Originally Posted by dominguez1
Anyone? I'm really interested to hear thoughts around my question about max output curves:
Do max output curves typically have the same shape of the 'calibration' (AVR rumble tone) FR curves?
Below90, if no one has understood your graph above...please explain?
The response of most subs I've seen measured does change when you reach the limits. This can be caused by reaching excursion limits, limits of the port, amp limits or a limiter or protection circuit. Some change more than others. Here are some examples.
This is why I think it is important for people to not only measure their response at 75 or 80db, but keep raising it until compression. This will give an idea of the limits of your sub. Something else to keep in mind is these max output graphs are not necessarily the max short term output of the sub. The peak CEA2010 numbers and what you can reach during movies or music will probably be higher then the sweep numbers. One other thing you can see from their measurements is when the response starts changing, most of the time distortion increases dramatically.
I don't know if that answers your question, but look through Ricci's and Ilkka's measurements and you can get an idea of how the response of different subs change as the levels are increased.