Nousaine wrote:
I don't know exactly what you did.
The test equipment is listed on the web page and
the test procedure as well.. Why dont you understand it??
http://www.installer.com/tech/aiming2.html
But why don't you explain to me how turning
an omnidirectional speaker in the other direction manages to increase sound
pressure?
Do you realize its not JUST turning the box, its also putting
the speaker (sound source) in a new loacation in the car.!
So, its more then just whether the woofer is omnidirectional or not.
In fact it HAS to have pretty much omnidirectional output (like you say)
for my other web page to have meaning...
http://www.installer.com/tech/aiming.html
Its because there is output from the speaker in all directions that
the problems with cancelation can occur!
BUT, its really the positioning of the omnidirectional woofer and
how the boundries and in car reflections cause different responses..
As plainly shown in my sweeps ..
http://www.installer.com/tech/aiming2.html
Have you invented a perpetual-motion machine? Please explain to me how any
subwoofer system manages to displace more air (increase sound pressure)
depending on which was its pointed? Does it get even louder if you turn it
around twice?
Your playing the part of the IGNORANT.... I think your just trying
to be funny...
ITS NOT THAT THE WOOFER GETS LOUDER when you
turn it backwards....
ITS THAT THE WOOFER IS LOWER (because of cancelations)
in the forward (and to many folks NORMAL) oreintation....
So by turning the woofer backward we lessen the cancelations
that are present when the woofer is aimed forward....
plainly shown in my sweeps
http://www.installer.com/tech/aiming2.html
The answer is that it cannot and it doesn't.
So, ae you saying my sweeps are wrong?????????
Are you still saying, moving a woofer box in a car
makes no difference in the woofer sound???
Most of the kids on here that have installed woofers
will tell you (and many already have) that the woofers
facing backward usually produce more woofer sound.
my sweeps show the same thing.
http://www.installer.com/tech/aiming2.html
Are you saying my sweeps are bogus Tom???
Stop your beating around the bush and come out
with it!!
I thought you had said you did all these tests before and your results
were just like mine....????
They are except I know how to keep conditions static between successive
measurements. And, yes, the distribution of energy below 60 Hz is exactly the
same.
my measurements ARE STATIC!
Except for box placement and sweep color there is NO CHANGE!
Comeon Tom, there were 4 witnesses to my sweeeps...
I didnt cheat!
But IF the distribution of sound prssure is identical at every frequency
exactly HOW does your woofer manage to generate more SPL with the same
amplifier power and the same Vd?
its MORE because there is LESS cancelation with the woofer
turned backward, just like I explain in
http://www.installer.com/tech/aiming.html
are you blind? I thought you had read this before?
You might also tell how you manage to tune those woofer systems so badly. I
find that getting relatively flat response to 10 Hz is pretty easy in a Jetta
or Beetle-like car.
I dont see any of your sweeps !!???
Your claims at this point are pretty much just worthless words!
Im the one shareing real data, your just mouthing off... Anyone
can just mouth off.... I was pretty quiet for quite some time
about this even though I knew you were wrong... Now that I
have REAL DATA, I am showing it to the world...
The box and woofer response is really irrelavent anyway, its
the comparison between the two sweeps thats the important data,
the difference!!
The box is a cheap pre-fab
The speaker is an inexpensive but very reliable Memphis 12.
Thats ALL that was playing in the car, just the one 12.
It was played by the Crown pro amp, which was driven
directly by the LMS Oscillator...
I didnt spend ANY time worrying about trying to make the
response FLAT, all we did was use it as a test box to show
YOU that there is a difference with box placement in BASS
in a car!
Eddie Runner