US3529691A - Twin equilateral sound speaker enclosure - Google Patents

Twin equilateral sound speaker enclosure Download PDF

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Publication number
US3529691A
US3529691A US828275A US3529691DA US3529691A US 3529691 A US3529691 A US 3529691A US 828275 A US828275 A US 828275A US 3529691D A US3529691D A US 3529691DA US 3529691 A US3529691 A US 3529691A
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Prior art keywords
enclosure
speaker enclosure
equilateral
twin
speaker
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Expired - Lifetime
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US828275A
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Fred A Wesemann
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FRED A WESEMANN
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FRED A WESEMANN
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2811—Enclosures comprising vibrating or resonating arrangements for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2869—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself
    • H04R1/2884—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure
    • H04R1/2888—Reduction of undesired resonances, i.e. standing waves within enclosure, or of undesired vibrations, i.e. of the enclosure itself by means of the enclosure structure, i.e. strengthening or shape of the enclosure for loudspeaker transducers

Definitions

  • High compliance speakers have free vertical action thus giving substantially distortion free sound reproduction.
  • the design of the present invention allo ws complete freedom of movement of the voice coil and cone so that a speaker enclosure, according to the present invention, having a one-half cubic foot volume enclosure reproduces sounds of a quality equal to enclosures of much larger size and of far greater expense.
  • a system formed by twin equillateral sound enclosures amplifies up to twice the input and provides a full twin 360 of rich, full and suspended sound.
  • the inventive speaker enclosure is light in weight and is compact, thus making it ideal for difficult installations such as in corners or relatively small and confined areas.
  • the enclosure is also designed so that it can serve as an attractive piece of furniture, such as a stool or table.
  • the inventive enclosure is extremely rugged and resistant to mildew and other deteriorating factors.
  • 'It is also an object of the present invention to provide a speaker enclosure 'which is substantially unaifected by environmental conditions and which may be readily decorated to suit any decor.
  • FIG. 1 is a vertical section through a speaker enclosure according to the present invention
  • FIG. 2 is a view similar to FIG. 1 showing an alternate embodiment of the present invention
  • FIG. 3 is a section taken along line 33 of FIG. 1;
  • FIG. 4 is a section taken along line 44 of FIG. 1.
  • FIG. 1 shows the speaker enclosure 10 which is comprised of an inner tube 11, an intermediate tube 12, and an outer tube 13.
  • the enclosure also comprises a bottom member 14 and a top member 15.
  • the bottom member 14 is formed in the general shape of a donut having an outer peripheral flange 16 and an Patented Sept. 22, 1970 inner peripheral flange 17, both of which are upwardly directed.
  • the outer and inner flanges engage with the outer surface of the outer tube 13 and the inner surface of the inner tube 11, respectively.
  • the intermediate tube engages in a circular groove 18 formed on the under side of the flat circular top member 15.
  • the bottom end of the intermediate tube 12 rests on a series of bloc-ks 19 which are spaced about the periphery thereof and serve to space the lower end of the intermediate tube from the bottom member 14.
  • top and bottom members are interconnected by rods 20 which have slotted flanges 21 on one end thereof countersunk in top member 15, and which are threaded on the other end to be secured to the bottom member by means of a washer and acorn nut 22 and 23-, respectively.
  • the rods 20 preferably pass through the blocks 19' to provide a solid backing for the washer and nut.
  • Legs 24 are secured to the bottom side of the bottom. member 14.
  • a speaker 25 is mounted within the inner tube 11 by bolts 27 and a flange member 26 secured to the inner surface of the inner tube. The speaker is directed upwardly in the enclosure.
  • the exterior of the outer tube 13 and topmember 15 may be finished with any suitable decorative material such as a laminated coating 28 and a decorative belting 29 and 30.
  • the top member could also be covered by a material suitable for the surface of a table or stool and, for the latter case, could also have a cushion secured thereto.
  • FIG. 2 shows an alternate arrangement of the present invention wherein a high frequency speaker 31 is mounted in the inner tube 11 pointed in a downward direction.
  • the speaker 31 is secured in position by means of brackets 32 secured to the inner tube by means of bolts 33.
  • FIG. 3 is a sectional view of the enclosure showing the positioning of a series of three spacer elements 34 to 36.
  • the spacer elements are in the form of wedges which are driven between the tubular members to assure the proper positioning thereof as well as serving to tend to suppress boominess thus giving a clean bass response to a low as forty cycles per second.
  • FIG. 4 is a further sectional view showing that the spacer elements extend the entire length of the enclosure. It should also be noted from this figure that the rods 19 and blocks 20 are uniformly spaced about the enclosure.
  • the path of the sound is generally upward through the inner tube, through a space between the top end thereof and the top member, downwardly between the inner and intermediate tubes, around the lower end of the intermediate tube and upward between the intermediate and outer tubes until it passes outward between the top end of the outer tube and the top member.
  • the present invention is particularly advantageous in that it can be sold as a finished product or in kit form with hundreds of sizes and styles of finish.
  • the cylindrical tubes are readily made from materials having a six inch to a thirty inch diameter, such as the tubular members used for concrete column construction called sleek tube (a tubular product of pressed paper or cardboard having a resin binder incorporated therein).
  • the tubes can be cut into desired lengths with the wedges driven between the three different diameter tubes to equally space them apart.
  • the speaker may then be simply mounted in the innermost tube and the top assembled by inserting the intermediate tube into a groove formed therein.
  • the top and bottom are then secured together with the rod members to form the finished product.
  • the top and bottom members may be formed of vacuum-formed, high impact styrene.
  • the bottom member can be formed as sort of a Mexican hat, then the top portion of the hat may be cut 01f and, since it is of suitable diameter, sliced into a smaller portion to form the flange memberfor mounting the speaker.
  • the blocks supporting the intermediate member on the bottom portion are preferably of wood and the material covering the outer surface may be any decorative material such as formica, leather, vinyls, or paint with any sort of decorative band such as brass or the like secured thereto.
  • a speaker enclosure having a wide frequency range comprising at least three concentrically mounted tubular members, the intermediate of said members being longitudinally displaced with respect to the other said tubular members, a bottom member secured to the inner and outer of said tubular members, a top member secured to the intermediate tube at the end thereof remote from said bottom member, means for spacing said tubular members uniformly, means between said bottom member and said intermediate tube to ensure said longitudinal displacement thereof, means interconnecting said top and bottom members, and a speaker mounted in said intermediate tube directed towards said top member.
  • said bottom member is donut-shaped with upwardly extending annular flanges on the inner and outer peripheries thereof, the inner'surface of said inner tube engaging with the inner side of said inner flange and the outer surface of said outer tube engaging with the inner side of said outer flange.
  • a speaker enclosure according to claim 1 further comprising a decorative material laminated to the outer surface of said outer tube and the top of said top member.

Description

Sept. 22, 1970 F. A. WESEMANN TWIN EQUILATERAL SOUND SPEAKER ENCLOSURE 2 Sheets-Sheet 1 Filed May 27, 1969 F'IG.1
INVENTOR FRED A. WESEMANN HARD suRFAcE EQUILATERAL SOUND SPEAKER ENCLOSURE TWIN Filed May 27, 1969 b SheetQs-Sheet 2 FIG 13 FIG 4 2O 20 l9 l9 ll 36 I INVENTOR FRED A. WESEMANN ATTORNEYS United States Patent 3,529,691 TWIN EQUILATERAL SOUND SPEAKER ENCLOSURE Fred A. Wesemann, 1801 S. Dixie Highway, 90 Holiday Village, Pompano Beach, Fla. 33060 Filed May 27, 1969, Ser. No. 828,275 Int. Cl. Gk 13/00 US. Cl. 181-31 7 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to a speaker enclosure for producing equilateral sound over a wide frequency range. The unique design of the inventive enclosure fully utilizes the output of a high compliance speaker.
High compliance speakers have free vertical action thus giving substantially distortion free sound reproduction. The design of the present invention allo ws complete freedom of movement of the voice coil and cone so that a speaker enclosure, according to the present invention, having a one-half cubic foot volume enclosure reproduces sounds of a quality equal to enclosures of much larger size and of far greater expense.
A system formed by twin equillateral sound enclosures amplifies up to twice the input and provides a full twin 360 of rich, full and suspended sound.
The inventive speaker enclosure is light in weight and is compact, thus making it ideal for difficult installations such as in corners or relatively small and confined areas. The enclosure is also designed so that it can serve as an attractive piece of furniture, such as a stool or table. The inventive enclosure is extremely rugged and resistant to mildew and other deteriorating factors.
It is therefore an object of the present invention to provide an improved speaker enclosure giving a full equilateral sound over a wide frequency range.
It is a further object of the present invention to produce a speaker enclosure Which may be readily and economically produced.
'It is also an object of the present invention to provide a speaker enclosure 'which is substantially unaifected by environmental conditions and which may be readily decorated to suit any decor.
The means for accomplishing the foregoing objects and other advantages, which will be apparent to those skilled in the art, are set forth in the following specification and claims and are illustrated in the accompanying drawings dealing with a basic embodiment of the present :invention. Reference is made now to the drawings in which:
FIG. 1 is a vertical section through a speaker enclosure according to the present invention;
FIG. 2 is a view similar to FIG. 1 showing an alternate embodiment of the present invention;
FIG. 3 is a section taken along line 33 of FIG. 1; and
FIG. 4 is a section taken along line 44 of FIG. 1.
Turning now to the drawings, FIG. 1 shows the speaker enclosure 10 which is comprised of an inner tube 11, an intermediate tube 12, and an outer tube 13. The enclosure also comprises a bottom member 14 and a top member 15. The bottom member 14 is formed in the general shape of a donut having an outer peripheral flange 16 and an Patented Sept. 22, 1970 inner peripheral flange 17, both of which are upwardly directed. The outer and inner flanges engage with the outer surface of the outer tube 13 and the inner surface of the inner tube 11, respectively. The intermediate tube engages in a circular groove 18 formed on the under side of the flat circular top member 15. The bottom end of the intermediate tube 12 rests on a series of bloc-ks 19 which are spaced about the periphery thereof and serve to space the lower end of the intermediate tube from the bottom member 14.
The top and bottom members are interconnected by rods 20 which have slotted flanges 21 on one end thereof countersunk in top member 15, and which are threaded on the other end to be secured to the bottom member by means of a washer and acorn nut 22 and 23-, respectively. The rods 20 preferably pass through the blocks 19' to provide a solid backing for the washer and nut. Legs 24 are secured to the bottom side of the bottom. member 14.
A speaker 25 is mounted within the inner tube 11 by bolts 27 and a flange member 26 secured to the inner surface of the inner tube. The speaker is directed upwardly in the enclosure.
The exterior of the outer tube 13 and topmember 15 may be finished with any suitable decorative material such as a laminated coating 28 and a decorative belting 29 and 30. The top member could also be covered by a material suitable for the surface of a table or stool and, for the latter case, could also have a cushion secured thereto.
FIG. 2 shows an alternate arrangement of the present invention wherein a high frequency speaker 31 is mounted in the inner tube 11 pointed in a downward direction. The speaker 31 is secured in position by means of brackets 32 secured to the inner tube by means of bolts 33.
Turning now to FIG. 3, this figure is a sectional view of the enclosure showing the positioning of a series of three spacer elements 34 to 36. The spacer elements are in the form of wedges which are driven between the tubular members to assure the proper positioning thereof as well as serving to tend to suppress boominess thus giving a clean bass response to a low as forty cycles per second.
FIG. 4 is a further sectional view showing that the spacer elements extend the entire length of the enclosure. It should also be noted from this figure that the rods 19 and blocks 20 are uniformly spaced about the enclosure.
Returning to FIG. 1, it will be noted that the path of the sound, as noted by the arrows, is generally upward through the inner tube, through a space between the top end thereof and the top member, downwardly between the inner and intermediate tubes, around the lower end of the intermediate tube and upward between the intermediate and outer tubes until it passes outward between the top end of the outer tube and the top member.
The present invention is particularly advantageous in that it can be sold as a finished product or in kit form with hundreds of sizes and styles of finish. The cylindrical tubes are readily made from materials having a six inch to a thirty inch diameter, such as the tubular members used for concrete column construction called sleek tube (a tubular product of pressed paper or cardboard having a resin binder incorporated therein). The tubes can be cut into desired lengths with the wedges driven between the three different diameter tubes to equally space them apart. The speaker may then be simply mounted in the innermost tube and the top assembled by inserting the intermediate tube into a groove formed therein. The top and bottom are then secured together with the rod members to form the finished product. The top and bottom members may be formed of vacuum-formed, high impact styrene. The bottom member can be formed as sort of a Mexican hat, then the top portion of the hat may be cut 01f and, since it is of suitable diameter, sliced into a smaller portion to form the flange memberfor mounting the speaker. The blocks supporting the intermediate member on the bottom portion are preferably of wood and the material covering the outer surface may be any decorative material such as formica, leather, vinyls, or paint with any sort of decorative band such as brass or the like secured thereto.
The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is therefore to be considered in all respects as illustrative and not restrie tive, the scope of the invention being indicated by the appended claims rather than the foregoing description, and all changes which come within the meaning and range of equivalency of claims are therefore to be embraced therein.
What is claimed is:
1. A speaker enclosure having a wide frequency range comprising at least three concentrically mounted tubular members, the intermediate of said members being longitudinally displaced with respect to the other said tubular members, a bottom member secured to the inner and outer of said tubular members, a top member secured to the intermediate tube at the end thereof remote from said bottom member, means for spacing said tubular members uniformly, means between said bottom member and said intermediate tube to ensure said longitudinal displacement thereof, means interconnecting said top and bottom members, and a speaker mounted in said intermediate tube directed towards said top member.
said bottom member is donut-shaped with upwardly extending annular flanges on the inner and outer peripheries thereof, the inner'surface of said inner tube engaging with the inner side of said inner flange and the outer surface of said outer tube engaging with the inner side of said outer flange.
6. A speaker enclosure according to claim 1, wherein said top member includes a groove therein, said intermediate tube being engaged in said groove.
7. A speaker enclosure according to claim 1 further comprising a decorative material laminated to the outer surface of said outer tube and the top of said top member.
References Cited UNITED STATES PATENTS 2,217,279 10/1940 Karns 181-31 3,327,808 6/1967 Shaper 181-31 STEPHEN I. TOMSKY, Primary Examiner
US828275A 1969-05-27 1969-05-27 Twin equilateral sound speaker enclosure Expired - Lifetime US3529691A (en)

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51127734U (en) * 1975-04-10 1976-10-15
US4164988A (en) * 1976-08-25 1979-08-21 Admiral Corporation Fine tuned, column speaker system
US4168761A (en) * 1976-09-03 1979-09-25 George Pappanikolaou Symmetrical air friction enclosure for speakers
US4196792A (en) * 1978-11-09 1980-04-08 Grieves J Philip Laminar flow vented speaker enclosure
EP0040281A1 (en) * 1980-05-20 1981-11-25 Lady Bea Enterprises, Inc. Loudspeaker and enclosure system with digital encoding phase shifted crossover network and self contained digital power drive system, and a modular method of utilizing moulded inserts
US4593784A (en) * 1984-05-03 1986-06-10 C. Harold Weston, Jr. Loudspeaker enclosure
US4628528A (en) * 1982-09-29 1986-12-09 Bose Corporation Pressure wave transducing
US4942939A (en) * 1989-05-18 1990-07-24 Harrison Stanley N Speaker system with folded audio transmission passage
FR2664782A1 (en) * 1990-07-11 1992-01-17 Legouic Gilles Omnidirectional acoustic enclosure
US5189706A (en) * 1989-01-23 1993-02-23 Yamaha Corporation Acoustic apparatus
USD346878S (en) * 1991-03-25 1994-05-10 Philip Morris Incorporated Electrical cigarette
WO2001089295A3 (en) * 2000-05-19 2002-04-25 J Roy Nelson Blood-sucking insect control station
US6704425B1 (en) * 1999-11-19 2004-03-09 Virtual Bass Technologies, Llc System and method to enhance reproduction of sub-bass frequencies
US6769509B2 (en) 2002-12-19 2004-08-03 Ronald Paul Harwood Pole speaker
US20050087392A1 (en) * 2003-09-12 2005-04-28 Flanders Andrew E. Loudspeaker enclosure
US20050285011A1 (en) * 2004-06-23 2005-12-29 Harwood Ronald P Support base for a structural pole
US20070269074A1 (en) * 2006-05-16 2007-11-22 Mitek Corp., Inc. Omni-Directional Speaker Lamp
US20080317273A1 (en) * 2006-06-28 2008-12-25 Bouvier Peter M Folded coaxial transmission line loudspeaker
US8064627B2 (en) 2007-10-22 2011-11-22 David Maeshiba Acoustic system
US20130327585A1 (en) * 2012-06-07 2013-12-12 Jda Technology Llc Ported audio speaker enclosures
US20140190481A1 (en) * 2013-01-04 2014-07-10 Mohammad R. Jam Acoustic Ventilation and Respiratory Booster Machine
WO2014194076A1 (en) * 2013-05-31 2014-12-04 Wilson David A Speaker enclosure frame
EP3477629A1 (en) * 2017-10-30 2019-05-01 Alpine Electronics, Inc. Vehicle loudspeaker system and vehicle structure comprising such loudspeaker system
USD884683S1 (en) * 2019-01-02 2020-05-19 Alpine Electronics, Inc. Speaker driver frame
US10694280B1 (en) * 2019-01-10 2020-06-23 MS Electronics LLC Hanging speaker system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2217279A (en) * 1938-07-23 1940-10-08 Rca Corp Acoustic apparatus
US3327808A (en) * 1965-06-10 1967-06-27 Dyna Empire Inc Loud speaker housing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2217279A (en) * 1938-07-23 1940-10-08 Rca Corp Acoustic apparatus
US3327808A (en) * 1965-06-10 1967-06-27 Dyna Empire Inc Loud speaker housing

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5616872Y2 (en) * 1975-04-10 1981-04-20
JPS51127734U (en) * 1975-04-10 1976-10-15
US4164988A (en) * 1976-08-25 1979-08-21 Admiral Corporation Fine tuned, column speaker system
US4168761A (en) * 1976-09-03 1979-09-25 George Pappanikolaou Symmetrical air friction enclosure for speakers
US4196792A (en) * 1978-11-09 1980-04-08 Grieves J Philip Laminar flow vented speaker enclosure
EP0040281A1 (en) * 1980-05-20 1981-11-25 Lady Bea Enterprises, Inc. Loudspeaker and enclosure system with digital encoding phase shifted crossover network and self contained digital power drive system, and a modular method of utilizing moulded inserts
US4628528A (en) * 1982-09-29 1986-12-09 Bose Corporation Pressure wave transducing
US4593784A (en) * 1984-05-03 1986-06-10 C. Harold Weston, Jr. Loudspeaker enclosure
US5189706A (en) * 1989-01-23 1993-02-23 Yamaha Corporation Acoustic apparatus
US4942939A (en) * 1989-05-18 1990-07-24 Harrison Stanley N Speaker system with folded audio transmission passage
FR2664782A1 (en) * 1990-07-11 1992-01-17 Legouic Gilles Omnidirectional acoustic enclosure
USD346878S (en) * 1991-03-25 1994-05-10 Philip Morris Incorporated Electrical cigarette
US6704425B1 (en) * 1999-11-19 2004-03-09 Virtual Bass Technologies, Llc System and method to enhance reproduction of sub-bass frequencies
US20040218774A1 (en) * 1999-11-19 2004-11-04 Virtual Bass Technologies, Inc. System and method to enhance reproduction of sub-bass frequencies
WO2001089295A3 (en) * 2000-05-19 2002-04-25 J Roy Nelson Blood-sucking insect control station
US6467215B1 (en) 2000-05-19 2002-10-22 Bugjammer, Inc. Blood-sucking insect barrier system and method
US6568123B2 (en) * 2000-05-19 2003-05-27 Bugjammer, Inc. Blood-sucking insect control station
USRE40646E1 (en) 2000-05-19 2009-03-10 Bugjammer, Inc. Blood-sucking insect control station
US6769509B2 (en) 2002-12-19 2004-08-03 Ronald Paul Harwood Pole speaker
US20050087392A1 (en) * 2003-09-12 2005-04-28 Flanders Andrew E. Loudspeaker enclosure
US7219873B2 (en) * 2004-06-23 2007-05-22 Ronald Paul Harwood Support base for a structural pole
US20050285011A1 (en) * 2004-06-23 2005-12-29 Harwood Ronald P Support base for a structural pole
US20070269074A1 (en) * 2006-05-16 2007-11-22 Mitek Corp., Inc. Omni-Directional Speaker Lamp
US20080317273A1 (en) * 2006-06-28 2008-12-25 Bouvier Peter M Folded coaxial transmission line loudspeaker
US7925036B2 (en) * 2006-06-28 2011-04-12 Bouvier Peter M Folded coaxial transmission line loudspeaker
US20110158447A1 (en) * 2006-06-28 2011-06-30 Bouvier Peter M Folded coaxial transmission line loudspeaker
US8064627B2 (en) 2007-10-22 2011-11-22 David Maeshiba Acoustic system
US20120061174A1 (en) * 2007-10-22 2012-03-15 David Maeshiba Acoustic system
US20130327585A1 (en) * 2012-06-07 2013-12-12 Jda Technology Llc Ported audio speaker enclosures
US8925676B2 (en) * 2012-06-07 2015-01-06 Jda Technology Llc Ported audio speaker enclosures
US20140190481A1 (en) * 2013-01-04 2014-07-10 Mohammad R. Jam Acoustic Ventilation and Respiratory Booster Machine
WO2014194076A1 (en) * 2013-05-31 2014-12-04 Wilson David A Speaker enclosure frame
US8985268B2 (en) 2013-05-31 2015-03-24 David A. Wilson Speaker enclosure frame
US20150156574A1 (en) * 2013-05-31 2015-06-04 David A. Wilson Speaker enclosure frame
EP3477629A1 (en) * 2017-10-30 2019-05-01 Alpine Electronics, Inc. Vehicle loudspeaker system and vehicle structure comprising such loudspeaker system
USD884683S1 (en) * 2019-01-02 2020-05-19 Alpine Electronics, Inc. Speaker driver frame
US10694280B1 (en) * 2019-01-10 2020-06-23 MS Electronics LLC Hanging speaker system
US20200280797A1 (en) * 2019-01-10 2020-09-03 MS Electronics LLC Hanging speaker system
US10972831B2 (en) * 2019-01-10 2021-04-06 MS Electronics LLC Hanging speaker system

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