Abstract: The invention relates to a loud speaker system, and more particularly, the utilization of space to the utmost of efficiency for the reproduction of sound. The single unit of a loud speaker apparatus is most effectively mounted at the 90.degree. intersection of adjacent walls and ceiling, cater-corner across the ceiling to another single unit. The single unit application is limited in that a square corner is necessary to transmit the horn properly throughout the listening chamber, yet by using multi-unit configurations with a plurality of the loud speaker apparatuses, the invention will also conform to two adjacent walls, or a flat surface, or to be suspended within the listening enclosure.

Abstract: A reflex type speaker enclosure integrally formed of ceramic material having a shell of hemispheroidal configuration and having an inturned speaker mounting flange adjacent the equatorial plane. The enclosure is adapted to be suspended by structure extending through an aperture in its apex. The flange forms a central, relatively large speaker aperture, and a plurality of circumferentially spaced, relatively small acoustic ports intermediate the shell and aperture. The radially inner edge of the flange is notched at the speaker aperture to permit placement of a speaker assembly into the interior of the hemispheroidal shell and allow insertion of suitable fasteners therethrough to secure the speaker assembly to the inwardly facing side of the flange portion.

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: A speaker enclosure for a stereophonic sound system is disclosed. The speaker is mounted in a chamber, the enclosure of which is connected to a tube of relatively long length and of circular cross-section. The construction is such that phase-inversion occurs so that the sound emanating from the rear of the speaker reinforces sound from the front of the speaker. The construction also substantially suppresses standing waves.

Abstract: A cabinet for improving the sound output of an amplifier including an upright housing having a horizontal partition dividing the interior of the housing into an upper portion and a lower portion, a speaker mounted in the horizontal partition and oriented for directing sound into the upper portion of the housing, a reflective sounding board positioned within the upper portion of the housing inclined at an angle relative to the horizontal partition, the sounding board being inclined from the lower back to the upper front of the housing dividing the upper portion into a forward and rearward resonance chamber, the sounding board reflecting sound outwardly from the cabinet, the sounding board having an opening therein of an area of one-half to seven-eighths of the vibrational area of the speaker, the opening being covered by a metal plate permitting fast sound transmission between the forward and rearward resonance chambers and a front panel covering the housing upper and lower portion, the upper portion of the fr

Abstract: An improved speaker enclosure for providing an acoustical balanced output with improved audio quality at low level reproduction. The enclosure includes a low sonic frequency pressure induced sonic wave amplification resulting from in phase reflection mechanically of re-induced resonant pressure waves. The invention comprises a speaker chamber of improved construction, the speaker being placed across one end, with the opposite end of the chamber being closed by an elastic diaphragm having an acoustic non-resonant tube centrally disposed protruding into the chamber, allowing the flow of air from inside the chamber enclosure to the outside atmosphere.

Abstract: In a bass-reflex sound reproducing system, a ducted port is utilized to reduce distortion in the lower portion of the frequency range. To increase relative sound pressure level in that lower portion, the enclosure is constructed to exhibit a predetermined acoustic compliance and is essentially air-tight except for a pair of primary openings. Mounted sealingly over one opening is the bass-range loudspeaker which exhibits a selected cone-suspension acoustic compliance, a given loaded free-air Q not less than 0.4, but not greater than 1.0 and a predetermined free-air resonant frequency. The ratio of the enclosure compliance to the cone compliance is no less than 0.707. The duct projects from around the periphery of the second opening and has its length and cross-sectional area such that it exhibits a tuned acoustic frequency the ratio of which to the speaker resonant frequency is not less than 0.5 and not greater than 1.0.

Abstract: The sound speaker system comprises an elongated vertical cylinder having an overall length equal to an integral multiple of its inside diameter. The cylinder is open at its upper and lower ends and a loudspeaker is positioned adjacent its lower end. The diameter of the loudspeaker cone is equal to one-half the inside diameter of the cylinder. The system is designed to be placed in the corner of a room so that sound emanating from the lower and upper ends is reflected by the floor and ceiling corners respectively into the room.

Abstract: A loudspeaker assembly comprising a loudspeaker including a front mounting flange having front surfaces, and an enclosure for the loudspeaker including a front wall and a rear wall and a top wall and a bottom wall and opposed side walls all having at least two layers of corrugated material, the inner layers of the walls being formed from a single inner member including a front panel having opposed top and bottom panels and opposed side panels hingedly connected thereto and rear panel sections respectively hingedly connected to the opposed panels, two of the rear panel sections cooperating to provide an inner rear panel and the other two of the rear panel sections cooperating to provide an outer rear panel; in one form, the loudspeaker is fixed to the inner member by having slots in opposed panels receiving the mounting flange therethrough with an adhesive between the front loudspeaker surfaces and the front panel; in the other form, the opposed top and bottom panels and the opposed side panels at the juncture