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<blockquote data-quote="John Roberts" data-source="post: 66497" data-attributes="member: 126">Re: How NOT to hold a large number of open microphones backstageYup as the song goes, &quot;I know a little &#039;bout it&quot;... (one patent and Peavey&#039;s first commercial AM design 15 years ago or so). In classic web forum style, we are not really addressing the OP&#039;s comment, just spewing stuff we know. <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=":-)" />Namely holding a bunch of open mics back stage. In that case, flipping the polarity of every other mic, will create a first order cancellation of sufficiently distant/long audio wavelengths. HF room sound will not cancel as neatly but should be attenuated back stage.JR</blockquote>

[QUOTE="John Roberts, post: 66497, member: 126"] Re: How NOT to hold a large number of open microphones backstage Yup as the song goes, "I know a little 'bout it"... (one patent and Peavey's first commercial AM design 15 years ago or so). In classic web forum style, we are not really addressing the OP's comment, just spewing stuff we know. :-) Namely holding a bunch of open mics back stage. In that case, flipping the polarity of every other mic, will create a first order cancellation of sufficiently distant/long audio wavelengths. HF room sound will not cancel as neatly but should be attenuated back stage. JR [/QUOTE]

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