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Well,
What pushed me into doing these tests and sharing them with everyone on this
web page was the myths and untruths that abound in this industry.. In this case
most installers already know that turning the woofer backwards usually makes
more
bass, but one *PROFESSIONAL* that writes for national magazines has written an
article that was in Car Stereo Review that claims that this cannot happen and
does
not happen!
Alls fine with me, I have seen so many lousy articles in the car
stereo magazines,
that article was to me just another guy trying to make a living selling articles
About something he may not really know about.
Well the writer turned up on the car stereo forums and
rec.audio.car some years
ago spouting the same stuff... Still didn't bother me... Then someone mentioned
to him that I had a web site that said turning box to aim to the back of the car
does make a difference.... So the guy started telling folks all over the
internet
that my article http://www.installer.com/tech/aiming.html was crap...
"Cartoons" he called it!
Ok, now I had to stand up for myself, I had a few exchanges with
the guy and
tried to explain it to him, typically I had several folks chiming in on my side
of the
arguments telling the guy I was right because they turned their woofer box
backwards and did actually get better bass. But he insisted I was wrong
and
there could not possibly be any difference no matter how the woofer box was
oriented...
He tried bullshitting me with his long list of credentials, he
tried
to quote out of an old obscure text book which he knew I didn't own a copy of!
But it turns out I DID have a copy of the same text book
http://www.installer.com/tech/naranek.html
which I scanned some data out of to prove he was trying to bullshit me into
submission.... That was kinda funny...
On the speaker box orientation thing though he simply would not
listen to me
or anyone else that told him that it does make a difference with the woofer
aimed backward... So I pretty much let him go about his biz until I had
some time to set up my test gear and show him ...
Well the above page is proof that it does make a difference how
your
woofer box is positioned and the guy ( Tom Nousaine by the way) now is
making all kinds of claims about how I doctored the sweeps and how it
cant possibly make any difference and blah blah blah.....
Well here is just a few examples of his statements, I know alot
of installers
read these tech pages of mine so maybe the next time you see an article
written by this guy in a magazine you wont be so quick to believe him..
thanks for viewing my pages - Eddie Runner
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Nousaine wrote:
> Because acoustic sounds at subwoofer frequencies (approximately 100 Hz) are
> omnidirectional the SPL/Frequency response will be uneffected either way.
Nousaine wrote:
> I've done the experiment several times. At subwoofer
> frequencies it just doesn't matter. How could it? At 20 hz the wavelength is
50
> feet long so the driver displacement just pressurizes the cabin no matter
where
> it's placed or what direction.
Nousaine wrote:
> So if your woofer is unfiltered you'll get significantly more lower and medium
> midrange output and perhaps increased audibility of port grunts and driver
> noises when the face of the driver is facing the listener. That's it. Try it
> yourself.
Nousaine wrote:
> While I'm at it let me dispell another Urban Legend. Do you get more bass with
> the hatch open? Only outside the car.
> Inside you get significantly less. Why? You lose the cabin gain transfer
> function effect whre the driver displacement pressurizes the interior at low
> frequencies delivering 12 dB/octave reinforcement as frequency falls below the
> lowest mode which occurs at 60 Hz in a small car.
Nousaine wrote:
> You can also read about alien visits on websites too. At bass wavelengths (17
> feet @ 60 Hz and much longer at lower frequencies) there just aren't any
> "cancellation" issues going on in the car cabin.
Nousaine wrote:
> The only
> advantage of subwoofer orientation is that facing the woofer/port away from
the
> listener reduces the possibility that mid-range sounds and driver/box/port
> noises will be less likely to be audible.
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