Thanks for the post....but it still doesn't make sense to me. Anechoic...is theoretically "non-echo" in an open environment...like outdoors on a pole, as you mentioned. So rolloff due to chamber size makes no sense for anechoic measurements. The rolloff appears to be strictly related to the speaker performance. And it's down 3db at perhaps 70Hz in the M60 (as measured anechoically per Axiom specs).
Anyone else want to take a shot at this. Maybe I should contact tech support?
Thanks and good cheer. Still scratching my head.....
Beef
