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Junior Varsity
Line array calculators indoors - some observations and questions
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<blockquote data-quote="Phil Graham" data-source="post: 125337" data-attributes="member: 430"><p>Re: Line array calculators indoors - some observations and questions</p><p></p><p></p><p></p><p>You've got plenty of HF at the front because the array is aimed too low, coupled the inverse square law consequences of your low trim height/short array pairing.</p><p></p><p></p><p></p><p>Roger. The audience plane marker targeted frequency response in the bottom right look suspiciously smooth, and therefore probably not trustworthy, even though the principle you are aiming for is correct. Also, the low and mid frequency behavior of the room, as the array's power response opens up, is probably not accounted for in those graphs, and is having influence in the space. At high frequencies the direct field response of the array is what the audience experiences, but at low and mid frequencies it is the collective array + room power response that sets the tonality.</p><p></p><p>I suggest looking instead at the predicted directivity balloons at a number of frequencies, and ignore the pretty broadband predicted curves from LAC that clearly didn't correlate to the room behavior.</p><p></p><p></p><p></p><p>What I mean is that all of the "line arrays are perfect, don't process any part of the array differently," is complete BS. Intra and/or inter box processing changes for a line array are often complex and unintuitive, but it doesn't mean that you shouldn't seek to achieve the desired array behavior through processing. Further, it doesn't matter how crazy LAC's polar balloons look in mid air above the audience, all that matters is consistency at the plane of the audience's ears.</p></blockquote><p></p>
[QUOTE="Phil Graham, post: 125337, member: 430"] Re: Line array calculators indoors - some observations and questions You've got plenty of HF at the front because the array is aimed too low, coupled the inverse square law consequences of your low trim height/short array pairing. Roger. The audience plane marker targeted frequency response in the bottom right look suspiciously smooth, and therefore probably not trustworthy, even though the principle you are aiming for is correct. Also, the low and mid frequency behavior of the room, as the array's power response opens up, is probably not accounted for in those graphs, and is having influence in the space. At high frequencies the direct field response of the array is what the audience experiences, but at low and mid frequencies it is the collective array + room power response that sets the tonality. I suggest looking instead at the predicted directivity balloons at a number of frequencies, and ignore the pretty broadband predicted curves from LAC that clearly didn't correlate to the room behavior. What I mean is that all of the "line arrays are perfect, don't process any part of the array differently," is complete BS. Intra and/or inter box processing changes for a line array are often complex and unintuitive, but it doesn't mean that you shouldn't seek to achieve the desired array behavior through processing. Further, it doesn't matter how crazy LAC's polar balloons look in mid air above the audience, all that matters is consistency at the plane of the audience's ears. [/QUOTE]
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Line array calculators indoors - some observations and questions
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