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Message: <blockquote data-quote="CBFryman2" data-source="post: 2430994" data-attributes="member: 565445"><p>Any bass frequincy is going to sustain pressure changes long enough to cause internal damage when you are talking about a good portion of the ambient pressure being sucked down and then pushed up.</p><p></p><p>Even with a 2PSI pressure sweep  that is like a 200lb man belly floping up and down on your stomach 20-80 times persecond...</p></blockquote><p></p>

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