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Audio and Video Talk
General Discussion
If you've ever wondered what's inside a Vivid...Ouch!!
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<blockquote data-quote="Timber_MG" data-source="post: 925563" data-attributes="member: 18"><p>I won't call a 802D3 a bad speaker by any stretch just that it is not what it could have been.</p><p></p><p>A +10dB resonance is not called for in this day and age, especially not if you make a lot of use of FEM/BEM modeling tools everywhere else in the cab. A 250Hz mode with a 1/2 wavelength of 70cm will propagare just fine out the bottom port even if it were to the rear. With transmission line models like in the Giya the art is to not set up resonances geometrically such that they propagate out the port. It is impossible to avoid them and they do show up as a harmonic series in the impedance plot, the art is to not have them radiate out the port/driver to any significant extent. They are oddly wide bandwidth ports BTW.</p></blockquote><p></p>
[QUOTE="Timber_MG, post: 925563, member: 18"] I won't call a 802D3 a bad speaker by any stretch just that it is not what it could have been. A +10dB resonance is not called for in this day and age, especially not if you make a lot of use of FEM/BEM modeling tools everywhere else in the cab. A 250Hz mode with a 1/2 wavelength of 70cm will propagare just fine out the bottom port even if it were to the rear. With transmission line models like in the Giya the art is to not set up resonances geometrically such that they propagate out the port. It is impossible to avoid them and they do show up as a harmonic series in the impedance plot, the art is to not have them radiate out the port/driver to any significant extent. They are oddly wide bandwidth ports BTW. [/QUOTE]
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Audio and Video Talk
General Discussion
If you've ever wondered what's inside a Vivid...Ouch!!
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