Abstract: An improved loudspeaker assembly wherein one or more speakers are mounted in a closed cylindrical housing of air impervious material. When a plurality of speakers are utilized in an assembly, they are vertically spaced, with the central axis of each speaker contained in a respective radial plane and with adjacent radial planes having an included angle typically within the range of 15.degree. to 25.degree.. A preferred material for the cylindrical housing is laminated fibreboard.

Abstract: A compact portable high acoustic power loudspeaker system is described. A plurality of speakers are mounted inside an enclosure which is sealed. A passive radiator is also provided which is symmetrically disposed inside the enclosure relative to the speakers so as to be subjected to a generally uniform acoustic loading. A high compliance radiator is employed by dispensing with a central spider radiator support with a mass selected to obtain a high efficiency and good low frequency response. A foam gasket is used to help seal the enclosure while also serving to disperse high frequency sound and improve acoustic coupling opposite high frequency speakers.

Abstract: In a loudspeaker system having eight drivers on a baffle, the baffle has two port openings centered in respective squares embracing respective groups of four drivers. A tubular column extender snaps into each port opening and has a snap cap for detachably securing a polyester disk over the opening. A grill formed with two openings for accomodating the column extenders covers the drivers. A grill retainer formed with openings at each end for accomodating the column extenders abuts the grill, and clinch nuts screws on the threaded end of ach column extender to keep the grill retainer against the grill with the grill against the front baffle.

Abstract: A loudspeaker assemblage is made up of a group of cylindrical speaker housings, with a speaker mounted in each housing. A respective spacer in the form of a wedge block or angle sleeve is interposed between adjacent housings, so that housing end closures abut respective wedges. A flexible tension member passes through each speaker housing and spacer so that when the tension member is taut, the housings and spacers are clamped to make up a relatively rigid structure having a generally toroidal shape. The tension member is releasable so that the speaker housings can be rotated about a respective axis normal to the speaker axis to selectively orient the speakers. When the tension member is taut, the speakers are retained in the selected orientation.

Abstract: A loudspeaker system comprising an enclosure having first and second sidewalls, at least one of which is inclined to the vertical direction and at least one acoustic transducer adjacent each of the aforesaid sidewalls.

Abstract: A speaker system employs: a baffle board in front of a cabinet made of wood, with a woofer mounted on the baffle board; and a sub-baffle board having a medium-range speaker and a tweeter mounted thereon. The sub-baffle board comprises a metal board and a damping plate such as a rubber plate laminated on the metal plate.

Abstract: A loudspeaker system providing multi-directional sound distribution throughout all listening areas of a room. The system includes a housing with at least four high frequency loudspeakers arranged symmetrically about the center of the front section. High frequency sound is beamed from the loudspeakers at pre-determined angle toward the walls, floor, and ceiling of a room in order to optimize sound dispersion throughout the room. Each inclined panel is pivotally mounted to the housing and the housing includes an adjustment means for varying the incline of the panel. The loudspeaker system can thus be adjusted to disperse sound in a desired pattern which is selected depending on the shape of the room. The room may thus be fully saturated with high frequency sound which is normally directional in nature.

Abstract: A speaker apparatus which has a main speaker and at least one tweeter speaker in which a wire bridge member is used to support the tweeter speaker relative to the main speaker at a predetermined position therefrom. The wire bridge member is retained between the tweeter speaker and the tweeter speaker cover by pins which are heat staked. The wire bridge member has a circular center portion to accommodate the tweeter speaker and arm portions extending transversely and then inwardly at right angles for securing to the main speaker.

Abstract: A multiple driver loudspeaker system comprises two angularly spaced rear rectangular baffles each nearly filled with four closely spaced full-range small loudspeakers with a port tube passing through the center of each rear baffle and the junction therebetween. A front baffle carries a small centrally located loudspeaker. The front loudspeaker is backed by a cavity that is vented through the port tube at the intersection between the rear baffles. Each of the remaining loudspeakers is backed by a cavity with the four cavities associated with each rear baffle being vented through the associated port tube through channels located at the front of each cavity. Two bullets are cantilevered from the front baffle rearward and essentially concentric within the respective centrally located ports. The volume of each of the nine cavities is substantially the same.

Abstract: A multiple driver loudspeaker system comprises two angularly spaced rear rectangular baffles each nearly filled with four closely spaced full-range small loudspeakers with a port tube passing through the center of each rear baffle and the junction therebetween. A front baffle carries a small centrally located loudspeaker. The front loudspeaker is backed by a cavity that is vented through the port tube at the intersection between the rear baffles. Each of the remaining loudspeakers is backed by a cavity with the four cavities associated with each rear baffle being vented through the associated port tube through channels located at the front of each cavity. Two bullets are cantilevered from the front baffle rearward and essentially concentric within the respective centrally located ports. The volume of each of the nine cavities is substantially the same.

Abstract: A small dimension low frequency loudspeaker has a folded exponential horn which provides a unitary curved sound path from an electroacoustic transducer at the throat of the horn to a volume into which sound is radiated at the mouth of the horn. The length of the horn is such that, at an exponential rate of expansion between the throat and the mouth, the mouth, when it is bounded by at least one planar surface, such as a floor, a ceiling, and/or walls of a room, has adequate area to enable reproduction of low audible frequencies. An illustrative embodiment of the low frequency loudspeaker has an effective low end cut-off frequency of 55 Hz. A loudspeaker system, including a low frequency loudspeaker as well as midrange and high frequency loudspeakers and an LC crossover network, is also disclosed.

Abstract: A loudspeaker system which has a frequency response at any angle located about the speaker system which will be uniform such that the output sound pressure at any frequency from the speaker system will be as great or greater than the sound pressure from any other direction which comprises a reflected path from the speaker system. The speaker system includes a radial horn which radiates a spherical sector rotated 360.degree. through a horizontal plane is provided. One or two speakers are mounted so that they produce a pulsating cylindrical wave which feeds into the radiator and an inverted conical member is mounted in the transition portion between the pulsating cylinder and the output horn portion. This output is blended with similar wavefronts produced by a low fequency loudspeaker which is acoustically associated with a vented box. The vent is on the periphery of the box adjacent the low frequency loudspeaker and is narrower than the thickness of the walls of the box.

Abstract: A loudspeaker having precise imaging, neutrality of frequency response, and controlled mid-range and tweeter dispersion. The loudspeaker incorporates an open cell, reticulated polyurethane cartridge for placement of a supertweeter mounted in the loudspeaker at an angle of 45.degree. from other speaker axes. The housing therefore may be positioned so as to adjust the high frequency acoustic radiation to the right or the left of the loudspeaker frontal axis, thus making a mirror image pair of the loudspeakers possible. In addition, angled corner posts are arranged at the front corners of the loudspeaker in order to reflect back into the loudspeaker mid-range and high frequency sounds that strike the posts.

Abstract: A compact, multiple-element, high-fidelity speaker system for use in confined areas has electrically independent woofer, mid-range and tweeter elements mounted on a common frame with the mid-range and tweeter elements disposed in the conical volume of the woofer cone. Recesses in the woofer cone provide clearance for the drivers of the mid-range and tweeter elements.

Abstract: A loudspeaker cabinet system wherein at least two low frequency drivers of equal effective diameters are critically spaced a vertical distance which equals the effective piston diameter of one driver times .pi.. When so placed, the respective spherical wave fronts of the drivers interfere causing a composite elliptical wave front which being flatter than the spheric can reflect from walls without drastically changing its shape to produce a uniform field which reaches the listener without producing any areas of the room which appear acoustically dead. Such system is especially useful in small rooms having reflective wall surfaces. Once the low frequency drivers are critically spaced and aligned, a higher frequency speaker or array of higher frequency speakers can be positioned thereabout without destroying the quality thereof.

Abstract: A resonant loudspeaker system which produces improved reproduction of low frequency sound comprises a coupling chamber which encloses the rear of the low frequency driver and which contains two additional openings in which are suspended diaphrams free to move but coupled together so that the forces on them are in opposition. One of the diaphrams is baffled and the other is free to radiate. The air in the coupling chamber when excited by the low frequency driver can only act upon the difference in the areas of the diaphrams, but the radiation produced by the diaphrams is determined by the unbaffled area. The radiation from the rear of the low frequency driver is thus amplified permitting an improved combination of low frequency response, low distortion, electrical efficiency and physical size to be achieved.

Abstract: An audio speaker system designed to achieve multidirectional sound characteristics which includes an enclosure body having a base, front wall, two angled, forward sound directing side walls, at least one angled, inclined rear wall and a top wall which slopes downward from the rear wall to the front wall. At least one acoustic speaker is affixed to the top wall and to each of the front, side and rear walls of the enclosure body.

Abstract: A plurality of speakers are carried on a generally vertical board. The board is carried for pivotal motion about a vertical axis. The board is housed within an enclosure permitting sound radiation in all directions. Some speakers are directed to face oppositely from other speakers, all of which having a different operating frequency. One of the speakers is driven by a separate amplifier. The system is truly omnidirectional with acoustical phase problems being overcome because all but the high frequency drivers or tweeters have the same size.

Abstract: A high fidelity loudspeaker system involving a multidriver, semi-omnidirectional, full range, electrodynamic loudspeaker including two, separate but complementary, closed box-like enclosures, an upper unit containing an array of mid-range speakers around three sides and a lower unit containing arrays of low and high frequency speakers around three sides. The low frequency speakers (woofers) on their interior sides include a series of tubes opening into the closed interior of the speaker enclosure, having various lengths in accordance with certain relative, locational relationships. Although the low and high frequency speakers include a single crossover frequency circuit, the "mid-range" speakers are not included in any crossover network but are driven throughout the total frequency input range, although a capacitor can be included to cut off the very low frequencies to the mid-range speakers.

Abstract: Four speakers, each having a small thickness, are arranged so as to form a cubic arrangement. The four speakers form the four side surfaces of the cubic arrangement, with each of two diametrically opposed speakers extending at an acute angle relative to a vertical plane perpendicular to the other two speakers. A top panel connects the top edge surfaces of the speakers and has thereon means for attaching the system to a ceiling, or the like. In a modification of the invention, the speaker system is surrounded by a decorative housing having a top and bottom circular surface connected by four decorative posts. The four posts lie adjacent to the four corner edges of the cubic configuration. A grill cloth surrounds the front faces of the speakers for decorative and acoustical functions.

Abstract: A loudspeaker arrangement for radiating sound signals in an improved acoustical dispersion pattern includes mounting a plurality of speakers on a loudspeaker enclosure having a vertical axis. The speakers radiate sound signals in at least four directions normally to the vertical axis in the circumambient region of the enclosure, and at least one of the speakers is mounted in an upper region of the loudspeaker enclosure and radiates sound signals having at least a sound signal component in the vertical direction so that the high-frequency signal response above the enclosure is improved.

Abstract: A loudspeaker combination comprises a rectangular casing having mounted on its top wall a midfrequency speaker and two or more high frequency speaker devices. The midfrequency speaker is oriented generally upwardly with an angle of declination of less than 45.degree. from the vertical. The high frequency speakers are oriented generally horizontally, with a slightly upward inclination. The axis of the midfrequency speaker and of at least one of the high frequency speakers are slanted sideways in the same general direction. This latter speaker or speakers radiates at least substantially one-half of the total high frequency sound energy of the loudspeaker combination. The remaining high frequency speaker or speakers radiate in different directions, preferably toward an adjacent wall or walls. In one embodiment the midfrequency speaker device also radiates low frequency sound; in another, a separate low frequency speaker device is provided.

Abstract: The system provides improved bass response and stereo effect with the use of a plurality of speakers that are preferably disposed in a unitary cabinet. If two woofer speakers are employed they are disposed at an angle to each other and are disposed relatively close to each other to provide mutual coupling and improved bass response. Also, the speakers are spaced from a rear wall of the listening room so as to permit the coupling and also to enhance the spacial response by sound refelection from not only the rear wall but also the side walls thereby also providing improved sound realism through increased reverberation. Quadraphonic operation is also readily provided with the use of two cabinets.