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<blockquote data-quote="JohnEJanowitz" data-source="post: 4528091" data-attributes="member: 584636">subsonic technically means slower than the speed of sound.&nbsp; Infrasonic is technically the word you&#039;re looking for.&nbsp;&nbsp; We have lots of people doing some serious SPL&#039;s down to 10Hz in home theaters with IB subwoofers.&nbsp; <a href="http://www.aespeakers.com/phpbb2/viewtopic.php?f=14&amp;amp;t=1624" target="_blank">http://www.aespeakers.com/phpbb2/viewtopic.php?f=14&amp;amp;t=1624</a>&nbsp; Look around on the forum for a few others also, but his has measurments.In a vehicle it is much easier.&nbsp; You have a lot of extra cabin gain to work with meaning you need a lot less power and displacement.&nbsp; This Escort for example has around 35dB of cabin gain at 10Hz with all windows up:<img src="http://www.aespeakers.com/basszone/deonspace/pics/escort_tf.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" />It doesn&#039;t take a lot to hit some high levels at 10Hz with that kind of gain.John</blockquote>

[QUOTE="JohnEJanowitz, post: 4528091, member: 584636"] subsonic technically means slower than the speed of sound. Infrasonic is technically the word you're looking for. We have lots of people doing some serious SPL's down to 10Hz in home theaters with IB subwoofers. [URL="http://www.aespeakers.com/phpbb2/viewtopic.php?f=14&t=1624"]http://www.aespeakers.com/phpbb2/viewtopic.php?f=14&t=1624[/URL] Look around on the forum for a few others also, but his has measurments. In a vehicle it is much easier. You have a lot of extra cabin gain to work with meaning you need a lot less power and displacement. This Escort for example has around 35dB of cabin gain at 10Hz with all windows up: [IMG]http://www.aespeakers.com/basszone/deonspace/pics/escort_tf.gif[/IMG] It doesn't take a lot to hit some high levels at 10Hz with that kind of gain. John [/QUOTE]

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