On Mar 22, 8:57=A0am, "Alex" <apogo...@[EMAIL PROTECTED]
> wrote:
> "Andre Jute" <fiul...@[EMAIL PROTECTED]
> wrote in message
>
> news:2f7620eb-d14c-4441-9557-1a30cd197b59@[EMAIL PROTECTED]
> On Mar 22, 12:18 am, "S F" <S...@[EMAIL PROTECTED]
> wrote:
>
> > >Now here is a sub woofer.http://www.royaldevice.com/custom.htm
>
> >Now there's a guy who takes his music seriously! -- Andre Jute
>
> Given the lenght of the horn. the sound from the subwoofer will be
coming
> with a 30ms delay. Is it acceptable?
I wouldn't think 3/100 second delay is acceptable unless he is very
undiscriminating. He will have to make some arrangement to get a point
source, a faux point source, or an equal-length delay on the rest of
the audio band. I know of only two architectural horns that really
work, and I built one of those myself with a fullrange Lowther driver
particularly to avoid the delay problem. The other one I know of,
though it uses several drivers, is a reentrant horn with the drivers
arranged to give a faux point source. That is, neither horn uses
electronic delay lines (except that the midrange in the second horn
described is provided by QUAD stats which already have a delay line
built in).
The truth is that, while I admire this guy's singleminded enthusiasm,
in my own horns I have now given up the lowest bass frequencies in
order to have a balanced presentation which I can play 14 hours a day
without fatigue; my current horns are -3dB at 32Hz, which is vasty
more than good enough, regardless of what you will next hear clowns
squeak about how essential 20Hz is -- the same clowns don't have
speakers anywhere near as good as mine. And yet my latest horns have a
footprint of around 11x14in, which is pretty small for a horn: see the
HWAF horn at my netsite -- HWAF stands for "high wife acceptance
factor". One mate of mine landed in the divorce courts because he dug
up his wife's prize-winning garden for a horn out the back of the
house while that good woman was away visiting her mother.
Horns are difficult to get right though it must be said that the
bigger you can go, the easier it gets for the novice. However, when a
bigger is better approach leads you away from the point source into
multiple drivers that have to be aligned, you've just switched hands
on the rod on your back, you haven't gained anything.
Andre Jute
Visit Jute on Amps at http://members.lycos.co.uk/fiultra/
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