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[Mike {AB} Butler]

Thanks, Mark for clarifying what you meant. I guess I missed that part..   Good points on the rest of your post.
However, it's clear that this guy is going to keep on trying to post in something other than scientific terms.  
Regards,

[Mark "Bass Pig" Weiss]

Mark Sadhra wrote on Wed, 31 January 2007 05:37

Why does it require massive output at 10hz? most SPL systems are tuned around 50hz.Spl systems don't use small sealed boxes they use very large ported boxes tuned high. Take a look at the link below. Thats a install log of a system similar to the one in the viseo. Same subs 4000 watts more power. http://fresnoracing.ipbhost.com/index.php?showtopic=30159

Mark,
Because sound at 50Hz doesn't cause a slow movement of objects like we see in the video. That glass was moving at resonance, which is more like 2-3 Hz. 50hz output won't excite an object that's resonant at 2Hz. The initial wavefront would have to be of infrasonic range, with a very large change in barometric pressure.

I think that Steve Meade Designs is using the video as a marketing stunt, with a large helping of deception thrown in.

Thanks for pointing out the construction link. The photos were enjoyable to view. Nice construction technique with the threaded steel rods. Although 34.5Hz is not a very low tuning frequency. I tend to consider 30Hz to be more in the midbass range, than deep bass. (After listening to 10Hz test signals all afternoon, even 20Hz seems almost like treble to my ears.)

[steve meade]

Mark "Bass Pig" Weiss wrote on Mon, 29 January 2007 21:50

There's a video reposted on YouTube, from Realm of Excursion, claiming to be shaking the windows on some storefront. Here's the video link: http://www.youtube.com/watch?v=9wAxPwh5bF0 However, it looks suspicious for the following reasons: Look at the guy leaving the store. Now most of us have seen windows shake like that when the door slams. The timing of the window shake, just a couple seconds before the guy passes by is awfully suspect. If it were really that possible to produce enough infrasound to shake the windows from 20' away like that, then the guy would be doubling over and vomiting on himself, or perhaps would avoid walking in that direction altogether. At the very least, he'd be putting his hands over his ears in a hurry as that soundblast occurs. He didn't react at all, which is suspicious. I think the audio was dubbed in later, or the whole video was shot at a time when they KNEW a customer would be leaving the store. OTOH, if 4 RE 18" drivers COULD do that, then i reckon 4 Bassmaxx ZR18s would have broken all the store windows.

i love it when someone who APPEARS to be much smarter then me, and probably is, makes a STUPID comment like this.  No it wasnt staged, it was real.  Every video ive ever done is real.  You can examine it all you want but those windows are not shaking because someone opened up a door LOL.  My system is 100% without a doubt flexing those windows.  Dont let the distortion (due to the digital cam not being able to take the bass) fool you.....ive spent as much if not MORE time on my RTA as i have on my SPL sensor. It actually sounds pretty good for being capable of that kind of sound pressure.

Please, do me a favor, go to my site and look at my other videos.  Do some research on just what i have in my Tahoe before you make comments that make you look "not so smart".

OTOH, if 4 RE 18" drivers COULD do that, then i reckon 4 Bassmaxx ZR18s would have broken all the store windows.

Nice comment....i "reckon" that your wrong.  Those ZRS look ok for what you guys are doing but for what I AM DOING, those things dont want ANY of my old RE MT's NOR my Current Fi BTL subs.  

Also, about this being a "marketing stunt"......what am i marketing?  My site is just for fun and basicly a journal of everything about me and the things i do.....i dont really sell anything.  I work for a commercial roofing company im not even "technically" in the industry.  Im in it just for fun and i dont profit off of anything unless you count my sponsorships.  Free gear i guess is profit but no hand-over-fist cash making here. Just fun.

Thanks for over examining my stuff though.  Might want to re-evaluate.
Regards,
Steve Meade.
www.stevemeadedesigns.com

[steve meade]

BTW: nice video with the carpet floating, must have had some strings and some good camera work.....

just playin...anyway i wouldnt mind coming around here and learning some home audio expertise from you guys since im interested in that field.  I gotta say though when it comes to the car enviroment some of you guys should be taking notes and not coming to conclusions without having the facts.....the same way I SHOULD before popping off at the jaws about what YOU guys are doing.

[Andy Peters]

steve meade wrote on Thu, 01 March 2007 13:06

just playin...anyway i wouldnt mind coming around here and learning some home audio expertise from you guys since im interested in that field.

This is not the Home Audio Board.  While most of us here have decent enough home stereo systems (and hopefully, large record collections to go with that system), we don't discuss home stereo stuff here.  There are plenty of other forums where one can discuss the finer points of home theatre set-ups.

Quote:

I gotta say though when it comes to the car enviroment some of you guys should be taking notes and not coming to conclusions without having the facts.....the same way I SHOULD before popping off at the jaws about what YOU guys are doing.

Here's a conclusion: systems designed to simulate a nuclear explosion in the back of a Scion xB are not audio systems.  It may be interesting, in a very weird and ickily-masturbatory way, to generate a 190 dB SPL tone burst for a hundred milliseconds, but that skill (and the techniques and equipment used to do it) isn't useful when the task is to present high-quality music program material to a large audience.

-a

[steve meade]

i drive a Tahoe not a Scion thanks  

[Andy Peters]

steve meade wrote on Thu, 01 March 2007 20:54

i drive a Tahoe not a Scion thanks

... so otherwise, my observation is true?

-a

[Mike {AB} Butler]

.. all that had what to do with Andy's comments? Andy was simply talking about the fact that it's a lot harder to do music at higher SPL's for an audience.. than it is inside an automobile. Since this board is about LIVE sound reproduction, not about automotive sound reproduction, it would be better to keep to the subject at hand.
Regards,

[Mac Kerr]

Antone Atmarama Bajor wrote on Fri, 01 December 2006 20:07

Just wondering what happened to the car subwoofer thread??? I know its not PA (Public Adress/Pro Audio)  But it did involve using "PA" Drivers. Antone-

That topic got axed because this is not a car audio forum. This one got locked because it ultimately followed the same path,

Mac
moderator

[Mac Kerr]

jon, please go to your profile and change your alias to your real full name as required by the posting rules clearly displayed at the top of the page.

Mac
moderator