AudioBanter.com - View Single Post

Eddie Runner wrote:

Nousaine dont know ****.

He claims turnng your box to aim to the back
in a car makes no difference.... he needs to get out more
into the real world... Every punk kid with a woofer box knows
it does!

Eddie starts in again. 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.

Eddies website claims that there's a 60 Hz standing wave error when a woofer is
faced one way or the other but he doesn't bother to explain how his
demonstration manages to show a standing wave when the sound waves are
traveling in the same direction. Or how that condition happens with a
wavelength of 17 feet.

I replicated his "diagram" outside with a ground plane and a single back wall.
The only thing that happens by placing a 12-inch woofer/1 ft3 box against the
wall facing out and compared to placing the box 3-feet from the wall facing
toward it is roughly 9 dB more output above 400 Hz and a 280 Hz cancellation
notch with the box facing the wall.

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.