I have been searching around for info on the roll off characteristics of the infinite baffle form of loading. I'm interested in what it would be under idealized conditions. Like if a woofer was mounted in the middle of an old drive in movie screen out in wide open space. Although I don't know much about IB, I would assume that this ideal is seldom realized because if it is firing into a room....then that's an enclosure right there. Under the above described "drive in" conditions I have recently heard it asserted that the roll off is first order(6dB/octave). Is this true?
Many thought he was incorrect because he represented infinite baffle as first order. They were of the opinion that it was second order...I was unsure. The literature tends to speak of "infinite baffle" when they are actually referring to a sealed enclosure where the compliance of the box offers less restorative force on the cone than the driver suspension. But the "infinite Baffle"sealed box example and a true theoretical infinite baffle are, I believe, two different beasts. However,As you said, the theoretical is very hard to realize. Thanks for clearing this up. I was hoping that the poster of the video had his facts straight because I found the subject matter he was presenting very illuminating.