Sean -
Thanks for posting the AR 9 owner's manual link! Great info in the room acoustics section. Methinks the folks at AR tore a page from the back of Roy Allison's notebook.
Another speaker that used a room-boundary-conscious woofer system design was the Snell Type A.
Back in '86 I built a pair of speakers using a 30" tall Gold Ribbon Concepts planar driver and a pair of 7" Focal woofers. To keep the front baffle area to a minimum, I mounted the drivers on the side. It was kinda cool looking - from the front, all you saw were the ribbons. The woofers were physically about 1/6 wavelength farther away than the ribbons at the 200 Hz crossover point, which was negligible. Both the woofers and the ribbon were loaded into transmission lines. If by any chance you have the 4/86 issue of SpeakerBuilder magazine, you can see a picture of it. In retrospect there were some radiation pattern discontinuities that I wouldn't tolerate today, but at the time I didn't know any better. Still, they didn't suck too bad.
Duke
Thanks for posting the AR 9 owner's manual link! Great info in the room acoustics section. Methinks the folks at AR tore a page from the back of Roy Allison's notebook.
Another speaker that used a room-boundary-conscious woofer system design was the Snell Type A.
Back in '86 I built a pair of speakers using a 30" tall Gold Ribbon Concepts planar driver and a pair of 7" Focal woofers. To keep the front baffle area to a minimum, I mounted the drivers on the side. It was kinda cool looking - from the front, all you saw were the ribbons. The woofers were physically about 1/6 wavelength farther away than the ribbons at the 200 Hz crossover point, which was negligible. Both the woofers and the ribbon were loaded into transmission lines. If by any chance you have the 4/86 issue of SpeakerBuilder magazine, you can see a picture of it. In retrospect there were some radiation pattern discontinuities that I wouldn't tolerate today, but at the time I didn't know any better. Still, they didn't suck too bad.
Duke