1 mount many full range speakers very close together
2 mount the speakers on a panel, baffle, or open back box. use an arc to avoid focusing
3 connect any combination of series parallel to make any impedance
advantages
1 deep bass from a large vibrating area moving a lot of air . limit is the low frequency reasonance of the drive units
2 extended high frequency response as the small mass of each small cone permits high acceleration
3 mutual radiation impedance
4 each cone handles a small part of the total energy, very small displacement, reduced nonlinear distortion, high power handling capability
5 no box coloration
6 bass response rolls off gently since an open back drops at only 6dB per octave
7 dipole radiation giving amazing sound scape imaging
8 no frequency distribution crossover network needed, no power loss, no phase or other distortion
9 projection as sound level of arrays drops slowly with distance
10 efficiency from back radiation, no passive components, 3, 9
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