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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: Two kinds: posted by pictureguy on September 8, 2016 at 16:58:26:
more attenuation occurs with w QRD panel because of phase cancellation. one portion of the reflected wave becomes 90 or 180 degrees out of phase with reflecttion from other portions of a signal.
The Drawback of one of these "stepped" QRD like panels when used directly behind a planar dipole that is parallel to the diffuser is that specific integer frequencies get attenuated or theoretically reinforced while other frequencies do not.
In most installations the diffuser is not going to be back wave.
The cheapest way to make non QRD style geometric reflective diffusers to make are plywood or particle board boxes. Vinyl lovers use the crates or boxes behind the speaker or angled against the wall and stacked on each other to the desired height. You can also build some of the cubes as a boxes with a damped tuned port to be a home made "tube Trap" helmholz attenuator.
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Follow Ups
- RE: Two kinds: - BigguyinATL 10:44:49 09/09/16 (1)
- RE: Two kinds: - pictureguy 11:37:48 09/09/16 (0)
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