Matches 101 - 149 out of 149 < 1 2 3
Match Document Document Title
4503553 Loudspeaker system  
The disclosure relates to an audio signal reproduction system having one or more of the following features: (1) a loudspeaker having (a) a flat frequency response and (b) a predetermined power...
4475226 Stereo sound and light track system  
A stereo sound and light track system includes one or more sound fixtures and one or more light fixtures, each fixture being independently mounted for movement on a track to any mounted position...
4451711 Readily portable speaker enclosure  
A readily portable speaker enclosure having sides, a back and a top and bottom releasably held together by a clamping assembling wherein reinforcing fastening strips secured to the walls are held...
4418243 Acoustic projection stereophonic system  
An acoustic projection system in which a reproducer array disposed in a listening chamber and operating in conjunction with a signal processor coupled to right and left channels carrying...
4388492 Miniature stereo device with extensible speakers  
A miniature stereo device which provides a satisfactory stereo effect includes a main body having an audio device which generates a stereo output, and a pair of speakers positioned at both sides of...
RE31228 Loudspeaker system  
A loudspeaker system includes a 10-inch high compliance woofer in a 1.5 cubic foot substantially fluid-tight enclosure. A pair of smaller speakers functioning as upper frequency radiators are...
4330691 Integral ceiling tile-loudspeaker system  
A loudspeaker is formed integrally with a rectangular ceiling tile which is provided with electrical contacts for connecting the loudspeaker in series or parallel combinations with other...
4326099 Low frequency cabinet, in particular for a triphonic audio network  
The present invention covers a low frequency acoustic cabinet. The cabinet contains two enclosures holding at least one low frequency loud-speaker so that the front face of each loud-speaker...
4296280 Wall mounted speaker system  
A high-fidelity speaker arrangement suitable for mounting in the wall structure of a wall is disclosed. A bass reflex speaker enclosure containing a plurality of speakers and an associated...
4276446 Acoustic transducer system  
At least one active and one inactive speaker element or radiator are mounted in each of a plurality of differently sized speaker housings, each of which housings has a fundamental resonant...
4267405 Stereo speaker system for creating stereo images  
A stereo speaker system adapted for home use is arranged to increase stereo image perception by reducing spurious and confusing sound images. The speaker system includes a pair of low frequency...
4266092 Loudspeaker system with broad image source  
A loudspeaker system comprises a woofer in a front panel, a midrange driver facing to the front and a tweeter in a corner panel separated from the midrange driver by the woofer and pointing to the...
4256922 Stereophonic effect speaker arrangement  
A device for reproducing acoustic events carried on at least two channels, in a room with at least two sidewalls, comprising, at least one first sound-radiating transducer positioned to radiate...
4249037 Pyramid loudspeakers with twin cross-phased mid-range speakers  
A truncated, open top, pyramid housing is provided containing a downwardly propagating woofer mounted near the base of the pyramid; a forwardly and slightly upwardly propagating tweeter mounted on...
4227050 Virtual sound source system  
A virtual sound source system comprises a pair of speaker cabinets of unique design positioned along the front wall of a listening room. The speaker cabinets together with the front wall, sidewalls...
4224467 Corner mounted sound reproduction speaker apparatus  
A corner mounted sound reproduction speaker apparatus is adapted to be mounted in a corner space defined in part by a pair of intersecting vertical surfaces and includes a hollow enclosure housing...
4218583 Varying loudspeaker spatial characteristics  
A loudspeaker system having two angled rear panels with four drivers on each rear panel and a single driver on the front panel has the drivers connected in series between first and second terminals...
4181819 Unitary panel multiple frequency range speaker system  
A speaker enclosure is provided with an elongated vertically oriented flat panel having a plurality of vertically spaced speaker openings and a sound port positioned near the upper end of the...
4176253 Current loaded pneumatically driven loudspeaker arrangements  
Electro-acoustic transducer arrangement are disclosed in which the tendency to diaphragm distortion between the drive and suspension positions is reduced and the efficiency as well as linear...
4154979 Woofer efficiency  
A louspeaker system having a woofer, tweeter and crossover network has a closed box resonance of 81.5 Hz which frequency is above the half-power point of 65 Hz of the system that includes active...
4139734 Pivoted loudspeaker enclosure with visual indicator of optimum listening position  
The present invention provides a loudspeaker comprising a plurality of enclosures each provided with a loudspeaker drive unit connected to an input, at least one of the enclosures being pivotally...
4138594 Small dimension low frequency folded exponential horn loudspeaker with unitary sound path and loudspeaker system including same  
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...
4132861 Headset having double-coil earphone  
A headset for use in a voice communication system which provides a common audio signal, such as a radio receiver signal, to a plurality of such headsets. The headset includes an earphone having a...
4128738 Compact transmission line loudspeaker system  
A compact loudspeaker system adapted for the reproduction of sound at minimum distortion. Two small diameter direct radiator loudspeakers and a matching crossover network are mounted in a common...
4122302 Two way dynamic and electrostatic speaker enclosure with side vent for greater high frequency dispersion  
An electroacoustic transducer, especially an electrostatic speaker embodying a conductive perforated backing plate, a dielectric membrane carrying a conductive coating, and an intervening spacing...
4100371 Loudspeaker system with phase difference compensation  
A loudspeaker system in which two loudspeakers that cover different but overlapping frequency ranges, for example a treble range and a bass range, are mounted to radiate from co-planar mouths....
4058675 Loudspeaker system for use in a stereophonic sound reproduction system  
In order to improve characteristics of localization of sound images and a listener's sense of stereophonic perspective, a loudspeaker system for a stereophonic sound reproduction system comprises a...
4054750 Full range rotatable speaker housing with oppositely directed speakers  
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...
4051919 High fidelity speaker enclosure  
A high fidelity speaker array comprises a full range speaker board, a pair of tweeter boards disposed at an angle of from 120° to 165° with respect to said full range speaker board, and a pair of...
4037051 Flat baffle speaker system having improved crossover  
Method and apparatus for balancing frequency crossover of an audio speaker system is disclosed by which a system woofer circuit is provided with inductance proportional to the product of woofer...
3967065 Plexiglas speakers  
A novel speaker unit for incorporating into a high fidelity and sound system, the speaker unit consisting of a cabinet made of plexiglas, the plexiglas cabinet enclosing tweeter, midrange and...
3947635 Integrated stereo speaker system  
An integrated stereo speaker system in which substantially non-directional bass sounds of low frequency are supplied exclusively to an enclosure common to right and left channels. Directional...
3909531 Acoustic transducer system  
Equal-sized speaker cones are housed in equal-sized closed compartments in a system of loudspeakers, a housing therefor and electrical crossover circuits which system results in substantially equal...
3892624 Stereophonic sound reproducing system  
A stereophonic sound reproducing system having left and right audio transducer means arranged relatively close to each other, and a combiner means connected to a stereophonic sound signal source...
3824343 MULTIPLE DRIVER DYNAMIC LOUD SPEAKER  
A loud speaker assembly capable of producing coherent sound with multiple driver, dynamic loud speakers is provided, which assembly is characterized by sonic frequencies of the mid-range and treble...
3778551 AIR COOLED AUDIO AMPLIFIER ASSEMBLY  
An audio amplifier assembly employs transistors which are subject to substantial heating, and which are mounted on heat sinks situated on the cabinet of the device, there being air passages leading...
3778562 ELECTROSTATIC LOUDSPEAKER HAVING ACOUSTIC WAVEFRONT MODIFYING DEVICE  
An Acoustic Wavefront Modifying Device can be used with acoustic waves having audio frequencies within the range of human hearing as a lens or prism. The device comprises an enclosure having at...
3773976 ELECTROSTATIC LOUDSPEAKER AND AMPLIFIER  
An electrostatic loud speaker system is shown which combines a balanced transducer, an amplifier and an enclosure each of unique construction which together permit the reproduction of frequencies...
3637938 STEREO SPEAKER ARRANGEMENT AND CIRCUIT  
A sum speaker is placed behind a panelboard opening in an enclosure. Across the front of the opening and normal to the panel is divider means having speaker apertures therethrough. A baffle member...
3627948 STEREO LOUDSPEAKER SYSTEM  
A stereo loudspeaker system with right-hand and left-hand loudspeaker sections each having forwardly and rearwardly directed loudspeaker means fed with middle and high-frequency signals of the...
3525809 ELECTRONIC ORGAN SOUND REPRODUCTION APPARATUS  
3400217 Method of and means for loudspeaker sound wave distribution  
3165587 Multiple-loudspeaker system  
3155774 Loudspeaker arrangement  
3138667 Loudspeaker system  
3065816 Stereophonic sound distributor  
2921135 Electroacoustical device  
2831060 Method of reproducing speech and music by means of loudspeakers  
3588355 Title is not available  
Matches 101 - 149 out of 149 < 1 2 3