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Join Date: Oct 2003
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"I ended up liking the 6dB, 20Hz, 1.5Q boost, and it seems to keep the excursion within the 34mm limit even at 2200W."
PEQ doesn't supply free power. to model excursion at power, turn off all eq/high pass etc. enter power. that will give you the max the sub will do no matter how much eq is put on it. a more advanced method is to put a high pass filter on at or just under the tuning frequency, then add a compensating amount of eq, such a peq: gain=3.5db, q=2.0, freq=tuning frequency.
by adding 6db of eq at 20hz, it simply means that you are likely to run out of power at 20hz before other frequencies. 6db is after all 4x the power. that's no biggie. 3db of it is probably just offsetting the reduction in spl that you experience by setting the highpass in the first place.