I was working out the cutoff freq of an open back Guitar cab, when the following Q. occured to me: If you diminish the size of the opening on the back, when does that opening turn the cab into a helmholtz resonator? It's probably a 'how long is a piece of string' question, i.e. there's no sensible answer...???
Would it bother you to hear that both always apply to some degree? 🙂
I guess the answer is it becomes important when it begins to interfere in a significant way.
I guess the answer is it becomes important when it begins to interfere in a significant way.
Re:'both always apply to some degree' - just as I suspected, & probably irrelevant in a Guitar cab, where the rear reflections are likely as important as the front-back cancellation
I agree. With so many factors it's better to focus on those that are important and significant.
An open box can baffle to a lower frequency than a single panel of the same frontal size. It also allows the unit to be placed on a surface without falling over and provides a place for the amp and tone stack. Any helmholtz resonance is probably out of band and maybe irrelevant.
An open box can baffle to a lower frequency than a single panel of the same frontal size. It also allows the unit to be placed on a surface without falling over and provides a place for the amp and tone stack. Any helmholtz resonance is probably out of band and maybe irrelevant.