-> It's also possible that most of the noise was coming from
-> manufacturers' demo vehicles.  Orion, for example, has a couple vans
-> that they take to the various events to show off their products.
-> Both go to the extreme -- the one I do remember the specs for had a
-> wall built just behind the sliding side door, with eighteen
-> (four-five-five-four across) twelve-inch subwoofers mounted in it.
-> Total power was rated at 4800W (pissant for a concert sound system,
-> but over-the-top for something running on a 12VDC supply).
Of course, they do plug in an extension cord into the back of the van,
and there's a big transformer inside converting 110AC -> 12VDC,
constantly charging the batteries.
-> Interior
-> SPL had been measured (with volume controlled by an EXTERNAL remote,
-> of course) at around 153dB.  With the help of a little specialized
-> processing, a DAT with a recording of the lowest pipe-organ note in
-> existence (around 28Hz as I recall) produced vibrations I could feel
-> in the ground from 200 feet away.
Actually, if I remember right, the lowest pipe organ note is 16hz.
-> The windshield was moving
-> in-and-out almost a full inch in response to this.
I saw Orions' demo van.  I was very, very impressed with it.  It had
some of the best bass I have ever heard.  The mids and highs were not
bad at all either.  A couple of my friends sat in back, right in front
of the subs, popped in a cd, turned the volume up to about 1'oclock, and
when the bass hit they jumped out of the van so fast you'd have thought
someone had a gun to their head.  It was hilarious.  Sitting in back,
the bass hit so hard, your stomach ached.  It was quite an experience.
Later on that day, (after I'd left the sound off), they accidentally
BLEW OUT the front windshield.  Some spectater probably closed the
sliding door on accident, and with all that pressure inside, there goes
the windshield.  I worked out the math awhile ago, and if I did it
correctly I figure they were running about 80+PSI (during peaks) in the
van. That's a hell of a lot of pressure.
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