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<blockquote data-quote="Phil Graham" data-source="post: 125334" data-attributes="member: 430">Re: Line array calculators indoors - some observations and questionsTJ,I might describe it in different terms, but Evan is on the correct track here. You&#039;re going to need wider splay to get HF down to the front seats, and you need the array&#039;s overall HF coverage lobe and low mid coverage lobe to have more similar power responses.Some thoughts:<ol>
<li data-xf-list-type="ol">Why the heck are you looking at LAC at 1kHz? This has no bearing on balancing the arrays coverage in the room, and is indeed in the octave where most line arrays have the strongest undesirable grazing side lobes to muddy the waters. Try using 250, 500, 4k, and 8k as your frequencies to balance and compare coverage.</li>
<li data-xf-list-type="ol">Give up on trying to make the coverage even from front to back, but instead aim for consistent tonal balance in each section of the room. You don&#039;t have enough array, nor is it high enough, to get the thing even from front to back.</li>
<li data-xf-list-type="ol">The array is aimed too low. The primary lobe finger at 8kHz should be above standing ear level at the back of the room.</li>
<li data-xf-list-type="ol">You can use staggered high passes and/or delay on the low frequency bandpass of the top box in the hang to raise the primary axis of the low mid lobe</li>
<li data-xf-list-type="ol">There&#039;s nothing wrong with attenuating and/or shelving the high end of the bottom most box to balance the HF behavior. Splay the boxes to get the audience in the coverage pattern, and deal with the VHF magnitude with processing.</li>
<li data-xf-list-type="ol">Don&#039;t fret to process boxes and/or bandpasses separately, and remember that the lobing behavior adjacent to the array doesn&#039;t matter. All that matters is the result at the audience plane. The &quot;special snowflake&quot; processing approach to line arrays is something I strongly advise against.</li>
</ol>Ping me offline, and I&#039;ll see if I can&#039;t get your LAC file cleaned up to behave more like you want.</blockquote>

[QUOTE="Phil Graham, post: 125334, member: 430"] Re: Line array calculators indoors - some observations and questions TJ, I might describe it in different terms, but Evan is on the correct track here. You're going to need wider splay to get HF down to the front seats, and you need the array's overall HF coverage lobe and low mid coverage lobe to have more similar power responses. [B]Some thoughts:[/B] [LIST=1] [*]Why the heck are you looking at LAC at 1kHz? This has no bearing on balancing the arrays coverage in the room, and is indeed in the octave where most line arrays have the strongest undesirable grazing side lobes to muddy the waters. Try using 250, 500, 4k, and 8k as your frequencies to balance and compare coverage. [*]Give up on trying to make the coverage even from front to back, but instead aim for consistent tonal balance in each section of the room. You don't have enough array, nor is it high enough, to get the thing even from front to back. [*]The array is aimed too low. The primary lobe finger at 8kHz should be above standing ear level at the back of the room. [*]You can use staggered high passes and/or delay on the low frequency bandpass of the top box in the hang to raise the primary axis of the low mid lobe [*]There's nothing wrong with attenuating and/or shelving the high end of the bottom most box to balance the HF behavior. Splay the boxes to get the audience in the coverage pattern, and deal with the VHF magnitude with processing. [*]Don't fret to process boxes and/or bandpasses separately, and remember that the lobing behavior adjacent to the array doesn't matter. All that matters is the result at the audience plane. The "special snowflake" processing approach to line arrays is something I strongly advise against. [/LIST] Ping me offline, and I'll see if I can't get your LAC file cleaned up to behave more like you want. [/QUOTE]

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