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Planar Speaker Asylum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: RE: What is the purpose of the rear wave in dipole speakers? Can you just put planars in a box? posted by hahax@verizon.net on August 19, 2015 at 21:04:52:
Obviously the rear wave is there to make trouble...
You can seal the back of the planar in a box and some do so. But then you get box colorations you can only get rid of with heroic bracing and damping. Think VMPS RM30 or RM40. They needed restuffing and additional bracing to get the most our of them. The enclosure also forms an air spring so reduces the speed of the diaphragm slightly. On the other hand it adds to dynamics (see Jenzen box electrostatics) and efficiency so you can use a smaller panel to cover a large bandwidth.
The problem is that you trade off the reverberant field the backwave creates once it is delayed sufficiently.It helps define spaces better.
The normal solution to having space constraints is to use extensive diffusion and place the speaker 2-3 feet out. If you need to have them closer up then you need absorption as you suggest. But it needs to be broadband absorption so is likely to be layered. You might like the presentation that way as it retains the inherent speed of the drivers, and it can enhance clarity. But that will be at a loss of the ambient feel and have a dry sound that some can't tolerate - a bit like an anechoic chamber. There is a reason nobody wants to listen in one of those "perfect acoustics".You can overcome this to an extent with a really bad SET constantly driven hard so it produces lots of 2nd order harmonic distortion that can trick the ear into an illusion of a regained reverberation and alleviate the dryness.
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- RE: What is the purpose of the rear wave in dipole speakers? Can you just put planars in a box? - Satie 22:16:49 08/19/15 (0)
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