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DIY For Audio
It’s bliss to know nutting, you start impossible things….
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<blockquote data-quote="Ingvar Ahlberg" data-source="post: 1107339" data-attributes="member: 15447"><p>Sorry byt that is not correct, almost all types of planar speakers, from the realy lousy NXT versions from the late 60:s to and including all good electrostatics and magnetostatics they all radiate both forward and backwards but out of phase, as far as I know the only speaker driver type that radiates both ways but in phase is air motion transformers and ESS/Heil laboratories actually made an attempt to a "full range" version in the 70:s, it was said to work but at 800 kg each it didn´t make it to any exhibitons, as far as I know.</p><p></p><p>A plane wave speaker is only about frontal radiating size, nothing else, it´s simple to build a plane wave source out of normal dynamic drivers, just use as many as You need in a panel large enough, in a "normal" listening room in domestic circumstances the Audio Tronic Megatrend speakers worked as a plane wave source at least up to 10 meter listening distance, modern high quality cinema installations (not talking about HT) do this in the entire auditorium, using only dynamic speaker drivers.</p><p></p><p>Ingvar</p></blockquote><p></p>
[QUOTE="Ingvar Ahlberg, post: 1107339, member: 15447"] Sorry byt that is not correct, almost all types of planar speakers, from the realy lousy NXT versions from the late 60:s to and including all good electrostatics and magnetostatics they all radiate both forward and backwards but out of phase, as far as I know the only speaker driver type that radiates both ways but in phase is air motion transformers and ESS/Heil laboratories actually made an attempt to a "full range" version in the 70:s, it was said to work but at 800 kg each it didn´t make it to any exhibitons, as far as I know. A plane wave speaker is only about frontal radiating size, nothing else, it´s simple to build a plane wave source out of normal dynamic drivers, just use as many as You need in a panel large enough, in a "normal" listening room in domestic circumstances the Audio Tronic Megatrend speakers worked as a plane wave source at least up to 10 meter listening distance, modern high quality cinema installations (not talking about HT) do this in the entire auditorium, using only dynamic speaker drivers. Ingvar [/QUOTE]
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DIY & Tutorials
DIY For Audio
It’s bliss to know nutting, you start impossible things….
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