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<blockquote data-quote="Brent Venter" data-source="post: 9960" data-attributes="member: 499">Hi Guys,So I got to tune an install over the last two days and because I had extra time I played around to get the maximum out of the experience. While aligning the under balcony speakers to the main hang I came across something I hope to get some insight on.In the attached photo&#039;s there are two traces, purple is the under balcony speaker and blue live trace the under balcony summed with the main hang. In the polarity correct measurement you can clearly see the summation around 200Hz-300Hz (under balcony high-passed), however the coherence and HF in the 10kHz-20kHz range is poor. You can see in the Phase trace the correct polarity in this region as well.In the polarity incorrect photo it is very clear the non summation in 200Hz-300Hz, however in the HF region the coherence is much better and summation in this region compared to the polarity correct measurement. Did this summation show up because the coherence improved and was there all along? and why would the coherence improve relevant to the polarity?I know I didn&#039;t show the measurement of the main hang separately, I ran out of trace memories however I did confirm polarity.PS. polarity incorrect means under balcony reversed compared to the main hang and vice versa.Thanks[ATTACH]158857[/ATTACH][ATTACH]158858[/ATTACH]</blockquote>

[QUOTE="Brent Venter, post: 9960, member: 499"] Hi Guys, So I got to tune an install over the last two days and because I had extra time I played around to get the maximum out of the experience. While aligning the under balcony speakers to the main hang I came across something I hope to get some insight on. In the attached photo's there are two traces, purple is the under balcony speaker and blue live trace the under balcony summed with the main hang. In the polarity correct measurement you can clearly see the summation around 200Hz-300Hz (under balcony high-passed), however the coherence and HF in the 10kHz-20kHz range is poor. You can see in the Phase trace the correct polarity in this region as well. In the polarity incorrect photo it is very clear the non summation in 200Hz-300Hz, however in the HF region the coherence is much better and summation in this region compared to the polarity correct measurement. Did this summation show up because the coherence improved and was there all along? and why would the coherence improve relevant to the polarity? I know I didn't show the measurement of the main hang separately, I ran out of trace memories however I did confirm polarity. PS. polarity incorrect means under balcony reversed compared to the main hang and vice versa. Thanks [ATTACH=CONFIG]158857.vB5-legacyid=9594[/ATTACH][ATTACH=CONFIG]158858.vB5-legacyid=9595[/ATTACH] [/QUOTE]

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