Abstract: An improved loudspeaker system which increases low frequency directivity and minimizes directivity discontinuities during frequency transitions includes a first low frequency transducer, a second low frequency transducer, a middle frequency transducer assembly and a middle frequency horn assembly having a small input aperture and a large output aperture. The middle frequency transducer assembly is attached at the small aperture of the horn assembly and directs a middle frequency acoustical signal into the horn assembly. The low frequency transducers and are mounted to opposite interior surfaces, preferably the top and bottom surfaces, of the horn assembly, and direct a low frequency acoustical signal into the horn assembly. A composite acoustical signal directed out of the horn assembly from the large aperture. The distance D.sub.1, measured from the upper transducer voice coil to the lower transducer voice coil, is substantially equal to 0.9048 of the distance D.sub.

Abstract: A miniaturized speaker apparatus including a cabinet to which a first speaker unit for reproducing a low frequency range is installed; second speaker units for reproducing a medium frequency range and/or a high frequency range; and supporting members for supporting the second speaker units on their tip end sides, the supporting members being supported by the cabinet so as to rotatably move between a first position, where the second speaker units are spaced apart from the cabinet, and a second position, where the second speaker units are positioned on the cabinet side making the speaker apparatus convenient for carrying.

Abstract: A speaker assembly is disclosed. The speaker assembly employs a unique design permitting reduction in the size and weight of the speaker assembly, while maintaining high fidelity sound. The speaker incorporates inverted midranges, with opposed tweeters to produce high fidelity stereo sound. The speaker assembly also includes a strain relief member which reduces the weight of the speaker assembly. The speaker assembly also includes a pair of inductors with securing bolts running therethrough to increase the efficiency of the induction coils and permit the inductors to function as structural spacer.

Abstract: A speaker propagating sound waves in the manner of a point source. The speaker includes high, medium, and low range drivers vertically arranged within a vertically arranged tubular support member having sound escape openings in its lateral wall. The high and medium range drivers project sound upwardly, and the low range driver projects sound downwardly. The speaker has a truncated obeliskoid housing including a chamber disposed below the low range speaker. This chamber is muffled to absorb non-coherent sound, and has a vertical air tube for managing air flow within the chamber and conducting sound waves downwardly from the housing. The high range driver is exposed above the housing, so that sound projects upwardly therefrom. Sound produced by the medium range driver passes through the openings in the tubular support member. The housing is supported on casters for mobility.

Abstract: Improved loudspeakers, systems and components are adapted to interconnect with many forms of communication media. In one embodiment, a speaker is mountable within a receptacle. The speaker includes a magnetic driver and a diaphragm mounted to a frame. The frame includes a mounting member extending from a surface of the frame behind the flange plane. The mounting member is engagable in a notch formed in the receptacle for securing the speaker within the receptacle. In another embodiment, a low-profile loudspeaker has a front-mounted magnetic driver disposed within a cone-shaped acoustic diaphragm. The magnetic driver includes a first rare earth magnet centrally disposed within an electromagnetic shielding material. In another embodiment, a low-profile, two-way loudspeaker includes a cone-shaped diaphragm and a dome-shaped (tweeter) diaphragm. A front-mounted magnetic driver comprises first and second rare earth magnets each centrally disposed within electromagnetic shielding material.

Abstract: A throat device for interconnecting at least two drive units and a horn is provided. The throat device comprises a substantially straight body member having one end to be coupled with the horn, and at least two curved branch members coupled with the other end of said body member such that no phase interference occurs in a high frequency sound range.

Abstract: A multiple cone type loudspeaker having a construction including a plurality of vibrating plates and a plurality of baffle plates protruded forwards from an enclosure of the loudspeaker. Each of the baffle plates serves to effectively isolate both spaces respectively defined at front and back sides of each corresponding one of the vibrating plates protruded forwards beyond the front surface of the enclosure. As a result, there is no phenomenon that the density of air is equalized in both spaces respectively defined at front and back sides of each vibrating plate as the vibration of the vibrating plate is continued. Accordingly, it is possible to achieve an extension in regeneration band, an improvement in directivity and a generation of dynamic sound.

Abstract: The efficiency of a vertical array speaker device is raised to obtain an adequate level of sound and to confine the horizontal radiation of the listening area of a surround sound system. A pair of baffle boards are mounted to a vertical array (4) with small diameter speakers (3), in symmetrical opposition, the boards are attached together at their rear edges (1a, 1b,) while the front edges are held open a predetermined width.

Abstract: A sound reproduction system is disclosed that uses a single pair of compact speaker enclosures to provide surround sound for a multimedia computer workstation. A pair of stereo speaker enclosures provide the computer screen's monaural center channel to a viewer seated at the workstation, as well as pairs of stereo-imaging and stereo surround channels.

Abstract: A loudspeaker system overcomes disadvantages of prior art systems. To adjust for undesirable room acoustics, high frequency slope compensation is provided which reaches its plateau well beyond the highest audible frequency, providing a more accurate audio reproduction. Electronic filtering increases the high frequency components beyond the audible range, to drive a single set of high frequency acoustical drivers to properly compensate for high frequency attenuation due to room acoustics. Alternatively, a dedicated high frequency acoustical driver provides the high frequency emphasis to compensate for room acoustics, with another set of high frequency acoustical drivers accurately reproducing the audio signal.

Abstract: An audio loudspeaker system is provided which consists of an enclosure having a front wall, a rear wall with a plurality of circular openings, a pair of side wall, a top wall and a bottom wall. A plurality of loudspeaker components are supported on the front wall of the enclosure for radiating sound energy therethrough and having varying frequency ranges. A plurality of tubular ducts are supported in the circular openings in the rear wall and extend inwardly into the enclosure to exhibit a tuned acoustic frequency to the loudspeaker components having the lowest frequency ranges.

Abstract: The present invention is a multi-chamber two-way center channel speaker for an audio system which has four stereo surround sound channels including a right front channel, a left front channel, a rear surround channel and a center channel. The preferred embodiment of the present invention center channel speaker comprises a VCR shaped cabinet having three parallel interior chambers including a front chamber, a middle and a rear chamber, all interconnected by offset openings. A tweeter and two midranges are installed in the front chamber. The rear chamber is vented through a rear opening. The volumes of the three chambers are expanded. This design and construction makes the three interconnected chambers a bass-reflex enclosure having gradually expanded volume for amplifying the backload of the two midranges.

Abstract: A compound driver loudspeaker system combines a single exterior radiating loudspeaker with a plurality of internal auxiliary loudspeakers in a cabinet. The cabinet has an external baffleboard and an internal baffleboard, the external baffleboard having a single baffle cutout for receiving the radiating loudspeaker and a plurality of internal baffleboard cutouts for receiving each of the auxiliary loudspeakers. The baffleboards and loudspeakers define a desirable air chamber between them. The auxiliary loudspeakers are selected to be smaller than the radiating loudspeaker and the number of auxiliary loudspeakers is such that, taken together, they form an equivalent single driver which is matched to the radiating loudspeaker to provide the desired frequency performance of the loudspeaker system. Since the auxiliary loudspeakers are smaller than the radiating loudspeaker, the baffle cutout in the external baffleboard is larger than the cutouts in the internal baffleboard.

Abstract: The present invention is a dual-chamber multi-channel speaker for an audio system which has four stereo surround sound channels including a right front channel, a left front channel, a rear surround channel and a center channel. The preferred embodiment of the present invention speaker dual-chamber multi-channel speaker comprises a VCR shaped cabinet having a front chamber and a rear chamber, each being an independently sealed enclosure. A tweeter and two midranges are installed in the front chamber for producing sound effects of the center channel of the audio system. A subwoofer is installed in the rear chamber for producing low frequency sound effects of the right and left front channels. The center channel drivers are front-firing. The subwoofer may be up-firing or down-firing.

Abstract: A sonic wave generator includes at least one pair of concave acoustic baffles arranged in concavely facing relationship in mutual coaxial alignment. The facing acoustic baffles of the pair are spaced apart from each other by a predetermined distance so that an annular opening is formed between the peripheral edges of the openings of the facing concave baffles. A driven diaphram is located at the closed end of each audio baffle opposite the open end of the baffle. The driven diaphrams located in the baffle pair face toward each other in mutual coaxial alignment and in coaxial alignment with the acoustic baffles.

Abstract: A modular loudspeaker system of uniformly sized and shaped loudspeaker modules permits hanging of a plurality of the modules in a wide variety of desired configurations. Each module has a pair of side walls with recessed upper and lower marginal edge portions and an integrally formed reinforced connectable structure that spans between the recessed edge portions for reinforcement of the module across its side. When several modules are hung vertically, the vertically aligned reinforced connectable structures reinforce the system along its entire length. Three module types are disclosed, with one type adapted for removable mounting therein of a speaker horn via a quick release hub. Overall, the system provides optimum versatility in adapting to the acoustical requirements of a wide variety of performance venues.

Abstract: A speaker system comprises a pair of speakers for a higher frequency range and a pair of speakers for a lower frequency range. The speakers for the lower range are disposed with a space d.sub.1 equal to the wavelength .lambda..sub.c of a division frequency f.sub.c of a reproduction frequency range, and speakers for the higher range are disposed with a space d.sub.2 =d.sub.1 /4 to d.sub.1 /2 in the middle of the lower frequency speakers. Another speaker system comprises a speaker for reproducing signals in a lower frequency range of a reproduction frequency range to be reproduced, and a speaker for reproducing a higher frequency range of the frequency range, wherein a sound path dividing construction is provided for dividing the sound path of each of the speakers into two paths to provide openings for the lower frequency range and the higher frequency range. The openings for the lower frequency range are disposed with a space d.sub.

Abstract: An open line source speaker system includes a first columnar cabinet enclosing a plurality of midrange or woofer speakers arranged in the cabinet in a vertical line and a second columnar cabinet enclosing a plurality of tweeters arranged in the cabinet in a vertical line, with the first and second cabinets being spaced a predetermined distance from each other by a pair of spacing elements and the base portion of the speaker system supporting the first and second cabinets. The vertical height of the speakers will be such as to offer a large listening window of approximately floor height to well above the listener's head. All frequencies of the music originate from the same plane as positioned from the listener thus maintaining correct time/phase relationship and correct stereo image in both the horizontal and vertical planes regardless of musical frequency.

Abstract: A loudspeaker with a pair of speaker units and a manifold chamber between the speaker units for combining the sound from both speaker units. The manifold chamber is formed by walls having an exit opening and a pair of rectangular apertures, the apertures confronting each other on opposite sides of the chamber and the exit opening being disposed normal to a plane centrally between the apertures, and the apertures and exit opening having parallel axes of elongation. One of the speaker units is coupled to each of the apertures to direct sound into the manifold chamber, and the manifold chamber is provided with a wedge confronting the apertures to direct sound parallel to the central plane between the apertures toward the exit opening. In one construction, a horn is coupled to the exit opening to conduct sound from the manifold chamber.

Abstract: An omnidirectional speaker unit includes a housing having a plurality of twelve identical sides each having a speaker mounted therein and equally spaced around and directed outward from a common point with all speakers connected to operate in unison to provide a spherical dispersal of sound. A preferred embodiment of the invention is the intersection of six equi-distant identical hyperboloids of two sheets creating horns that merge at unique saddle-like curves between adjacent horns of the enclosure with each speaker placed at the end of a long hyperboloid horn.

Abstract: A tower-type speaker cabinet assembly for plural speakers of a high fidelity audio system, including a vertically elongated tower cabinet having a pair of front wall segments adjacent the uppermost and lowermost ends of the tower speaker cabinet and an intermediate forwardly opening cavity extending between the upper and lower front wall segments, a pair of vertically spaced large subwoofer speakers in the respective upper and lower front wall segments with associated inner cabinets forming sound boxes therefor, and a swivelled movable center subcabinet spanning the vertical distance between said front wall segments, having a woofer, a mid-bass speaker and a pair of tweeters carried by a front wall portion of the center subcabinet in vertical alignment. The subcabinet has a range of swivel movement horizontally through predetermined angles about a vertical axis located a short distance rearwardly from the front wall of the swivelled subcabinet.

Abstract: Going inwardly from the outside, the walls of the housing comprise a multi-ply slab, one or more layers of elastomer coating, a plate of amorphous bitumen, and acoustic screens constituted by substantially contiguous parallel tubes which are filled with a solid material which is in the divided state and highly compacted, e.g. sand, or particles of graphite, or grains of silica. In addition, the enclosures include one or more blocks behind the loudspeakers and made of cellular foam with channels passing therethrough parallel to the axes of the loudspeakers.

Abstract: The invention comprises a microphone and loud speaker system in which the components include a cylinder having a center section and an end section at each end of the center section in axial alignment with one another. The adjacent ends of the center and end sections are elliptical and lie in planes oriented at an angle of 35.degree.16' to the longitudinal axis of the module, the long axes of the ellipses are oriented at 45.degree. to horizontal. The planes of the elliptical ends are substantially isomorphic to the tympanic membrane of the human hearing structure and represent half the dihedral angle of a regular tetrahedron. All of the loudspeaker transducers are shielded by sheilding cylinders with elliptical end faces lying in planes oriented, at half the dihedral angle of a regular tetrahedron, namely, 35.degree.16' to the axes of the cylinders, with the long axes of the ellipses oriented at 45.degree. to the horizontal.

Abstract: A planar loudspeaker system having an elongated and substantially planar enclosure, configured to house tweeter, midrange, and a pair of upper and lower woofer diaphragms in its median, longitudinal section. A pair of woofer labyrinths, acting as quarter-wave transmission lines, extends throughout the remainder of the enclosure's volume. The labyrinths vent the substantially in-phase backwaves forwardly, toward the listener, through a pair of shared ports in the mid-frontal region of the enclosure. An electro-magnetic drive unit, employing bar magnets, pole pieces and thin encapsulated moving coils, all of elongated and symmetrical configuration, is also disclosed. Three versions of the drive unit are shown, each being adapted to provide a distributive driving force to the planar diaphragms of the loudspeaker.

Abstract: Audio speaker apparatus includes a chamber portion, a sound generating portion, a sound distributing portion and a positioning portion. The chamber portion includes a generally transverse face section with a housing section extending from adjacent the periperhy of the face section along a centerline of the chamber portion. The housing section includes wall elements converging from the face section. The face section and the housing section form a speaker chamber. The sound generating portion includes a low frequency range speaker mounted adjacent the face section and facing outwardly therefrom. Middle frequency range and high frequency range speakers are mounted adjacent the housing section intermediate the length thereof with the mid-range and high range speakers facing in a direction different from the low range speaker. The sound distributing portion includes a deflecting member disposed directly outside the low range speaker and closely adjacent thereto.

Abstract: A loudspeaker system for low frequencies has a manifold chamber into which oppositely mounted and aligned woofer units radiate sound. The chamber radiates the sound perpendicularly to the woofer axes, either directly into space or into a horn. An additional back woofer may radiate directly in the perpendicular direction.

Abstract: A singular configuration for a high fidelity sound speaker enclosure is disclosed. This acoustical structure is formed in two joined sections: the upper section which generally forms a four sided truncated pyramid and the lower section which generally forms an inverted four sided truncated pyramid. The complete structure, when viewed toward its frontal aspect, exhibits a generally hexagonal shape. The enclosure may house one or more speaker drivers and one of several methods of interior acoustic control may be utilized. The non-parallel walls and slanted front panel contribute to improved audio dynamics for electronic sound reproduction systems, and the overall design enhances contemporary decor aspects.

Abstract: High quality single or multiple channel sound dispersal is obtained through the arrangement of a plurality of similar speakers divergently mounted in an airtight frame with integral horns formed therein such that the central axis of each speaker is coaxial with a line normal to and projected from the center of each face of a polyhedron characterized by the tetrahedron, the hexahedron, the octahedron, the dodecahedron and the icosahedron. When the speakers thus arranged are excited in phase, a series of infinite acoustic baffles are created between adjacent speakers creating a series of exponential horns which disperse the sound energy as if from a point source to the walls, ceiling and floor of the listening room and then by reflection to the listener. The frame/horn component is manufactured of universal parts.

Abstract: A loudspeaker cabinet which has an open top and an open back which is defined by three in number of panels which are connected together. There is a front panel interposed between a pair of side panels with the side panels being angularly disposed relative to the front panel so that the rear edges of the side panels are located closer together than the front edges. Within the front panel there is mounted an array of loudspeakers. The vibrating diaphragm of each of the loudspeakers are located to be substantially in planar alignment with each other.

Abstract: An electroacoustic device comprises an array of electroacoustic transducer elements for producing a prescribed directional response pattern at a first frequency. Each element includes apparatus for restricting the frequency range of sound waves incident on said element so that the directional response pattern is invariant over a prescribed frequency band.

Abstract: The application describes a "jellyfish" acoustic array. The array is housed in a cable suspended container with an open bottom. A series of individual transducer elements are stacked inside the container, and may be deployed in a column hanging from the container. Spacer cables join adjacent transducer elements to limit the separation of the deployed elements. The uppermost of the transducer elements is suspended from the container. Control cables secured to the bottommost of the transducer elements and extend up through the container. Pulling in the control cables raises the bottommost transducer element and sequentially stacks the remaining transducer elements. Lowering the control cables serves to deploy the transducers.

Abstract: A multiple driver manifold for coupling four high frequency drivers to a single horn. Two drivers are mounted in a "Y" or "skewed" configuration, and two additional drivers are mounted so as to be directly opposed to one another along a line perpendicular to both the horn throat on-axis direction and the general plane of the "Y" configuration. Sound radiated transverse to the horn on-axis direction by the opposed drivers is "ray-reflected" by a unique ray-reflection summation plug located at the internal hub of the four acoustic paths.

Abstract: This speaker enclosure is of such design and structure, as to increase the input handling of speakers, enabling speakers rated at forty watts maximum handling, for example, to handle approximately eighty watts, which will facilitate the use of more of the sophisticated quality engineered into an excellent amplifier. Primarily, the enclosure employs a woofer, two mid-range speakers helped out by a ten inch horn, and two tweeters, and the speakers of the same frequency handling capacity, are wired in series. This arrangement covers the full audio frequency spectrum, and all of the speakers are crossed over by an adjustable cross-over.

Abstract: A loudspeaker enclosure is arranged to support an electromagnetic loudspeaker of the type having both front and back acoustic waves, with the front of the speaker registering with a front wave opening in the enclosure and the back of the speaker communicating through a transmission line cavity with a port the plane of which is disposed substantially normal to the plane of the front wave opening and which port is provided with a cross sectional area of about 0.5 to about 2.0 times the operative area of the driver cone of the loudspeaker, thereby giving a highly efficient means of sound propagation. The enclosure may also house high frequency "tweeter" speakers which provide only a front wave. Acoustic murals and other type reflectors and deflectors may be associated with one or more of the enclosures in an assembly within a room to give the illusion of sound emanating from many more sources than there are loudspeaker enclosures.

Abstract: A loudspeaker is provided for high-quality stereophonic loudspeaker systems intended to be positioned on the floor close to a vertical wall of a room. The aim is to reduce distortion due to that part of the reflected sound which arrives from substantially the same direction as the direct sound. Therefore the sound radiating surfaces and the loudspeaker casing are so arranged that the reflected sound from the floor and the wall arrives substantially in phase with the direct sound up to at least 800 Hz.The loudspeaker has a casing with a side wall (2), a top wall (4) and a bottom wall (6). A loudspeaker unit (7) in the side wall (2) is the sound source for at least the range from 50 to 150 Hz. A loudspeaker unit (9) mounted in a horn-type casing structure close to the bottom wall (6) is the sound source for at least the range from 300 to 800 Hz.

Abstract: A loudspeaker system has an elliptical stepped mid-range horn above and coplanar with a flared mid-bass horn having disposed therein a pair of tweeters on sidewalls thereof and a woofer in a backwall thereof. The back of the woofer communicates with a folded low frequency bass horn such that low frequency response is loaded from the rear of the diaphram for the woofer driver, thereby eliminating the necessity for further amplification and drivers to obtain fidelity in low frequency response. The low frequency bass section defines a convoluted path for the sound which comes from the interior structure of a folded horn thus creating an acoustical boost for low frequency sound.

Abstract: A loudspeaker system for use in stereo sound reproduction which is adapted to reflect all higher frequency sounds off a reflecting surface before the sounds reach a listener. The system comprises two enclosures, each having two compartments. The lower compartment houses the woofer; the upper compartment contains at least two arrays of at least two acoustic speakers, each array being positioned vertically relative to each other and projecting in the same general direction. The arrays are positioned in the enclosure such that the arrays project at a moderately divergent angle relative to each other and are spaced at least one array width from each other. The portion of the enclosure between the arrays is essentially pervious to sound and thus permits sound generated by the speakers which has been reflected from the reflecting surface to pass through the enclosure.

Abstract: A speaker assembly and its method of operation are described wherein a plurality of drivers are spatially adjustable relative to each other and to a selected critical listening point in order to establish maximum sound coherency for the system. Means for adjustment and calibration of the relative positions of the drivers are provided to facilitate their location upon a mounting sub-assembly, interchange of components within the total speaker assembly, and synchronization of the drivers for one or more desired listening positions within a listening environment. The speaker system preferably includes a low frequency range sub-assembly having one or more drivers supported in fixed relation within the total speaker system, a housing for the low frequency range sub-assembly including selective band-pass energy filtration means for isolating each driver from its enclosure and an internal structure providing increased structural rigidity and reducing non-linear turbulence within the enclosure.

Abstract: The direction-variable speaker system has first and second speaker cases containing speaker units for different reproduction bands, respectively, and an intermediate case interposed between those two speaker cases. The first speaker case and the intermediate case are connected by a first pivotal shaft pivotally of each other and are given tendency to pull each other. Between the first speaker system and the intermediate case is provided a rising angle setting mechanism including a first gear cam secured to one of these cases and a stopper member secured to the other for meshing engagement with the first gear cam. The second speaker case and the intermediate case are connected by second pivotal shaft pivotally of each other and are given tendency to pull each other.

Abstract: A loud-speaker of a closed or a bass-reflex type, wherein a plurality of speaker units are intensively arranged behind an opening of a baffle board or a throat of a sounding horn with the sound wave radiating direction thereof being concentrated toward the center axis of the opening of throat, and the total area of the entire diaphragms of the speaker units is made substantially equal to, or larger than, the area of the opening or throat.

Abstract: A loudspeaker system with a plurality of direct loudspeakers mounted on an enclosure front for radiating in a forward direction and at least one compensation loudspeaker for each loudspeaker. The compensation speakers are mounted to direct sounds rearwardly so that both the sound pressure as a result of the direct sounds and the sound pressure as a sum of the direct and indirect sounds are substantially independent of frequency.

Abstract: A loud-speaker of a closed or a bass-reflex type, wherein a plurality of speaker units are intensively arranged behind an opening of a baffle board or a throat of a sounding horn with the sound wave radiating direction thereof being concentrated toward the center axis of the opening of throat, and the total area of the entire diaphragms of the speaker units is made substantially equal to, or larger than, the area of the opening or throat.

Abstract: The loudspeaker system utilizes an ellipsoidal reflector of substantially the same diameter as the low frequency (LF) driver, positioned on-axis of the LF driver, as a reflective dispersing means for increasing the angular dispersion of acoustical energy, especially in the upper range of the LF driver. The ellipsoidal reflector is also utilized as a means to mount the higher frequency (HF) drivers in such a way that their axes diverge generally uniformly away from a point near the center of the ellipsoid so that the sound field of the higher frequency drivers is also well dispersed. The result is that the ellipsoid causes acoustical energy both from the LF driver and the HF drivers to appear to emanate from a point near the center of the ellipsoid, simulating the sound field generated by a single wide frequency range point source of sound.

Abstract: A speaker system includes a housing with four side panels and a back panel. A speaker mounting panel with a plurality of openings therethrough is positioned opposite the back panel to enclose the housing and define an acoustic chamber therein. A packed fibrous sheet material is attached to cover the interior surfaces of the side and back panels. A pair of unmatched drivers and a tweeter are mounted to the mounting panel so that each projects frontwave sound through one of the panel openings and backwave sound into the acoustic chamber. An open-ended cylindrical member defining an acoustic passageway is attached about the periphery of another mounting panel opening and extends part way into the acoustic chamber. An acoustic curtain extends between opposite side panels in a serpentine configuration about a portion of the periphery of the two drivers on one side of the curtain and the periphery of the cylindrical member on the other side of the curtain.

Abstract: A loud speaker system of simple, compact and economical design is provided, using a minimum of space and being suitable for exact corner placement. The loud speaker system provides spacious, room filling sound, and excellent stereo imagery. Its design concept uses the listening room walls to extend system frequency response, wide dispersion, and stereo imaging. The loud speaker system functions well over substantially the complete sound spectrum, despite the fact that its triangular-shaped enclosure is provided with only a single, relatively small, speaker on each of its vertically disposed panels.

Abstract: A loud speaker enclosure is disclosed in the preferred and illustrated embodiment. In this form, the upper end of the loud speaker enclosure is shaped in the form of an oval having a relatively narrow opening in one dimension which opening is relatively long in the other dimension. It is surrounded by an encircling shoulder which serves as a mounting plate. The housing flares downwardly and to a larger diameter matching that of a circle so that it can be connected to a speaker. Preferably, the circular end of the housing connects with the outer rim of a bass speaker. The shoulder at the oval end supports a tweeter. The shoulder is connected to the nether side of a package shelf, and the housing extends below the package shelf where greater room is obtained, enabling the larger woofer to be mounted with greater space for it.

Abstract: An improved loudspeaker housing including a closed chamber in the shape of a triangular right prism closed at both ends. All of the three walls of the prism and rectangular in shape and two of the walls are at right angles to each other. A circular opening in a first of the two walls adjacent the right angle is provided for a loudspeaker which is attached to the outside of the first wall with the sound output of the speaker directed against the third, or hypotenuse, wall of the prism. An opening is provided in the third wall which is in the shape of an exponentially widening gap. A box is placed over the outside of the first wall enclosing the loudspeaker, and is lined inside with sound absorbing material.

Abstract: A loudspeaker enclosure is shaped as a truncated pyramid with all vertical edges being smoothly rounded. A high-frequency speaker is mounted in an individual spherical shell and affixed to the top of the truncated pyramid. Other speakers are mounted inside the enclosure, and the portion of enclosure adjacent the speaker in a horizontal plane is kept to a minimum to reduce standing waves. An individual sound chamber is provided for each speaker mounted inside the enclosure. The speakers are also mounted with vibration isolation mounts which vibrationally decouple the speakers from the enclosure.

Abstract: A speaker enclosure with a multiplicity of sound-openings in which the back sound pressure from a plurality of front radiating speaker-units mounted in a vertical row on a baffle board, is completely divided at the back of the speaker-units by a centrally located dividing board. Reflecting boards at the corners of the sound paths and left and right sound pressure guide boards fixed to the edges of the baffle board effectively guide the back sound pressure through left and right front openings formed between the guide boards and the sides of the enclosure. The front openings are adjusted by hinged volume and tone control boards to effectively combine the sound pressure radiated from the front-side of the speaker-units with that from the back-side.

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.