The pic shows a baffle I added to thehornshoppe.com speakers.
They seem to make things sound better somehow. Perhap
they are compensating for baffle step loss from the narrow
6" baffle. The size was a complete shot in the dark, with
the speaker offset 1/2" from center. I can't help but
wonder what would be the ideal size and offset? Any
baffle step experts?
They seem to make things sound better somehow. Perhap
they are compensating for baffle step loss from the narrow
6" baffle. The size was a complete shot in the dark, with
the speaker offset 1/2" from center. I can't help but
wonder what would be the ideal size and offset? Any
baffle step experts?
An externally hosted image should be here but it was not working when we last tested it.
A reply from a cross-post I did on the Asylum forum...
"You've got two things happening. With a 6" wide baffle there's a 6dB diffraction step happening around 2KHz; an 18" ring the way you have it would lower that step to 800 Hz or so, giving a lot more mid presence. The second thing is Allison effect, the out of phase reflections coming back off the wall behind the box, which are also being pushed lower in frequency by that ring. If you want to maximize performance cut a hole in the wall and flush-mount the face of the cabinet with the wall. Now you have no diffraction step or Allison effect- but maybe one very pissed off landlord. "
"You've got two things happening. With a 6" wide baffle there's a 6dB diffraction step happening around 2KHz; an 18" ring the way you have it would lower that step to 800 Hz or so, giving a lot more mid presence. The second thing is Allison effect, the out of phase reflections coming back off the wall behind the box, which are also being pushed lower in frequency by that ring. If you want to maximize performance cut a hole in the wall and flush-mount the face of the cabinet with the wall. Now you have no diffraction step or Allison effect- but maybe one very pissed off landlord. "
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