Abstract: Described is a vented speaker driver assembly utilizing a speaker driver having a pole piece that defines therein a vent that is not covered by a dust cap. The frame of the speaker driver is configured to be mounted to a structure's surface such that the pole piece of the driver is located within the structure's interior space. The vented speaker driver is configured to be utilized in a back-to-back vented driver assembly wherein the sound of more than one speaker driver is achieved in a footprint of only one driver and with minimized generation of physical vibrations from the assembly.

Abstract: Described is a vented speaker driver assembly utilizing a speaker driver having a pole piece that defines therein a vent that is not covered by a dust cap. The frame of the speaker driver is configured to be mounted to a structure's surface such that the pole piece of the driver is located within the structure's interior space. The vented speaker driver is configured to be utilized in a back-to-back vented driver assembly wherein the sound of more than one speaker driver is achieved in a footprint of only one driver and with minimized generation of physical vibrations from the assembly.

Abstract: Disclosed is a speaker system for installation within a ceiling, wall, or other structure. The speaker system includes at least one pair of woofers housed by a woofer housing. The two woofers of each pair are oppositely arranged relative to one another so that the vibrations generated by each during operation are essentially neutralized or eliminated. Attached to the woofer housing is a mounting frame to which is attached a driver, such as a tweeter, a combination tweeter and midrange, or another woofer. This driver is perpendicularly arranged to a woofer pair. When installed, the woofers are positioned within the ceiling or other structure in which the system is installed.

Abstract: Disclosed is a free air magnetic circuit and speaker in which no pole piece is used. A magnet layer is located between a top plate and a back plate with a gap defined essentially in the center thereof. Into the gap, a wire coil attached to a diaphragm may be inserted. A magnet flux passes between the top and back plates. In some embodiments, the interior edge of each of the metal plates tapers toward the gap, and the magnet layer extends past the peripheral edge of each of the metal plates so as to discourage magnetic flux between the metal layers at the peripheral edge.

Abstract: Disclosed is a speaker system for installation within a ceiling, wall, or other structure. The speaker system includes at least one pair of woofers housed by a woofer housing. The two woofers of each pair are oppositely arranged relative to one another so that the vibrations generated by each during operation are essentially neutralized or eliminated. Attached to the woofer housing is a mounting frame to which is attached a driver, such as a tweeter, a combination tweeter and midrange, or another woofer. This driver is perpendicularly arranged to a woofer pair. When installed, the woofers are positioned within the ceiling or other structure in which the system is installed.

Abstract: Disclosed is a free air magnetic circuit and speaker in which no pole piece is used. A magnet layer is located between a top plate and a back plate with a gap defined essentially in the center thereof. Into the gap, a wire coil attached to a diaphragm may be inserted. A magnet flux passes between the top and back plates. In some embodiments, the interior edge of each of the metal plates tapers toward the gap, and the magnet layer extends past the peripheral edge of each of the metal plates so as to discourage magnetic flux between the metal layers at the peripheral edge.