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<blockquote data-quote="Ivan Beaver" data-source="post: 109538" data-attributes="member: 30">Re: Lumbar Array?I have actually done the same thing-but on a smaller scale.&nbsp; My boss referred to it as &quot;BVERB&quot; for Beaver Reverb.I was not trying to fool European acousticians-but rather just some &quot;southern Baptists&quot;.The first time I did it was in the choir room of a 2500 seat Sanctuary.&nbsp; The choir room was laid out exactly like the main room and directly behind it.I used TEF and took polar ETCs of the main room .&nbsp; The polar ETC allows you to see the level-time-freq response-elevation and azmith of each reflection.I then designed a system (speakers/amps etc) to simulate the larger reflections in the room-as heard from the choir risers.I used a Yamaha 01V96 as my main &quot;engine&quot; with some outboard outputs (to give me the extra outs I needed).&nbsp; I think I used 8 mics spaced around the choir (not as typical choir amplification mics) but rather as mics to pickup the sound-and drive them into the &quot;reflection speakers&quot;.I was very pleased with the results.&nbsp; Since I could walk from one room to the other (across a hall) it was real easy to go into the main room and clap/yell/play instruments etc and then walk into the choir room and do the same and see how close it sounded.It turned out better than I had hoped for. I would not compare it to a real enhancement system-but the price tag had at least 1 zero removed from it. <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" /></blockquote>

[QUOTE="Ivan Beaver, post: 109538, member: 30"] Re: Lumbar Array? I have actually done the same thing-but on a smaller scale. My boss referred to it as "BVERB" for Beaver Reverb. I was not trying to fool European acousticians-but rather just some "southern Baptists". The first time I did it was in the choir room of a 2500 seat Sanctuary. The choir room was laid out exactly like the main room and directly behind it. I used TEF and took polar ETCs of the main room . The polar ETC allows you to see the level-time-freq response-elevation and azmith of each reflection. I then designed a system (speakers/amps etc) to simulate the larger reflections in the room-as heard from the choir risers. I used a Yamaha 01V96 as my main "engine" with some outboard outputs (to give me the extra outs I needed). I think I used 8 mics spaced around the choir (not as typical choir amplification mics) but rather as mics to pickup the sound-and drive them into the "reflection speakers". I was very pleased with the results. Since I could walk from one room to the other (across a hall) it was real easy to go into the main room and clap/yell/play instruments etc and then walk into the choir room and do the same and see how close it sounded. It turned out better than I had hoped for. I would not compare it to a real enhancement system-but the price tag had at least 1 zero removed from it. :) [/QUOTE]

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