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<blockquote data-quote="Bennett Prescott" data-source="post: 57040" data-attributes="member: 4">Re: High Frequency Compression Driver EvaluationI asked about this and I got this response from Roberto Magalotti, who is our head of driver research &amp; development:&quot;To answer the poster&#039;s question, yes, at the driver throat the wavefront is well approximated by a spherical cap with an angle determined by the exit duct geometry, at least if the driver is well designed. Clearly, having a nice wavefront at the driver exit does not guarantee having a nice wavefront at the horn mouth, and here is where some knowledge of Acoustics and a fair amount of simulations come in handy.&quot;Hopefully that clears up the issue. Certainly we do not design to have a flat wavefront at the driver throat, at any frequency. If you need a different wavefront shape it is best to do that with a horn, of which we offer several models. Getting this right with as little smearing as possible in the phase plug across several octaves is part of why we invest so much in R&amp;D, and the driving force behind our latest series of drivers (e.g. DE980, DE1080, DE120) and dome technologies.</blockquote>

[QUOTE="Bennett Prescott, post: 57040, member: 4"] Re: High Frequency Compression Driver Evaluation I asked about this and I got this response from Roberto Magalotti, who is our head of driver research & development: "[I]To answer the poster's question, yes, at the driver throat the wavefront is well approximated by a spherical cap with an angle determined by the exit duct geometry, at least if the driver is well designed. Clearly, having a nice wavefront at the driver exit does not guarantee having a nice wavefront at the horn mouth, and here is where some knowledge of Acoustics and a fair amount of simulations come in handy.[/I]" Hopefully that clears up the issue. Certainly we do not design to have a flat wavefront at the driver throat, at any frequency. If you need a different wavefront shape it is best to do that with a horn, of which we offer several models. Getting this right with as little smearing as possible in the phase plug across several octaves is part of why we invest so much in R&D, and the driving force behind our latest series of drivers (e.g. DE980, DE1080, DE120) and dome technologies. [/QUOTE]

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