Anjora, congratulations are due for your role as the best observed and most committed WUM we have seen on the forum so far.
10 years and counting.
bulding the ultimate diy system
- Thread starter anjora
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Anjora, congratulations are due for your role as the best observed and most committed WUM we have seen on the forum so far.
10 years and counting.
James
Lord of the Erg\o/s
Fluff, more like.
My only hope is that your Swedish makes more sense than your English.
cooky1257
pfm Member
93dB is pretty high. With 8 bass drivers it's 111dB at 15hz, not sure if there will be any room gain @15hz though. http://www.avsforum.com/t/1314884/8x-18-lms-ultra-5400s-in-4-sealed-enclosures
8 stereo integrity ht18d2 / channel could be just as good.
Apologies it was 99.8% 3rd harmonic at 10hz for 93dB
rbrown
I think therefore I think I am
Thanks for the laugh anyway. It was like a feature length episode of Roobard and Custard.
the spl would be higher if it wheren't for the unliniarity(about 3dB higher), so 8 drivers should look a lot better.Apologies it was 99.8% 3rd harmonic at 10hz for 93dB
Just for a laugh I thought I would find out how long a 1Hz organ pipe is.
More than 170 metres.
http://hyperphysics.phy-astr.gsu.edu/hbase/waves/opecol.html
As the height of the choir at York minster is 31 metres the pipe would look rather odd stuck out of the roof by 140 metres. In fact the pipe wouldn't fit along the length of the whole building. Folding the pipe would take up a bit of space as well as the Olympus engine to move sufficient air.
Actually if you use exhaust gases from a jet engine the pipe would have to be even longer.
More than 170 metres.
http://hyperphysics.phy-astr.gsu.edu/hbase/waves/opecol.html
As the height of the choir at York minster is 31 metres the pipe would look rather odd stuck out of the roof by 140 metres. In fact the pipe wouldn't fit along the length of the whole building. Folding the pipe would take up a bit of space as well as the Olympus engine to move sufficient air.
Actually if you use exhaust gases from a jet engine the pipe would have to be even longer.
PigletsDad
My intelligence test came back negative.
The Sydney town hall organ, and one in Atlanta (no longer playable) have "64 foot" stops, which have a lowest note at about 8Hz.
Most other big organs have a 32foot stop, which goes down to 16Hz.
Most other big organs have a 32foot stop, which goes down to 16Hz.
http://www.sydneyorgan.com/STH64.mp3
This is the Sydney 64 foot stop. I think you would describe it as inconsequential and barely makes it to the description of musical.
I think the pipes are blown from the bottom in most cases, which makes the frequency prediction difficult for my brain. No, impossible for my brain.
This is the Sydney 64 foot stop. I think you would describe it as inconsequential and barely makes it to the description of musical.
I think the pipes are blown from the bottom in most cases, which makes the frequency prediction difficult for my brain. No, impossible for my brain.
PigletsDad
My intelligence test came back negative.
More or less, they are quarter wave resonators, so the 64 foot stop has a free air wavelength of about 256 feet. Speed of in air is (very) roughly 1000feet/s, so 256 feet is close enough to 4Hz.
david ellwood
Kirabosi Kognoscente
It's 8hz that's supposed to stick in the brain!
Nic Robinson
Moderator
All this fuss so the guy can listen to the 1812 and some organ music. Jeez.
Oh come on Nic, some of us are having fun here.
I'm saving up for a canon or two. Er, that's cannon. Just bought a panasonic....
david ellwood
Kirabosi Kognoscente
Is not something like this a more cost effective and efficient solution?
http://youtu.be/E7Bkrypxzs4
http://youtu.be/E7Bkrypxzs4
If your swedish is up to speed:
http://www.faktiskt.se/modules.php?name=Forums&file=viewtopic&t=54510
http://www.faktiskt.se/modules.php?name=Forums&file=viewtopic&t=54510
Nic Robinson
Moderator
His speakers will certainly go low and high, and the prat element goes without saying.
no i don't think it's more cost effective, also it is limited to below 20hz, also it's more difficult to get it homogenious over the entire room with a fan sub.
i guess it was a mistake only alternate between 2 different nicks on for all forums, to late now..