A speaker with drivers on opposite sides is likely not dipolar, but rather bipolar. Examples include Mirage.
Nor is a speaker with drivers on 45 degree angled baffles, in my opinion. Dweller's explanation is pretty good.
Examples of speakers with dipole radiation characteristics include moving coil speakers such as Audio Artistry and Gradient and many planar/ribbon/electrostatic speakers such as Magnepan and Sound Lab. While cancellation occurs especially in the bass, the recreation of the reverberant sound field by a dipole can add significant realism to the sound and listening enjoyment.
Brian
Nor is a speaker with drivers on 45 degree angled baffles, in my opinion. Dweller's explanation is pretty good.
Examples of speakers with dipole radiation characteristics include moving coil speakers such as Audio Artistry and Gradient and many planar/ribbon/electrostatic speakers such as Magnepan and Sound Lab. While cancellation occurs especially in the bass, the recreation of the reverberant sound field by a dipole can add significant realism to the sound and listening enjoyment.
Brian