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Infinite-baffle sub-woofer using pipes
- Thread starter RomfordNavy
- Start date
I'm not sure what you're saying or how it applies to the discussion. My chiming in was only to alert the OP to the potentially significant effect of any mounting scheme other than on an ideal infinite baffle. By way of example, I mentioned discussions of TLs that went on in the '70s. The definition of infinite baffle is not really at question as far as I know.
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Hi
Infinite Baffle fan here..
The best resource I know of,for IB is this 27 years old site. Dedicated and serious. They have been providing really serious information about IB and how to build these.. And yes, a well executed IB is "all that" .. Can go stoopid low: single digits at 100 +dB at the listening position at electronics level THD < 1%, is common with multiple drivers .. IB can provide prodigious amount of bass at very low, Frequencies, enough to be dangerous to many houses structures... . Click on the following
That idea to use tubes to vent the back wave toward an infinitely large space .. has some validity, It is called a manifold.. The manifold needs to have a certain cross-section with respect to the displacement and size of the woofers ... I do not remember how large it should be; If you only use several tubes and nothing else .. i is a transmissions line.. Another type of subwoofer loading ... Not an IB...
Infinite Baffle fan here..
The best resource I know of,for IB is this 27 years old site. Dedicated and serious. They have been providing really serious information about IB and how to build these.. And yes, a well executed IB is "all that" .. Can go stoopid low: single digits at 100 +dB at the listening position at electronics level THD < 1%, is common with multiple drivers .. IB can provide prodigious amount of bass at very low, Frequencies, enough to be dangerous to many houses structures... . Click on the following
"Cult of the Infinitely Baffled" Hear The Bass, Not The Box The definitive online resource for Infinite Baffle subwoofer design Established 1999
That idea to use tubes to vent the back wave toward an infinitely large space .. has some validity, It is called a manifold.. The manifold needs to have a certain cross-section with respect to the displacement and size of the woofers ... I do not remember how large it should be; If you only use several tubes and nothing else .. i is a transmissions line.. Another type of subwoofer loading ... Not an IB...
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If I understand the question correctly, the speaker will be installed in a pipe and radiate into the room, and the open end of the pipe will radiate into the basement or attic. Let's take a simple calculator and look at this. We will use quite a subwoofer-ish 18" subwoofer driver and empty 2.5 m tube.
Sound power (2 pi anechoic, not to be confused with frequency response in a room) radiated into the room:
Sound power radiated into the attic (here, a horn means the open end of a pipe):
ps: Is it possible to install average usual common regular IB sub(s) in these locations? The small volume in front of the driver won't create significant problems in the subwoofer range.
Sound power (2 pi anechoic, not to be confused with frequency response in a room) radiated into the room:
Sound power radiated into the attic (here, a horn means the open end of a pipe):
ps: Is it possible to install average usual common regular IB sub(s) in these locations? The small volume in front of the driver won't create significant problems in the subwoofer range.
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