Originally Posted by alacran
so no to 3k
what would happen to know that happen you suggest for 1k? on axis
The biggest thing to worry about IMO is the mounting location of each driver in a two way setup, if you plan on running a kickpanel 8" and an A pillar driver then you have to keep the crossover point low, to allow such a large distance between each point source.
Acoustical Interference pertains more to where a common signal in the same frequency range is reproduced by two physically separate sources, such as two drivers operating in the same frequency range, or the frequency overlap of two drivers in the crossover region. If the drivers are separated by a distance greater than ¼ (90 degrees) wavelength of the highest frequency being reproduced, then the time/distance issues that manifest themselves at those frequencies mean that at some angles relative to directly on-axis, their outputs combine in phase, and at some angles, their outputs cancel out of phase
The quarter wave distance of a 1kHz crossover is much larger than a 4kHz crossover, and since most 8" speakers exhibit some kind of cone breakup around 2-3kHz you won't want to use them above that range anyway (without some notch filters). If you can find a small mid-range that plays well from 2kHz to 16kHz you will be in good shape to set a 1kHz crossover point between drivers and have a lot of flexibility in mounting locations. With active processing and dedicated gain control it should be pretty easy to dial in relative volume levels even between speakers with very different sensitivity ratings, and with a bit of time delay adjustment you will be in very good shape.
The hardest part of SQ installs beyond that is deadening. 95% of your efforts should go to that aspect if you are looking for a hifi sound
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