Flat speaker module and flat speaker arrangement

Abstract

Flat loudspeaker module (1) with a loudspeaker module housing (2) and at least one loudspeaker driver (7), wherein the at least one loudspeaker driver (7) has a loudspeaker chassis (8) with a front, outer peripheral edge, a membrane (12), and a magnetic driver (9) coupled to the membrane (12) for vibration excitation, wherein the membrane (12) is connected at its outer periphery to the front, outer peripheral edge of the loudspeaker chassis (8) and at the opposite inner periphery to a voice coil (11) of the magnetic driver (9), and wherein the magnetic driver (9) is arranged on the front side of the loudspeaker driver (7), forming the sound exit side, entirely or partially within the spatial area enclosed by the membrane (12), characterized in that the loudspeaker chassis (8) is arranged on the rear side of the loudspeaker, which is diametrically opposite the front, outer peripheral edge of the loudspeaker chassis (8) and the sound exit side,fastening means (13) which are designed to fasten the rear side of the loudspeaker chassis (8) to the loudspeaker module housing (2), and that the loudspeaker chassis (8) is connected at its rear side to a metal plate (14) by means of the fastening means (13), and the metal plate (14) is connected to the loudspeaker module housing (2) at opening edges on the rear side of the loudspeaker module housing (2).

Description

[0001] The invention relates to a flat loudspeaker module with a loudspeaker module housing and at least one loudspeaker driver, wherein the at least one loudspeaker driver has a loudspeaker chassis, a membrane and a magnetic driver coupled to the membrane for vibration excitation, which magnetic driver is arranged in front of the membrane on the loudspeaker front side forming the sound exit side.

[0002] The invention further relates to a flat loudspeaker arrangement with a frame in which at least one such flat loudspeaker module is accommodated.

[0003] There is a need for flat speaker modules that can be hung on the wall and ensure outstanding sound quality.

[0004] Flat speaker drivers are necessary for this.

[0005] DE 25 47 648 B2 discloses a front panel for the baffle of a loudspeaker cabinet, which is releasably glued and / or clamped to the loudspeaker cabinet. The front panel is provided with a circumferential groove around the baffle, into which angled edges of the front panel protrude.

[0006] DE 10 2004 006 724 A1 describes a playback device for sound and / or image signals with at least one loudspeaker and a flat, color-tunable light source which is not suitable for image reproduction.

[0007] CN 205545922 U discloses a loudspeaker comprising a cabinet frame, a diaphragm, and a loudspeaker voice coil connected to the diaphragm. A heat dissipation assembly is incorporated into the horn enclosed by the diaphragm.

[0008] Loudspeaker, In: Online library WIKIPEDIA, January 14, 2022, URL=https: / / de.wikipedia.org / w / index.php?title=Lautsprecher&oldid=219173830 shows the mechanical structure of loudspeakers with a loudspeaker chassis that has mounting holes on its outer peripheral edge, to which the membrane is attached and which forms the front of the loudspeaker.

[0009] DE 10 2019 123 255 A1 discloses an electrodynamic transducer with a rear frame having a cylindrical annular base closed by a first spider behind the diaphragm.

[0010] US 5 802 191 A describes a loudspeaker with a magnetic driver arranged in the horn of the membrane and screwed to the loudspeaker chassis with fixing screws.

[0011] US 8 693 723 B2, US 2002 / 0106101 A1, and DE 42 25 854 A1 describe loudspeakers in which a magnet system is located in the horn of the diaphragm. The magnet system is firmly screwed to the loudspeaker chassis with a central screw.

[0012] DE 41 26 121 A1 discloses a dynamic loudspeaker, in particular for use in motor vehicles, with a loudspeaker chassis carrying a conical membrane, in the centre of which is located a moving voice coil which engages in an air gap between magnetic poles of a permanent magnet arranged in the conical membrane on the side of the sound outlet.

[0013] DE 47089 A discloses a flat panel loudspeaker in which the magnetic driver is positioned in front of the concave side of the diaphragm, as far as possible within the diaphragm cavity. The diaphragm driver is positioned within the diaphragm cavity on the concave side.

[0014] WO 2010 / 142315 A1 describes a loudspeaker with a center surround, in which the voice coil surrounds only one magnet in the center. The central magnet system is surrounded by the diaphragm, which is coupled to and driven by the coil. The magnets protrude above and below the plane of the diaphragm.

[0015] Based on this, it is the object of the present invention to provide an improved flat loudspeaker module and an improved flat loudspeaker arrangement.

[0016] The object is achieved with the flat loudspeaker module having the features of claim 1 and with the flat loudspeaker arrangement having the features of claim 8. Advantageous embodiments are described in the subclaims.

[0017] For a generic flat loudspeaker module, it is proposed that the loudspeaker chassis has fastening means on the loudspeaker rear side, which is diametrically opposite the front, outer peripheral edge of the loudspeaker chassis and the sound outlet side, which are designed to fasten the loudspeaker rear side of the loudspeaker chassis to the loudspeaker module housing.

[0018] By attaching the loudspeaker driver to the rear of the loudspeaker cabinet, improved integration of the loudspeaker driver into the loudspeaker cabinet is achieved, reducing disturbing vibrations.

[0019] The loudspeaker chassis is connected to a metal plate using fasteners. The metal plate is connected to the loudspeaker cabinet at opening edges on the back of the loudspeaker cabinet. This makes it possible to further reduce the depth of the flat loudspeaker module and optimize the sound-optimized integration of the flat loudspeaker driver into the loudspeaker cabinet. For this purpose, the back of the loudspeaker driver protrudes into an opening in the rear wall of the loudspeaker cabinet. The metal plate connected to the loudspeaker driver covers this opening and is connected to the loudspeaker cabinet at the opening edges. The loudspeaker driver is thus indirectly connected to the loudspeaker cabinet, which is usually made of wood, via the metal plate. The thickness of the metal plate is usually less than the thickness of the rear wall of the loudspeaker cabinet.the thickness of the opening, so that the installation depth is reduced by the difference in material thickness compared to installing the speaker driver directly on the inside of the rear wall of the speaker cabinet.

[0020] This metal plate not only optimizes installation and maintenance, but also improves the acoustic coupling between the speaker driver and the speaker cabinet.

[0021] The fastening elements on the loudspeaker driver can, for example, have threaded openings each for receiving a fastening screw. This could be an internal thread for a machine screw or even just a simple hole for a positive connection using a sheet metal screw. However, the fastening elements can also be a simple hole, with the metal plate being positively connected to the metal plate using rivets. Other positive, force-fitting, or material-fit connections are also conceivable for the fastening elements to connect the loudspeaker driver directly or indirectly to the rear panel of the loudspeaker cabinet. This connection is preferably non-destructively removable and reattachable.

[0022] At least one of the speakers may have a central air duct extending from the rear of the speaker to the front of the speaker, which forms the sound output side, and through the magnetic driver. This allows for improved cooling of the speaker module without increasing the depth of the flat speaker module and compromising the acoustics.

[0023] A fan can be installed in such an air duct. This improves cooling through forced convection. The fan can also be used to regulate the airflow as needed.

[0024] At least one of the speakers can also be connected to the front of the speaker cabinet via its speaker chassis. For this purpose, the outer edge of the speaker chassis can be connected to the speaker cabinet in the usual way, for example, by screwing.

[0025] In this way, the loudspeaker driver can be integrated into the loudspeaker cabinet in an even more stable and vibration-free manner.

[0026] A coaxial driver can also be mounted on the magnetic driver, which has a horn open toward the sound exit side and forms a tweeter. This allows a tweeter to be integrated into the speaker driver in a space-saving manner. The resulting increased mass of the magnetic driver improves the sound characteristics of the woofer by reducing disruptive harmonics during the vibrational movement of the diaphragm and the magnetic driver.

[0027] The flat-panel speaker module can have at least one asymmetric tweeter. This arrangement of the flat-panel speaker module improves sound distribution for different listening levels and directions.

[0028] The flat-panel loudspeaker arrangement according to the invention has a frame in which at least one flat-panel loudspeaker module described above is accommodated. Furthermore, the frame is filled with absorber material in areas not occupied by flat-panel loudspeaker modules. By arranging absorber material between the loudspeaker drivers or between the loudspeaker modules, the flat-panel loudspeaker arrangement also dampens the room acoustics, thereby suppressing disturbing reflections from walls. The flat-panel loudspeaker arrangement thus combines active and, if necessary, passive loudspeakers with absorption panels.

[0029] The frame can be covered with a fabric on its front side, which forms the sound outlet side. The fabric can be custom-printed or printed. This allows the flat speaker arrangement to be individually adapted to the desired room design. This way, the flat speaker arrangement not only has an acoustic but also a visual impact, and can be used as a room-design element.

[0030] To secure the fabric, the frame can have a groove with clamping means on the front edges or rear sections, preferably on the side webs, for positive and / or force-fitting attachment of the fabric to the frame. The fabric stretched across the front of the frame is then pulled over the front edge of the frame and placed into the groove, where it is clamped in place with clamping means. This allows the fabric to be easily stretched onto the frame and replaced as needed.

[0031] The frame can have a lighting arrangement on at least one front edge or rear side edge sections. The lighting arrangement can, for example, be formed from an LED strip attached to the frame. The LED strip can, for example, be accommodated and secured in a groove in the frame. With the help of this lighting arrangement, the flat speaker arrangement can also be used as a light for illuminating a room as needed. The flat speaker arrangement emits indirect light.

[0032] For example, the lighting arrangement can have light sources for multiple colors to vary the light color. It is conceivable that the flat-panel speaker arrangement has a control unit that controls the lighting arrangement depending on the emitted sound. For example, the color can be controlled depending on the frequency spectrum. Similarly, the brightness of the emitted light can be controlled depending on the sound intensity, i.e., the volume.

[0033] It is also conceivable to control the light depending on the type of sound event, for example depending on the type of music: classical, pop, jazz, etc.

[0034] The invention is explained in more detail below using exemplary embodiments with the accompanying drawings. They show: Fig. 1 - Sectional view of a flat speaker module; Fig. 2 - Top view of a first embodiment of a flat loudspeaker arrangement; Fig. 3 - Top view of a second embodiment of a flat loudspeaker arrangement; Fig. 4 - Top view of a third embodiment of a flat loudspeaker arrangement; Fig. 5 - Sectional view of a flat speaker arrangement with cut-out views; Fig. 6 - Detail view b) of the flat speaker arrangement from Fig. 5; Fig. 7 - Detail view c) of the flat speaker arrangement from Fig. 5; Fig. 8 - Sectional view through a loudspeaker driver with additional coaxial driver; Fig. 9 - Side view of an embodiment of the flat speaker module from Fig. 1; Fig. 10 - Flat speaker arrangement made of Fig. 9 with additional fan.

[0035] Fig. 1 shows a side view of a flat loudspeaker module 1 with a module housing 2. The module housing 2 can have a front plate 3, a rear plate 4, and side walls 5 which connect the front plate 3 to the rear plate 4. Openings are provided in the front plate 3 and rear plate 4, with a loudspeaker driver 7 being received in each of a pair of aligned openings 6a, 6b.

[0036] The loudspeaker driver 7 has a loudspeaker chassis 8 that supports a magnetic driver 9. The magnetic driver 9 has, in a conventional manner, magnets 10 and a voice coil 11 guided in a slot of the magnets 10. The magnets 10 or magnet arrangement is preferably concentric, with the voice coil 11 immersed in an annular slot of the concentric magnet arrangement.

[0037] The voice coil 11 is connected to a diaphragm 12 to excite the diaphragm 12 to vibrate as it moves within the magnet assembly 10. The diaphragm 12 is connected at its outer peripheral edge to the front, outer peripheral edge of the chassis 8.

[0038] The magnetic driver 9 is located at the front of the loudspeaker driver 7, entirely or partially within the spatial area enclosed by the diaphragm 12. It can extend beyond the plane of the loudspeaker chassis 8, which is spanned at the front by its outer edge with the excitation of the diaphragm 12 to the loudspeaker chassis 8.

[0039] In the illustrated embodiment, the magnetic driver 9 projects beyond the upper, front plane of the loudspeaker chassis 8 to the front side of the loudspeaker driver 7, which forms the sound exit side, and utilizes the space or its depth provided by the front plate 3 of the module housing 2.

[0040] The front plate 3 can have an offset into the interior of the module housing 2 in the area of the opening 6a in order to increase the depth between the outer plane of the front plate 3 and the inner fastening plane for supporting the front, outer edge of the loudspeaker chassis 8.

[0041] The front opening 6a in the front plate 3 can be tapered (sloped) from the outside to the interior so as not to impede sound radiation. The shape and angle of the opening 6a can be adapted to the angle of the membrane 12 and continue the course of the membrane 12.

[0042] Fasteners 13 are provided on the rear of chassis 8. These may be threaded holes into which a fastening screw is screwed, as shown. A metal plate 14 is thus connected to the loudspeaker chassis 8 at the rear of chassis 8. The metal plate 14 rests against the opening edges of the rear opening 6b of the rear plate 4 of the module housing and is screwed there to the rear plate 4 with fastening screws 15.

[0043] The metal plate 14 may have an opening into which the chassis 8 is inserted, wherein the metal plate 14 is then connected to the fastening means 13 of the loudspeaker chassis 8 at the edges of the opening.

[0044] It is clear that the loudspeaker driver 7 is thus accommodated in a module housing 2 that is as flat as possible, utilizing the openings 6a, 6b on the front plate 3 and the rear plate 4 for installation. The loudspeaker driver 7 is coupled to the module housing 2 indirectly via the rear metal plate 14.

[0045] The speaker driver 7 can also be screwed to the front plate 3 on the front outer perimeter of the speaker chassis 8. This is optional and further reduces the risk of distortion.

[0046] Fig. Figure 2 shows a plan view of the front of a flat speaker assembly 16 with a frame 17 in which, for example, three flat speaker modules 1_L, 1_C, and 1_R for the left side, the center, and the right listening level are installed. It can be seen that each flat speaker module 1_L, 1_C, and 1_R has several speaker drivers 7 for the different frequency ranges, in particular bass, midrange, and treble.

[0047] The tweeters 18, which can be configured, for example, as coaxial drivers with a horn open toward the front, are aligned asymmetrically in the illustrated embodiment. While the horn in the center flat speaker module 1_C is symmetrical, the alignment of the horn for the left and right sides can be asymmetrical. It can be seen that on the right side, the horn is aligned asymmetrically to the left, and on the right side, the horn is aligned asymmetrically to the right.

[0048] In the illustrated embodiment, a bass speaker driver 19a, 19b is arranged at the lower and upper areas of each flat speaker module 1 for the lower and middle listening levels. Between them, two midrange speakers 20a, 20b are arranged one above the other, for example, in a line, ie, not offset laterally.

[0049] The tweeter 18, for example in the form of a coaxial driver, is then arranged between the two midrange speakers 20a, 20b.

[0050] An absorber plate 21 is arranged between the left flat speaker module 1_L and the middle flat speaker module 1_C, as well as between the middle flat speaker module 1_C and the right flat speaker module 1_R, or the space is filled with the absorber material 21. Likewise, the free space between the frame 17 above the respective flat speaker modules 1_L, 1_C, and 1_R to the upper crosspiece of the frame 17 is filled with absorber material 21, for example, with an absorber plate.

[0051] It is conceivable that the flat speaker modules 1_L, 1_C, and 1_R, as well as the absorber material 21, are attached to the frame 17 using fasteners, for example, by means of a form-fitting connection. For this purpose, the flat speaker modules 1_L, 1_C, and 1_R and the absorber material 21 can be clipped between the crossbars of the frame 17 and the center bars, for example.

[0052] Fig. Figure 3 shows a second embodiment of the flat panel loudspeaker arrangement 16. Here, an additional loudspeaker module 1_LO and 1_RO is included for the upper listening level on the right and left sides, respectively. These loudspeaker modules have only one bass loudspeaker 19c, one midrange speaker 20c, and one tweeter 18. This allows for an improved sound experience to be provided for the upper listening level as well.

[0053] Fig. 4 shows a third embodiment of a flat loudspeaker arrangement 16, in which, as in the second embodiment according to Fig. 3 On the left and right side, two loudspeaker modules 1_LU and 1_LO as well as 1_RU and 1_RO for the lower and upper listening levels are arranged one above the other.

[0054] The flat loudspeaker module 1_LU and 1_RU for the lower listening level is, like the upper flat loudspeaker module 1_LO, 1_RO, each equipped with a bass driver 19a and a midrange driver 20a as well as a tweeter 18 for only one listening level.

[0055] For example, the loudspeaker modules 1_LU and 1_LO or 1_RU and 1_RO can each be arranged mirror-symmetrically to each other, so that the bass speakers are arranged closer to each other than the tweeters 18.

[0056] It can be seen that absorber material 21, for example in the form of absorber plates, is arranged between the flat loudspeaker modules 1_LO, 1_LU, 1_RO and 1_RU.

[0057] Fig. 5 shows a sectional view through a flat loudspeaker arrangement 16 with a frame 17 that is L-shaped towards the rear. It can be seen that a flat loudspeaker module 1 is connected to each of the outer transverse webs 17, which, in this embodiment, is integrated with its module frame into the frame of the flat loudspeaker arrangement 16. The module frame thus consists at least partially of the frame 17 of the flat loudspeaker arrangement 16. However, it is also conceivable that the flat loudspeaker module 1, together with its frame, forms a completely independent, separate element, with the frame 2 being connected to the frame 17 of the flat loudspeaker arrangement 16.

[0058] It can also be seen that in this exemplary embodiment at least part of the bass loudspeakers 19 is formed as a passive loudspeaker by a non-actively deflectable membrane 22.

[0059] Adjacent to this is a loudspeaker driver 7, which is connected to the module frame 2 or the frame 17 of the flat speaker arrangement 16 by means of a metal plate on the rear. This is shown in Fig. 1 is presented and described in detail. Reference is made to this.

[0060] The loudspeaker chassis 8 of the loudspeaker driver 7 is connected to a coaxial driver designed as a tweeter 18, whose loudspeaker chassis 8 is in turn connected to the frame 17 of the flat loudspeaker arrangement 16 or optionally to the module frame 2 of the loudspeaker module.

[0061] The arrangement and fastening of the loudspeaker driver 7 can be seen more clearly in the cut-out view b), in particular the fastening on the right side with the loudspeaker chassis 8 of the coaxial driver (i.e. the tweeter 18).

[0062] The enlarged detail c) shows the edge area of the frame 17 of the flat loudspeaker arrangement 16. It can be seen that the end faces of the L-shaped edge area of the frame 17 taper towards the rear. This forms an inclined surface 23 around which a fabric covering (not shown) can be pulled from the front to the rear. Adjacent to the end face is a groove 24 which has clamping means 25 for the positive fastening of a fabric pulled over the front of the flat loudspeaker arrangement 16 for covering. The fabric can thus be laid over the front of the frame 17, stretched there and laid into the groove 24 via the inclined surface 23. The fabric is then clamped in the groove 24 with the clamping means 25. This ensures that the fabric is positively and releasably fastened and can thus be easily tensioned, installed and replaced.

[0063] A lighting arrangement 26 is also provided on the rear side of the frame 17, or rather, on the L-shaped milled frame strip. This can be inserted into a preferably circumferential groove 27 and can be designed as an LED light strip. The lighting arrangement 26 can preferably have multiple light sources for emitting different colors, thus providing lighting that is adapted to requirements not only in terms of brightness but also in terms of color impression.

[0064] It is conceivable that the flat-panel loudspeaker arrangement 16 has or is connected to control electronics that control the lighting arrangement 26 depending on the emitted sound. However, it is also conceivable that the lighting arrangement 26 is coupled to a room lighting control system in order to thus influence the illumination of the room in which the flat-panel loudspeaker arrangement 16 is installed, either wired or wirelessly.

[0065] Fig. 6 shows a detail view of a section through the loudspeaker driver 7 from Fig. 5 and the section shown there in b). Reference is also made to the illustration in Fig. 1.

[0066] It can be seen that the loudspeaker chassis 8 is connected at the rear to the metal plate 14 on the rear plate 4 of the module housing 2 or the frame 17 of the flat loudspeaker arrangement 16.

[0067] The loudspeaker driver 7 is also screwed to the loudspeaker chassis 8 from the inside at the front outer periphery of the loudspeaker chassis 8 to the front plate 3 of the module housing 2 or the frame 17 of the flat loudspeaker assembly 16. This can be done, for example, using wood screws that penetrate into the edge area of the front plate 3 adjacent to the front opening 6a.

[0068] Another fastening method instead of the wood screws 28, for example by means of machine screws and an associated nut, for example in the form of a drive-in sleeve or a screw connection from the front, is also conceivable.

[0069] The same applies to the fastening of the metal plate 14 to the rear plate 4, which can be done, for example, with machine screws or also with wood screws or similar.

[0070] Fig. 7 shows a detail view of the section of the L-shaped frame 17 according to the illustration c) in Fig. 5. This shows the groove 24 with the clamping element 25 for attaching the fabric (not shown) intended to cover the front of the flat speaker assembly 16. The clamping assembly 25 can have elastically deflectable fingers inserted into the groove, between which a rod is clamped. The rod is at least partially surrounded by the fabric, thus clamping the fabric between the rod and the clamping fingers.

[0071] Furthermore, the groove 27 with the lighting arrangement 26 incorporated therein can be seen. This can, for example, be implemented as LED light strips circumferentially inserted on the rear side of the frame 17. The lighting arrangement 26 radiates toward the rear wall, where the flat speaker arrangement 16 can be mounted. This emits indirect light, with the inclined surface 23 on the lateral end improving the radiation.

[0072] Fig. Figure 8 shows a cross-sectional view of a loudspeaker driver 7, which can be designed, for example, as a bass or midrange driver for the corresponding frequency range. It can be seen that the membrane 12 extends from the outer periphery at the front of the loudspeaker chassis 8 toward the center to the rear, where it is again connected to the loudspeaker chassis 8 by an elastic region 29.

[0073] On the sound radiation side, i.e., toward the front of the diaphragm 12, the magnetic driver 9 with its magnet is arranged in front of the diaphragm 12. The magnetic driver 9 is screwed to the loudspeaker chassis 8. The voice coil 11, which is coupled to the diaphragm 12, is inserted into the circumferential slot of the magnetic driver 9.

[0074] In the illustrated embodiment, an additional coaxial driver, forming a tweeter 18, is arranged in the center of the loudspeaker driver 7. The horn 30 of the coaxial driver is aligned with the diaphragm 12 toward the sound exit side, i.e., toward the front of the loudspeaker driver 7.

[0075] It can be seen that the coaxial driver (i.e., the tweeter 18) is connected to the speaker chassis 8 of the speaker driver 7. It can be designed as a separate element, i.e., as a separately functional speaker driver, and simultaneously carries the magnetic driver 9 for the speaker driver 7. This coaxial driver (i.e., the tweeter 18) thus provides, through the magnetic driver 9, a functional element for the speaker driver 7, to which the coaxial driver (i.e., the tweeter 18) is connected.

[0076] Fig. 9 shows a side sectional view of a flat loudspeaker module 1 as shown in Fig. 1. Therefore, reference can essentially be made to the description therein.

[0077] It can be seen that the loudspeaker driver 7 has an air duct 31 in its center. This allows an air flow L, indicated by arrows, to flow from the rear to the front side, which forms the sound outlet side, through which the loudspeaker driver 7 is cooled.

[0078] Fig. 10 shows a modified embodiment of the flat loudspeaker module 1, in which in addition to the air duct 31 in Fig.9, a fan 32 (ventilator) is also installed in the central air duct 31. This allows the air flow L to be additionally forced and controlled. For example, with the aid of a thermometer, the heating of the loudspeaker driver 7 can be measured and the fan 32 can be controlled depending on the loudspeaker driver temperature. The temperature can be measured directly at the loudspeaker driver 7 or indirectly in its surroundings. However, it is also conceivable to control the fan 32 depending on the power supplied to the loudspeaker driver 7 and / or depending on the operating time of the loudspeaker driver 7.

Claims

[1] Flat loudspeaker module (1) with a loudspeaker module housing (2) and at least one loudspeaker driver (7), wherein the at least one loudspeaker driver (7) has a loudspeaker chassis (8) with a front, outer peripheral edge, a membrane (12) and a magnetic driver (9) coupled to the membrane (12) for vibration excitation, wherein the membrane (12) is connected at its outer periphery to the front, outer peripheral edge of the loudspeaker chassis (8) and at the opposite inner periphery to a voice coil (11) of the magnetic driver (9), and wherein the magnetic driver (9) is arranged on the front side of the loudspeaker driver (7), forming the sound exit side, entirely or partially within the spatial area enclosed by the membrane (12), characterized bythat the loudspeaker chassis (8) has fastening means (13) on the loudspeaker rear side, which is diametrically opposite the front, outer peripheral edge of the loudspeaker chassis (8) and the sound outlet side, which are designed to fasten the loudspeaker rear side of the loudspeaker chassis (8) to the loudspeaker module housing (2), and that the loudspeaker chassis (8) is connected at its loudspeaker rear side to a metal plate (14) by means of the fastening means (13) and the metal plate (14) is connected to the loudspeaker module housing (2) at opening edges on the rear side of the loudspeaker module housing (2). [2] Flat loudspeaker module according to claim 1, characterized by that the fastening means (13) have threaded openings for receiving at least one fastening screw. [3] Flat loudspeaker module according to one of the preceding claims, characterized bythat at least one of the loudspeaker drivers (7) is connected with its loudspeaker chassis (8) to the front of the loudspeaker module housing (2). [4] Flat loudspeaker module according to one of the preceding claims, characterized by that at least one of the loudspeaker drivers (7) has a central air duct (31) extending from the rear of the loudspeaker to the front of the loudspeaker forming the sound outlet side, which extends through the magnetic driver (9). [5] Flat loudspeaker module according to claim 4, characterized by that a fan (32) is arranged in the air duct (31). [6] Flat loudspeaker module according to one of the preceding claims, characterized by that a coaxial driver is arranged on the magnetic driver (9), which has a horn (30) open towards the sound outlet side and forms a tweeter (18). [7] Flat loudspeaker module according to one of the preceding claims, characterized byat least one asymmetrical tweeter (18). [8] Flat loudspeaker arrangement (16) with a frame (17) in which at least one flat loudspeaker module (1) according to one of the preceding claims is accommodated and with absorber material (21) in areas not occupied by flat loudspeaker modules (1). [9] Flat loudspeaker arrangement according to claim 8, characterized by that the frame (17) is covered with a fabric on its front side forming the sound exit side, in particular with a user-specific printable or printed fabric. [10] Flat loudspeaker arrangement according to claim 9, characterized by that the frame (17) has a groove (24, 27) in the rear side area with clamping means (25) for clamping the fabric stretched over the front of the flat loudspeaker arrangement (16). [11] Flat loudspeaker arrangement according to one of claims 8 to 10, characterized bythat the frame (17) has a lighting arrangement (26), preferably an LED strip light arranged on a front edge or on a rear side area.

Images