it makes total sense that they do add up, for some reason I think it does wonky things and it's not an exact doubling of the slope.
after reading all of this, maybe it was the frequencies that I was measuring that made me come to my findings, I was doing low tweet to upper mid range integration and had no measurable differences when adding a 12db slope to an existing 12db slope.


...oh goody, another weekend of testing is in order.


EDIT:.....just wondering if the lack of measurable difference for me was just the limitations (natural roll-off) of the driver?


...sorry for crapping my mindless thoughts all over your thread

 

lol ... It's all good. I was too lazy at first to just go try it myself, but sort of glad I did ask. There turned out to be some good information built off the topic and I'm sure I wasn't the only person who thought about this at some point.

The every 6db = 90 deg is great info. Should help in bringing my tweets in line with the doors MB.