301 results about "Woofer" patented technology

The utility model relates to a treble and bass coaxial moving coil loudspeaker horn, which comprises a main body bracket, a front cover, a PCB (Printed Circuit Board), an outer ring horn and an inner ring horn, the main body bracket comprises a shell and an annular partition plate arranged in the shell; a first magnetic circuit cavity is formed between the annular partition plate and the shell; and a second magnetic circuit cavity is formed in the annular partition plate. The main body support is divided into the first magnetic circuit cavity and the second magnetic circuit cavity by arranging the annular partition plate, the outer ring loudspeaker is arranged in the first magnetic circuit cavity, the inner ring loudspeaker is arranged in the second magnetic circuit cavity, namely, the inner ring loudspeaker is arranged in the spare area in the center of the outer ring loudspeaker, and therefore coaxial arrangement of the tweeter and the woofer is achieved. Not only can segmented coverage of an audio frequency band be realized, but also the whole loudspeaker structure can be more compact, and the overall appearance size of the loudspeaker is greatly reduced.

A coaxial speaker horn constitutes a coaxial speaker together with a tweeter and a woofer. The coaxial speaker horn includes a plurality of through holes arranged around an entire circumference of the horn.

The utility model belongs to the technical field of sofas, and particularly relates to a sound equipment surrounding sofa which comprises a sofa body, a sound equipment group, a woofer and a power amplifier, the sound equipment group is arranged in the sofa body, and the sofa body is arranged in a semi-surrounding structure; the sound equipment group comprises a plurality of full-frequency loudspeakers which are respectively arranged at two ends and the middle part of the sofa body; the woofer is arranged at the lower end in the sofa body; the power amplifier is arranged at the lower end of the interior of the sofa body, the sound set and the woofer are both connected with the power amplifier, and the power amplifier is connected with an external power supply, so that the sound set and the woofer are integrated in the sofa body, the requirement for an independent loudspeaker is eliminated, and precious indoor space is saved; the full-frequency horns are arranged at the two ends and the middle of the sofa body respectively, the surrounding sound effect is formed on the sofa body, the bass horns are closer to the bottom of the sofa body, bass can be reflected on the ground, and the bass effect is enhanced.

The utility model discloses a novel woofer assembly, which comprises a first cylinder arranged on the upper surface of a base, a first clamping plate sleeved on the first cylinder, a magnetic steel assembly sleeved on the first cylinder and a second clamping plate sleeved on the first cylinder, the first column body and the base are integrally formed, and a first through hole penetrating through the base and the first column body is formed in the base; the first clamping plate is attached to the upper surface of the base; the magnetic steel assembly is attached to the upper surface of the first clamping plate. The second clamping plate is attached to the upper surface of the magnetic steel assembly. According to the utility model, the technical problem of poor magnetic collection effect of the loudspeaker assembly is solved, and the technical effect of improving the magnetic collection effect of the loudspeaker assembly is achieved.

The utility model belongs to the technical field of sofas, and particularly relates to an interconnected immersive sofa which comprises a sofa body and an audio cable assembly, the sofa body is arranged in a semi-surrounded structure and comprises a plurality of sofa positions and a plurality of tea table positions, each tea table position is arranged between two adjacent sofa positions, and the audio cable assembly is arranged between the sofa positions and the tea table positions. Armrests are arranged at the outer sofa positions; or the tea table position is arranged on the outer side of the sofa position; a cavity is formed in each tea table position, and a sound set is arranged in each cavity; each sound box group comprises a power amplifier, a woofer and a plurality of full-frequency horns, the plurality of full-frequency horns and the woofer are connected with the power amplifier, and the power amplifier is connected with an external power supply; according to the utility model, the plurality of sound equipment groups are integrated in the sofa body, the plurality of sound equipment groups are interconnected through the audio cable assembly, and the sound effect surrounding effect is realized through different mounting positions of the tea table positions, so that a user can obtain immersive experience no matter the user sits in any sofa position.

A head-worn sound reproduction device is provided in the form of left and right earphones, which can either be clipped to each ear or mounted on other headgear. The earphones deliver high fidelity audio to a user's eardrums from near-ear range, in a lightweight form factor that is fully “non-blocking” (allows coupling in and natural hearing of ambient sound). Each earphone has a woofer component that produces bass frequencies, and a tweeter component that produces treble frequencies. The woofer outputs the bass frequencies from a position close to the ear canal, while the tweeter outputs treble frequencies from a position that is either close to the ear canal or further away. In certain embodiments, the tweeter is significantly further from the ear canal than the woofer, leading to a more expansive perceived “sound stage”, but still with a “pure” listening experience.

Embodiments of golf club heads comprising a club face with a variable thickness profile to increase face deflection and ball speed for a given CT are described herein. The variable thickness profile comprises a central region, the central transition, the hinge, the inner transition, and the hinge outer peak creating a variable face thickness with a topography that evokes the shape of a speaker woofer to produce non-linear bending, thereby producing greater strike face deflection and resulting ball speed for a given CT value. The variable face thickness profiles can further comprise a non-linear bending region comprising a first peak, a valley, and a second peak to non-linearly bend at other locations on the strike face thereby, producing greater strike face deflection and resulting ball speed for a given CT value.

Some embodiments of the utility model relate to a display technology. Especially to a display device. The display equipment comprises a rear shell and a bass sound box, the bass sound box comprises a box body, a bass loudspeaker and an outer cover, and a bass sound cavity is formed in the box body to install the bass loudspeaker; the first sound outlet through hole is formed in the rear shell, and the second sound outlet through hole is formed in the box body, so that a sound basin of the bass loudspeaker is exposed out of the outer side of the rear shell through the second sound outlet through hole and the first sound outlet through hole, a gap reserved between the box body and the rear shell is saved, and the installation occupied space of the bass loudspeaker box in the thickness direction is reduced; the outer cover is connected to the sound cone of the bass loudspeaker, so that the sound cone can be protected, and the outer cover vibrates under the driving of the sound cone to play a role in radiating sound waves.

The invention relates to a multifunctional loudspeaker box table lamp and belongs to the technical field of loudspeaker box table lamps. The table lamp and the loudspeaker box are combined into a whole, the occupied area of a table top is reduced, storage and management are convenient, the weight is basically concentrated in the main control base and the loudspeaker box at the low position, and stability is good; 360-degree rotation of the table lamp supporting rod relative to the loudspeaker box with the axis of the table lamp supporting rod as a rotating shaft is achieved through the rotating connecting base, 180-degree swing of the rotating connecting assembly with the hinge shaft of the hinge head as the axis is achieved through the hinge head, and 360-degree rotation of the table lamp holder with the axis of the rotating connecting assembly as a rotating shaft is achieved through the rotating connecting assembly. The requirement for all-direction illumination in daily illumination can be met, and adjustment is convenient and fast; the supporting disc ensures that sound waves of the bass loudspeaker can be smoothly spread downwards, meanwhile, the sound waves are guided, diffused and spread through the conical structure, vibration formed by multiple times of reflection of the sound waves between the structures is avoided, equipment vibration caused by potential energy of the sound waves is effectively reduced, equipment stability is ensured, and the sound effect is improved.

The invention provides a composite loudspeaker. The composite loudspeaker comprises a frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are respectively fixed on the frame; the magnetic circuit system drives the vibration system to vibrate and produce sound; the vibration system comprises a first bass unit and a treble unit which are arranged on a first surface of the magnetic circuit system and a second bass unit arranged on a second surface of the magnetic circuit system, the first bass unit and the treble unit are coaxially arranged, and the first bass unit is arranged around the outer side of the treble unit; the magnetic circuit system comprises central magnetic steel and side magnetic steel arranged on the periphery of the central magnetic steel; and the central magnetic steel and the side magnetic steel are magnetized reversely. According to the composite loudspeaker, double-sided sound production can be realized, the effective sound radiation area is increased, the frequency response is improved, the structural nonlinearity is reduced, the distortion is reduced, and the sound quality of the loudspeaker is improved; the vibration system comprises the bass sounding unit and the treble unit at the same time, so that the defect of high-frequency frequency response of the loudspeaker is overcome.

The utility model discloses a surround sound system of a near-field top surround loudspeaker. The surround sound system comprises a support main body; the number of the near-ear loudspeaker modules is two, and the near-ear loudspeaker modules are respectively connected with the two ends of the support main body; each group of near-ear loudspeaker module comprises a plurality of loudspeaker units; and the top loudspeaker module is connected with the support main body and is arranged at the top end of the support main body, and the sound output end of the top loudspeaker module faces the head. The top loudspeaker module is arranged on the front side of the bracket main body; the top loudspeaker module is a bass loudspeaker unit or a full-frequency loudspeaker unit and is used for receiving a bass sound channel signal. The number of the top loudspeaker modules is at least one, and the top loudspeaker modules are arranged on the front side and / or the rear side of the support body and used for receiving surround sound channel signals. Comprising a supporting plate, the supporting plate is at least connected with the front side of the top end of the support body, and the radian of the supporting plate is similar to that of the top of the head; the top loudspeaker module is connected with the support body through the supporting plate.

A multimedia device having a housing that includes a display screen, two tweeters, two mid-range drivers, and two woofers, which are integrated into the housing. Both woofers are disposed at a first distance from a center vertical axis of the housing in opposite horizontal directions, both tweeters are disposed at a second distance from the center vertical axis in the opposite horizontal directions, and both mid-range drivers are disposed at a third distance from the center vertical axis in opposite horizontal directions. In addition, both the first and second distances are greater than the third distance.

The utility model provides a double-ring waveguide horn sound box, which comprises a sound box shell, a bass assembly comprises a bass loudspeaker and a bass waveguide horn, the bass loudspeaker is arranged on the sound box shell in a penetrating manner, the bass waveguide horn is arranged on the bass loudspeaker and is positioned at one end of the bass loudspeaker, which is positioned outside the sound box shell, and the bass waveguide horn is positioned at the other end of the bass loudspeaker. The high-pitch assembly comprises a high-pitch loudspeaker and a high-pitch waveguide horn, the high-pitch loudspeaker is arranged on the sound box shell in a penetrating manner, the high-pitch waveguide horn is arranged on the high-pitch loudspeaker and located at one end, located outside the sound box shell, of the high-pitch loudspeaker, and the low-pitch waveguide horn and the high-pitch waveguide horn are arranged on the sound box shell in a staggered and superposed manner. According to the utility model, the bass waveguide horns and the treble waveguide horns are arranged on the sound box shell in a staggered and superposed manner, so that the up-down propagation direction of treble is compressed by bass, and the propagation direction of the treble is transversely diffused, thereby enabling the transverse diffusion of the treble to be wider, further increasing the listening position of the sound box, and improving the listening effect of the sound box. And the hearing feeling of the user is improved.

The utility model discloses an audio playing module and sound equipment, the module comprises a circuit board, a base and a double voice coil woofer arranged on the base, the base is provided with an avoidance port, the base is provided with a mounting rack at the avoidance port, the mounting rack is provided with a first tweeter and a second tweeter, the volume of the product can be effectively reduced, and the volume of the product is reduced. And a user can conveniently carry, use and install. The double-voice-coil woofer is provided with a first voice coil and a second voice coil, and the audio interface, the first voice coil, the second voice coil, the first tweeter and the second tweeter are all electrically connected with the circuit board. The circuit board is used for carrying out decoding, frequency division and amplification on an audio signal input by the audio interface and then respectively transmitting the audio signal to the first voice coil, the second voice coil, the first tweeter and the second tweeter, so that the first tweeter, the second tweeter and the double-voice-coil woofer play audios of different frequency bands, and the layering sense of the played sound effect is improved.

A new high-fidelity speaker includes a cabinet outer wall, a front partition and a side partition, the front partition and the side partition are arranged in the cabinet outer wall, the side edge of the front partition abuts against the side partition, the remaining edges of the front partition abut against the inner surface of the cabinet outer wall, the internal space surrounded by the cabinet outer wall is divided into a mid-high sound cavity, a bass cavity and a sound guide cavity, one side of the side partition is the sound guide cavity, and the opposite side is the mid-high sound cavity and the bass cavity, a high-pitched speaker port and at least one medium-pitched speaker are opened on the cabinet outer wall part corresponding to the mid-high sound cavity to install the speakers; a bass sound guide port is opened on the cabinet outer wall part corresponding to the sound guide cavity, the bass sound guide port is adjacent to the aforementioned at least two openings distributed on both sides of the side partition; the part of the side partition corresponding to the bass cavity is opened with a bass port to install a bass speaker towards the sound guide cavity, and the bass cavity forms a closed cavity. The speaker has good bass diving, sound image positioning, resolution and small space size.

The present disclosure relates to a woofer comprising: a housing in which a horn unit is arranged, in which the housing comprises a front surface for emitting sound, a back surface opposite to the front surface, first and second side surfaces connecting the front surface and the back surface, and a bottom surface and a top surface, in which the bottom surface has a first groove; the first connecting device is arranged at the first bottom corner position of the front face of the box body, and the second connecting device is arranged at the second bottom corner position of the front face of the box body; and the third connecting device is arranged in the first groove in the bottom surface of the box body. The utility model also relates to a loudspeaker array comprising the bass loudspeaker and the full-frequency loudspeaker, wherein the three connecting devices of the bass loudspeaker are directly connected with the corresponding connecting devices of the full-frequency loudspeaker.

A coaxial speaker includes a tweeter assembly, a woofer assembly, and a frame. The tweeter assembly is used to generate treble sound with a primary propagation direction along a first direction. The woofer assembly is used to generate bass sound with a primary propagation direction along the first direction. The woofer assembly includes a sound guide portion, which faces the tweeter assembly. The treble sound generated by the tweeter assembly, having a primary propagation direction along the first direction, is guided by the sound guide portion to propagate in a second direction. The tweeter assembly and woofer assembly are coaxially arranged, and the second direction is different from the first direction. The tweeter assembly and woofer assembly are mounted on the frame.

A coaxial speaker including a basket frame, a magnetic circuit system, a woofer vibration system, and a tweeter vibration system. The magnetic circuit system is provided with a cavity, a tweeter magnetic gap, and a woofer magnetic gap. The woofer vibration system includes a woofer diaphragm and a woofer voice coil. The tweeter vibration system includes a tweeter diaphragm and a tweeter voice coil. The woofer magnetic gap includes a first magnetic gap and a second magnetic gap, and the woofer voice coil includes a first voice coil and a second voice coil. The magnetic circuit system includes a magnetic yoke, a main magnetic portion, a first sub-magnetic portion, and a second sub-magnetic portion. The main magnetic portion includes a first magnet, a second magnet, a third magnet, and a main pole core. The main core includes a first plate portion, a second plate portion, and a wall portion.

The utility model discloses a sealing structure of a special-shaped sound cavity, which belongs to the technical field of sound boxes and comprises an upper shell assembly and a lower shell assembly, the upper shell assembly is positioned above the lower shell assembly, two ends of one side of the upper shell assembly are respectively provided with a woofer and a tweeter, and the lower end of the interior of the lower shell assembly is provided with a vibrating diaphragm. Fixing screws are arranged on the three sides of the lower end of the lower shell assembly, installation of the sealing structure can be completed through mutual splicing of the upper shell assembly and the lower shell assembly, positioning and pre-fixing can be carried out through matching of the protruding ribs and the grooves and matching of the male buckles and the female buckles, meanwhile, fixing is carried out through the fixing screws, a user can carry out assembling conveniently, and the sealing structure is convenient to use. And the dispensing glue is filled in the groove, so that the air tightness and the reliability are improved.

The invention discloses a sound box sound source directivity adjusting method and a sound box, and relates to the technical field of audio equipment. The sound box comprises a box body, a first sound production part (a mid-high pitch sound post), a second sound production part (a woofer) and a rotating shaft assembly, the second sound production part is arranged on the side face of the box body, and the first sound production part is connected with the box body through the rotating shaft assembly. According to the adjusting method, biaxial rotation of the first sound production part is achieved through the rotating shaft assembly, wherein in the first axial rotation state, 0-270-degree pitch angle rotation is conducted around the horizontal axis, and in the second axial rotation state, 0-360-degree yaw angle rotation is conducted around the vertical axis. In an initial state, the two sounding parts point to the same direction; during adjustment, a pitch angle or a yaw angle can be independently selected to be adjusted to a target angle, and a damping rotating shaft of the rotating shaft assembly is matched with the shaft sleeve to provide damping force, so that the adjusted angle is kept stable, and finally, the sound source directions of the two sound production parts meet the use requirements. The method and the sound box can flexibly adapt to different listening scenes, ensure that the sound field pointing is accurate and stable, and improve the tone quality experience.

1. The name of the design product: bass loudspeaker cone. 2. The use of the design product: parts for loudspeakers. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The invention discloses a portable sound box for a vehicle, and the sound box comprises a quick-release fixed seat which is installed and fixed in a passenger compartment of the vehicle, and the quick-release fixed seat is provided with a power supply connecting seat and a quick-release linkage assembly; the sound box shell is mounted on the quick-release fixing seat and is fixed through a quick-release linkage assembly, and meanwhile, an electric connecting part at the bottom of the sound box shell is in butt joint conduction with the power supply connecting seat; the inner core control box is installed in the sound box shell, a bass loudspeaker is installed at the top of the inner core control box, at least one alto loudspeaker is installed at one end of the inner core control box, a high pitch loudspeaker is installed at the position between the upper sides of the alto loudspeakers, a control circuit board is installed on the lower portion of the inner side of the inner core control box, and a loudspeaker is installed on the control circuit board. A battery box is installed on the lower side of the control circuit board, and side voice diaphragms are installed on the front side and the rear side of the inner core control box. The vehicle-mounted sound box can solve the problems that an existing vehicle-mounted sound box is inconvenient to disassemble and assemble, installation and fixation in a vehicle are not firm, and the sound box effect is poor.

A portable light speaker suitable for camping, comprising a base, a mounting column arranged on the base, a woofer arranged in the base, a top cover arranged on the upper end of the mounting column, a tweeter arranged in the top cover, and a lighting unit arranged in the mounting column; the top cover is provided with a handle, and a transparent cover is provided between the top cover and the base. The principle of the utility model: the kerosene lamp shape design is adopted, and the tweeter and the woofer are integrated together, so that the product has the functions of lighting and a speaker; the lighting unit is arranged in the middle position and emits light in 360 degrees, the tweeter is arranged at the top, and the woofer is arranged at the bottom, so that the lighting area is larger and the sound effect of the speaker is guaranteed.

The utility model discloses a novel linear array sound box, which comprises a paint-sprayed wooden box, a loudspeaker system formed by combining a woofer and a treble horn is arranged in the paint-sprayed wooden box, a front full-iron mesh enclosure is arranged at the front end of the paint-sprayed wooden box, side full-iron mesh enclosures are arranged on two sides of the paint-sprayed wooden box, and the front full-iron mesh enclosure and the side full-iron mesh enclosures are arranged in the paint-sprayed wooden box. The front full-iron mesh enclosure and the side full-iron mesh enclosure are made of high-strength metal materials, front hanging supports are arranged on the two sides of the front end of the paint spraying wooden box, rear angle supports are arranged on the two sides of the rear end of the paint spraying wooden box, and the front hanging supports and the rear angle supports have the multi-angle adjusting function. According to the novel linear array sound box, the design of the front hanging bracket and the rear angle bracket is improved, the fixing and angle adjusting capabilities of the sound box are enhanced, and the front part and the side surfaces of the sound box are comprehensively protected by adopting the full-iron mesh enclosure, so that the protection performance and the heat dissipation efficiency are improved, and the stability and the durability of the sound box in various application scenes are ensured.

The present invention discloses a vehicle-mounted woofer speaker device and a design method thereof. The vehicle-mounted woofer speaker device includes a box and a woofer speaker disposed in the box, the woofer speaker includes a paper cone, the paper cone has a front surface facing the interior of the vehicle and a rear surface opposite thereto, a cavity is formed between the rear surface of the paper cone and the box, a main waveguide for connecting the cavity to the outside is provided in the box, and a secondary waveguide is also provided in the box, the main waveguide and the secondary waveguide each have an inlet connected to the cavity, the main waveguide has an outlet for connecting to the outside of the vehicle, and the secondary waveguide has an outlet for connecting to the outside or inside of the vehicle. The woofer speaker device of the present invention has high sensitivity, more obvious low-frequency extension, and improved sound pressure level at low frequencies; the design method of the present invention can adjust and control more parameters and has a large degree of freedom.

A coaxial loudspeaker comprises a tweeter assembly, a woofer assembly, and a frame. The tweeter assembly is used to produce high-frequency sound with a primary propagation direction along a first direction. The woofer assembly is used to produce bass sound with a primary propagation direction along the first direction. The woofer assembly includes a sound guide facing the tweeter assembly. The high-frequency sound produced by the tweeter assembly, which has a primary propagation direction along the first direction, is guided by the sound guide to propagate in a second direction. The tweeter and woofer assemblies are arranged coaxially, and the second direction of propagation differs from the first. The tweeter and woofer assemblies are mounted on the frame.

The utility model discloses a sounding unit, which comprises two structural units, each structural unit comprises a basin stand, U iron, a central magnetic structure, an annular magnetic structure, a high-pitch vibration assembly, a support ring and a low-pitch vibration assembly, and the basin stand is provided with a notch; the enclosure wall of the U iron is connected with the basin frame and blocks the notch; the central magnetic structure is arranged on the U iron; the annular magnetic structure surrounds the central magnetic structure and is arranged on the U iron, a high-pitch magnetic gap is formed between the annular magnetic structure and the central magnetic structure, a low-pitch magnetic gap is formed between the enclosure wall of the U iron and the annular magnetic structure, and a through hole communicated with the high-pitch magnetic gap is formed in the U iron; the supporting ring is arranged on the annular magnetic structure; u irons of two structural units in the sounding unit are connected with each other, high-pitch magnetic gaps of the two structural units are communicated through a through hole, gaps of the two basin frames are correspondingly spliced to form an installation window, and a vibration motor is arranged in the installation window. The sound production unit has a vibration function and realizes high integration.

The utility model provides a sound box with a variable directional angle and a constant curvature, which relates to the technical field of loudspeakers and comprises a box body. A variable-direction constant-curvature acoustic horn for loading a loudspeaker unit, wherein the variable-direction constant-curvature acoustic horn for loading the loudspeaker unit is arranged at the upper part of the inner cavity of the box body; the woofer unit is arranged in the inner cavity of the box body; and the heat dissipation units are arranged on the two sides of the box body. The variable-direction constant-curvature acoustic horn loaded with the tweeter unit, the woofer unit and the like are arranged in the box body, so that wider sound field coverage is provided, the uniformity of sound transmission in a wide area is ensured, the standing wave reflection problem is reduced, the high-frequency response is smoother, and the sound quality fidelity is kept; through the rear hanging screws, the top and bottom hanging screws and the like on the box body, the installation angle of the sound box can be adjusted according to requirements, and different sound field requirements can be met.

The embodiment of the invention discloses a multi-loudspeaker array and a sound field partition control method of a vehicle cabin. The multi-loudspeaker array comprises a plurality of bass loudspeakers, a plurality of alto loudspeakers, a plurality of treble loudspeakers, a plurality of headrest loudspeakers, one or more mega bass loudspeakers and a plurality of surround loudspeakers. The bass loudspeaker, the alto loudspeaker and the treble loudspeaker are distributed in a plurality of areas of a vehicle cabin and are used for forming a sound field covering a full frequency band; the headrest loudspeaker is arranged at the position of a seat headrest and used for making sound to a corresponding seat in a near-field mode. The mega bass loudspeaker is arranged in the rear area of the vehicle cabin and used for supplementing low-frequency signals; the surround loudspeaker is arranged in the rear area of the vehicle cabin and used for forming a sound field surrounding the vehicle cabin. According to the embodiment of the invention, through the distributed layout and function division of the high-density multi-loudspeaker array, the sound fields of different seats are independently constructed and do not interfere with each other, a hardware basis is provided for partition control, and personalized audio requirements are met.

The invention is applicable to the technical field of audio playing equipment, and provides a sound box with a high pitch turbine structure, which comprises a box body, and a bass unit mounting position, a suspension rubber ring and a coaxial positioning ring are integrally formed on the front surface of the box body, the bass unit and the treble unit are coaxially embedded in the mounting position through the coaxial positioning ring and the suspension rubber ring; according to the sound box, through the design of the integrated structure and the involute vortex air channel on the front face of the box body and in cooperation with the nanometer damping layer and the elastic damping structure, high-frequency compression distortion and resonance distortion are greatly reduced, meanwhile, the high frequency is extended to 30 KHz or above through the 2.5 frequency division design, and more music details and overtones are restored; the coaxial positioning ring is used for guaranteeing the coaxiality of the bass unit and the hanging rubber ring, and the combined structure of the bottom phase guide tube and the central cone and the filtering grating assembly with the interval of 5mm-8mm are combined, so that ultralow-frequency 360-degree uniform diffusion and accurate filtering are realized, and the pain points of low-frequency turbidity and poor directivity of a traditional phase-inverted sound box are solved.