Wayne Parham Messages: 18871 Registered: January 2001
Illuminati (33rd Degree)
I wouldn't modify the plans unless you have good measurement equipment and time to setup the crossover. You have to take on-axis and polar measurements, to get good response and place the nulls outside the horn pattern. It is not a trivial matter.
If you want to design a speaker or to modify an existing design, here is a link that may prove helpful:
As for box dimensions, they are pretty important too for a full-range speaker this size. Standing waves develop, often creating ripples in response in the midbass or lower midrange, where damping material is ineffective. So cabinet size/shape and the positions of the midwoofer and port become important for mitigating response ripple.
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