Eric Desrochers wrote:

So, a typical in-car driver reproducing frequencies below 80 Hz in a
linear fashion *is* omni-directional and humans cannot locate it either.

It would seem to render moot any sub "aiming" concept...

Its NOT the same thing!
Your talking about something completely different!

The OMNI Directional you seem to be talking about is really
called LOCALIZATION.... Which means a human cant localize
low frequencies... In other words, its easy for us to tell where
highs are coming from, but as sound gets really low the source
of the sound is hard for us to find just by listening... This means
that in a room (or car) you can place the woofer anywhere you
want to and you wont mess up the imaging...

From a localization point of view, the location of the woofer in
relation to the highs is unimportant because the bass doesnt appear
to come from one place, it appears to come from everywhere..

The reason is because the distance between our two ears is
much shorter than the wavelengths for this bass.

On the other hand,
this thread isnt talking about that at all.!!

Its not being able to tell where the woofer is with yrou ear, it is
the woofer playing louder into the listening area by positioning the
woofer at the optimal place in the car...

I wrote a paper on it
http://www.installer.com/tech/aiming.html

Every kid with a car stereo knows the bass is better when the box is turned
around backwards so the woofer itself is closer to the back of the car.

Tom on the other hand says it makes no difference in the amplitude of
the bass in the listening area and all these folks must be imagining it....


Eddie Runner