David, you need to clarify if you are looking for input stricly about "front firing line arrays" ( like the Dali primarily is ) or "full range dipolar line sources" as they are VERY different beasts. After all, the Dali is "front firing" for the lows and a good portion of the mids. It only becomes "dipolar" at frequencies above 1.2KHz.
I also think you need to clarify what you mean by "point source" i.e. single driver full range speakers or "standard" front firing multi-ways that are designed to work as a point source due to limited dispersion characteristics. A point source to me is a single driver or possibly a co-axial / tri-axial type driver. Others may think differently, but greater specificity would clear the air : ) Sean
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PS... Someone from these forums asked me to check these speakers out for them a few months back. You should be aware that even though they use an active crossover between the cones and the ribbon, the ribbons are NOT "direct drive" from the amp. That is, everything above 1.2 KHz is fed to the ribbons courtesy of a capacitor. To me, this is a drastic mistake. I'm sure that they did this as a measure of protecton i.e. trying to keep DC voltages from a "leaky" amp from damaging the ribbons. These speakers are also of a rear ported design, so keep that in mind too.
I also think you need to clarify what you mean by "point source" i.e. single driver full range speakers or "standard" front firing multi-ways that are designed to work as a point source due to limited dispersion characteristics. A point source to me is a single driver or possibly a co-axial / tri-axial type driver. Others may think differently, but greater specificity would clear the air : ) Sean
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PS... Someone from these forums asked me to check these speakers out for them a few months back. You should be aware that even though they use an active crossover between the cones and the ribbon, the ribbons are NOT "direct drive" from the amp. That is, everything above 1.2 KHz is fed to the ribbons courtesy of a capacitor. To me, this is a drastic mistake. I'm sure that they did this as a measure of protecton i.e. trying to keep DC voltages from a "leaky" amp from damaging the ribbons. These speakers are also of a rear ported design, so keep that in mind too.