All speakers <have> resonance
Isn’t that the truth, there’s no escaping it, the best that can be expected is to use engineering control measure to lesson it as much as possible.
One way, the way I was shown, is to divide the larger surface areas into smaller nodes, this attenuation to specific nodes hopefully lessens the amplitude of the energies and divides the panels into smaller zones. The differential bracing should never be evenly spaced, creating multiple nodes not relatively close to the same frequency of another.
Just as using the same drivers to accomplish more SPL for the same frequencies, these cabinet nodes will sum to produce more cabinet resonances. Divide and conquer isn’t a joke when bracing an enclosure.
mahgister I’m glad you tried loaded mass speaker isolation, I’m guessing you’re glad also??!!
My system has come leaps and bounds since I’ve been learning from forum members here. The importance of all sorts of things I’d never really considered important have become the most transformative things I hear working, by taking out the sonic trash so to speak.
@holmz - thanks