A low-frequency loudspeaker system based on a dipole principle. In some
implementations, the system includes an open frame rigging system and
multiple subwoofers mounted in a dipole surface array configuration in
the open frame rigging system to produce controlled sound dispersion in
both horizontal and vertical planes. The subwoofers are operable to
produce low-frequency sound dispersion below about 300 Hz. The subwoofers
mounted in the dipole configuration include a first set of subwoofers
facing a first direction and a second set of subwoofers facing a second
direction, in which the second direction is facing a direction that is
180 degrees with respect to the first direction. The second set of
subwoofers are wired out-of-phase with respect to the first set of
subwoofers to reduce non-liner distortion. The first and second sets of
subwoofers are configured to concurrently move in a same direction when a
signal is applied to the subwoofers.