I have a three way loudspeaker with a dipole midrange. Is the sound emanating from the rear side of the midrange supposed to be reflected back to the listener or is it ideally supposed to disappear and never be heard by the listener? I asked as my loudspeaker position is not ideal as the left speaker is located where the rear of the speaker opens up to another room, while the right speaker is 2 feet away from the corner. No other positions is available at the moment.
Definitely not reflected back to the listener.
Dispersed in the back, yes. Eventually some portion will make it to the listener, but significantly diffused and delayed. Giving only spaciousness to the sound.
Put some absorbing material in the corner. Should be fine.
Dispersed in the back, yes. Eventually some portion will make it to the listener, but significantly diffused and delayed. Giving only spaciousness to the sound.
Put some absorbing material in the corner. Should be fine.
I reply: make a cage with felt in the behind. What do I mean with cage? Take some strips of felt, say 0.5 x 1 x 4 ", and make a fence around. Then repeat to cover the empty lines. The sound coming from the back is now shielded at the surround and conveyed to the back, the magnet could be covered too, then the back can be covered. But it might be not needed.
Dipoles should never be placed in or even near a corner! Damping the rear wavefront will not help, just changes tonality out of intended... And your setup is way too asymmetric, sorry but there is not a really good cure for that (but changing positioning)
Ideal placement of dipoles is along the long wall of the room, pointed towards the listener and at least 2 feet from the wall.
Ideal placement of dipoles is along the long wall of the room, pointed towards the listener and at least 2 feet from the wall.
A dipole is a natural phenomenon while a room is a construct. There is not really a 'supposed to'.
...Assuming dipole midrange only. Dipole bass needs to be able to "see" at least half a wavelength's-worth of space along its axis.
This interference happens with every reflection actually, but in case of dipole sources just summation/nulling frequency is different. Same with omni which every monopole woofer is below 200Hz... with dipoles, angulation helps a little.
Wavelength calculator https://www.omnicalculator.com/physics/sound-wavelength
Kreskowsky tells more about this http://musicanddesign.speakerdesign.net/Boundary_reflections.html