Car subwoofer for outdoor PA use - Page 3 - diyAudio
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Old 24th August 2013, 08:53 PM   #21
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Quote:
Originally Posted by Michael Bean View Post
The problem is that the "cabin gain", or room gain only applies to the INSIDE of the room, not outside.

Mike
If so ,then why can you hear a car sub from a block or two away?
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Old 24th August 2013, 08:57 PM   #22
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Originally Posted by Jsixis View Post
and 2 cabs at 90lbs is a lot lighter then 1 car
But I wouldn't have to lift the car.
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Old 24th August 2013, 10:45 PM   #23
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a big and moving sub equals a car equtation is not bad as it is.
but rahter, since you would use the whole car, you got space to use efficient PA drivers.
a tipical car sub does not need to go below 60~ hz at -3dBL to sound verry deep. as cabin gain helps it out. a PA speaker ina box that is allso designed to go down to only 60~ ish hz will be a lot louder, will require less amplifier power, and surely will at least sound musical, instead of the tipical "thump-thump".

If one wants the comparism done, btw, just listen to a car sub at outdoors. it will sound like a dogfart. this is why i would rather advise for this experiment PA drivers.
a problem i can allready see is the car it self.
the thing is not stiff enough to reach those realy high SPL figures.
so in the end it is more practical to use a van, and build a box that just fits into the van.
one can more or less do it in a fashion where is the cab of the van would be the ported chamber of a bandpass box. but, the windows might not yield a suitable vent.
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Old 24th August 2013, 11:23 PM   #24
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Quote:
Originally Posted by Don Bunce View Post
If so ,then why can you hear a car sub from a block or two away?
Mostly because they mess with the tuning and end up with loud one note bass.

"thump a thump a thump"
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Old 26th August 2013, 08:26 PM   #25
wg_ski is offline wg_ski  United States
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Quote:
Originally Posted by Don Bunce View Post
If so ,then why can you hear a car sub from a block or two away?
Hearing it a block away and it doesn't have to be all THAT loud. 70dB of that garbage is pretty annoying. For a good kick in the chest it's got to be 100dB+.
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Old 26th August 2013, 08:40 PM   #26
tinitus is offline tinitus  Europe
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that sure sounds like fun (and I'm laughing)

hey, don't forget the Danley truck subwoofer

I guess you could build a smaller 'VAN version', and still have bass
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Old 27th August 2013, 07:38 AM   #27
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Quote:
Originally Posted by Don Bunce View Post
If so ,then why can you hear a car sub from a block or two away?
Generally, a lot more power is being used and lower frequencies are being played than PA setups.

I don't think a car would be a good idea because a lot of rattle and other noises will be introduced.
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Old 27th August 2013, 08:14 AM   #28
tinitus is offline tinitus  Europe
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Danley Matterhorn subwoofer ... once saw nice photos, but seem to have vanished
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Old 27th August 2013, 10:19 AM   #29
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A "Mini-Matterhorn" would be cool... The Making of the Matterhorn - YouTube
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Old 27th August 2013, 03:35 PM   #30
tinitus is offline tinitus  Europe
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that's the video I couldn't find
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