Yes, I realize that, but I was merely pointing out that these are different little buggers.
It's asked to do high down to upper lows and do it well. How well they operate depends on how much power you give them. As I said before, the mechanical limit what a speaker can handle does not imply a specific roll off. If you set the crossover at 60hz, it's power rating will be in the tank as it will distort and break at low power levels, as you increase the crossover, it will be able to handle more power without distorting. CA is recommending at if you are pushing it hard that you should be using 140hz, this does not imply the roll off is there, it implies that if you are using it towards it max power rating that you should have it there to reduce the risk of damage. This is the point I was making. CA is not at all inferring that the roll off is at 140hz yet Jim was using it that way.
I have a pair of Infinity's with a FR of 50-35,000hz +-3db. If I set my crossover to 65hz*, I could drive them harder without distortion, the woofer would reach it's limit before the other 2 drivers did and setting it at 65hz increased it's power handling. It's basically the same thing here, 140 so you can have an increased upper limit in power, doesn't imply roll off there just as the 65hz crossover for my Infinity's didn't mean roll off at that point.
*At college we wanted to see how loud we could play music (in a dorm mind you
) and we jury rigged some stuff together. Managed to get mine at least sounding the loudest, but we didn't have alot of choices; 35, 50, 65 and a 100hz I believe. Unfortunately the woofer was still the weakest link between the 65 and 100 point and really couldn't get any louder. On the plus side, we then hooked up all the systems we had on the floor together and managed to get a complaint from another dorm that was a good 100' away Edited by ien2 - 5/10/13 at 6:17pm