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In Reply to: RE: which movie have the most violent deep bass sub signal ? posted by Ole Lund Christensen on October 05, 2007 at 11:41:31
Your sub can't reproduce 10 hz with any power. Not one in a million can.
Most can't even get down there.
Also, most subs are designed to survive the usual forms of abuse.
To be honest, my favorite test of a sub will always be Jurassic Park.
If you start to lose sphincter control, it's a good sub.
Follow Ups:
I have a Velodyne F1800R Servo that is supposed to have some response at 10 Hz. All I know is that various items throughout the room begin to vibrate very strangely during some organ pieces, and if I happen to walk in front of the woofers during testing, my trouser legs begin to flap around as if I'm in a gale wind.
But what I like about it is that there is no boom or obvious peaks. An auto stereo buff would say it's not putting out, because there's no boom-boom-boom. (I also use a 10-inch woofer with the center channel.)
Jim
I built a pair of subs using the coffin as a model.
I built them as 2 seperate cabinets using Peerless 85486 drivers.
10".
Using the BassZone test cd I could play 10hz to 85dbs.
When testing the subs I had to remove from the garage wall behind the subs because they would vibrate so badly. Thats almost 5' behind the subs firing direction. Pictures and objects on tables need to be removed or secured.
Our daughter would have to leave the house because she could not stand the
pressure waves. They made her sick. BTW she was downstairs in the basement!
Now I have transmission lines subs of a smaller size and power.
But their better in bass pitch.
Best way to achieve those low frequencies is said to go with an infinite baffle subwoofer. For around $1500, one can easily build a world class HT sub, as long as there is a space, outside the room, to mount the manifold.
I'll have one ...someday.
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