Duke (Audio"movement") covered lots of ground.
Yes, tilting the mid-tweet baffle (which unfortunately means that the drivers fire at the ceiling) is a way of geometrically aligning the drivers so the pathlength from their reference point to our ears is the same.
I don't know if the woofer presents much of a problem if it enters @~200 or lower; wavelengths are longer there and our ears weaker... so, a few mm difference would not be AS critical vs the wavelength as, say, at 3kHz (lambda=~11 cm). I would try to be more careful in the critical region 300-5kHz where our ear is most sensitive. Maybe that's the region Dynaudio was worried about?
{However, geometrical alignment isn't enough for a linear phase system; the crossover also plays its ugly role and, as Duke notes, a good contender here could be a first order Butterworth...}
OTOH, with drivers on the same plane one can achieve flat AMPLITUDE response -- maybe what the designers of such speakers intended in the first place??
Yes, tilting the mid-tweet baffle (which unfortunately means that the drivers fire at the ceiling) is a way of geometrically aligning the drivers so the pathlength from their reference point to our ears is the same.
I don't know if the woofer presents much of a problem if it enters @~200 or lower; wavelengths are longer there and our ears weaker... so, a few mm difference would not be AS critical vs the wavelength as, say, at 3kHz (lambda=~11 cm). I would try to be more careful in the critical region 300-5kHz where our ear is most sensitive. Maybe that's the region Dynaudio was worried about?
{However, geometrical alignment isn't enough for a linear phase system; the crossover also plays its ugly role and, as Duke notes, a good contender here could be a first order Butterworth...}
OTOH, with drivers on the same plane one can achieve flat AMPLITUDE response -- maybe what the designers of such speakers intended in the first place??
