I never really understood box rise
"This proves to be very important, since a loudspeaker with a nominal impedance of 4 ohms will sometimes have an actual impedance of 1 ohm or less." -Jacob Fuller of Sundown Audio
Why "daily" systems should not count on impedance rise - SSA Car Audio Forum
you make statements as fact without supporting information. you may know and are just too lazy to back it up, or you may just be regurgitating information you don't understand. regardless, i have decided to ignore all of your statements until i see a reason to do otherwise.
can box rise be calculated? of course it can. it's just physics. i could write a program to do that if i wanted to spend the time, which i don't, and neither does anyone else.
To sum up what he said, "you said there are no programs that accurately calculate rise in a real world install.... that's true but there could be, and I could even write it... but I won't and neither will anyone else". Thus confirming that what I said is true. LMAO.
One time my box rose a WHOLE INCH! The best way to stop it is with L brackets. ;)
you feel this way because you don't understand it. you can't calculate something you don't understand.
physics is predictable and can be represented with mathematics.
solving wave equations (differential equations) is time consuming.
no one cares that much about car audio to predict something that can be measured easily.
just because no one bothers to calculate something doesn't mean it cannot be modeled accurately.
my summary is that box rise is better measured than calculated - though you can predict it with enough effort.
You waited a month or so to do it, after I showed no activity. It's safe to say you didn't want to get my attention.
People really shouldn't worry about rise IMO.