I'm debating on whether to push the tweeter and mid back to time align with the woofers in my 4-way system. The problem is that I am building this in a cabinet so there will essentially be a shelf very close to the tweeter, I am going to be using felt to soften the baffle diffraction all the way across the baffle, at least that is my plan for now, so I can add felt to the top.
The question is this, is it better to have some damped reflection and no time alignment or is it better to have time alignment and some reflection?
The question is this, is it better to have some damped reflection and no time alignment or is it better to have time alignment and some reflection?
If you have a digital active setup, you DSP should allow you to enter Z offset / usec delay on tweeter and midrange to align the signal arrival, meaning you can have a flat baffle.
That top edge will cause some serious diffraction issues.
If you are going passive - asymmetrical crossover slopes can account for Z alignment issues.
In summary, nearly always choose a flat baffle over edges that would cause reflections / diffraction issues. Time alignment can be dealt with in the crossover.
That top edge will cause some serious diffraction issues.
If you are going passive - asymmetrical crossover slopes can account for Z alignment issues.
In summary, nearly always choose a flat baffle over edges that would cause reflections / diffraction issues. Time alignment can be dealt with in the crossover.
I'm big on TD due to low XO point horn systems, but not so much on multi-ways unless tuned low like a horn since it's easy enough to gap the XO up high for a tweeter. FWIW/IME, sloping at > 12 deg 'good enough' solves the problem, so you can 'have your cake and eat it too'. 😉
In side view, cut the lip up at an angle from the baffle, ending with a sharp edge at the top front, assuming you can get the desired angle and/or don't mind the lip having less overhang to achieve it.
You have also have tweeter/mid offset on baffle?
I suggest to make a test-baffle in cardboard. Then you Can judge.
I suggest to make a test-baffle in cardboard. Then you Can judge.