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<blockquote data-quote="John Roberts" data-source="post: 141733" data-attributes="member: 126">Re: Infocomm???I don&#039;t see the pictures so I will try again.Fist pix is of the speaker. From the article they state SPL of 131 db (article used little b but Bell hadn&#039;t been dead that long at the time) on axis 30 feet from the speaker with the energy radiated over a 40&#039; cone.second pix is of the amps 4x500W amps (driving 4 segments of speakers) from a wire recorder. Expected usable speech intelligibility at 10,000 feet so they can fly higher than machine gun fire. Two miles is decent throw, but keep in mind just for speech frequencies so not a real threat for Ivan&#039;s &quot;Longest speaker throw&quot; competition. <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=":-)" /> JR</blockquote>

[QUOTE="John Roberts, post: 141733, member: 126"] Re: Infocomm??? I don't see the pictures so I will try again. Fist pix is of the speaker. From the article they state SPL of 131 db (article used little b but Bell hadn't been dead that long at the time) on axis 30 feet from the speaker with the energy radiated over a 40' cone. second pix is of the amps 4x500W amps (driving 4 segments of speakers) from a wire recorder. Expected usable speech intelligibility at 10,000 feet so they can fly higher than machine gun fire. Two miles is decent throw, but keep in mind just for speech frequencies so not a real threat for Ivan's "Longest speaker throw" competition. :-) JR [/QUOTE]

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