from the front and the back and even speakers that radiate in all directions equally?

Loudspeaker placement: 001 Loudspeaker placement (long version)
What DAC is the best? : What DAC is the best?
How to listen part 1: How to listen part 1

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• #science_technology
• #bipolar
• #dipolar
• #omnidirectional
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