A speaker includes a vibration system and a magnetic circuit system driving the vibration system to vibrate and sound. The vibration system includes a voice membrane and a voice coil driving the voice membrane to vibrate. The voice membrane includes a diaphragm and a dome fixed with the diaphragm, the dome includes a main body and a positioning portion bending and extending from an edge of the main body, the positioning portion is used for ensure concentricity of the diaphragm when the diaphragm is integrally formed with the dome. Compared with the related art, the speaker disclosed by the present disclosure could improve the reliability.

A bass loudspeaker system including: a housing; a first and second diaphragm; a first and second drive unit, each drive unit including a stationary part and a translatable part. The translatable part of the first drive unit is attached to the first diaphragm to form a first moving assembly suspended by a first surround and a first damper, and the translatable part of the second drive unit is attached to the second diaphragm to form a second moving assembly suspended by a second surround and a second damper. The system energises the drive units to cause the first and second moving assemblies to move along a movement axis in opposite directions to produce sound. The first surround includes an outside tab, an inside tab, and a surround body between the outside and inside tabs. The second surround includes an outside tab, an inside tab, and a surround body between the outside tab and the inside tab. The first damper-includes an outside tab attached to the housing, an inside tab attached to the first moving assembly and a damper body between the outside tab and the inside tab. The second damper includes an outside tab attached to the housing, an inside tab attached to the second moving assembly and a damper body between the outside tab and the inside tab. The width of the damper body of the first damper as measured in a direction of measurement perpendicular to the movement axis is greater than the width of the surround body of the first surround in said direction of measurement. The width of the damper body of the second damper as measured in said direction of measurement is greater than the width of the surround body of the second surround in said direction of measurement.

A transducer element comprises an enclosure with a multi-walled frame, walls, and a planar diaphragm. The diaphragm is configured to generally move orthogonally with respect to the directly coupled pressure wave propagation, and it bisects the depth of the enclosure to form two independent acoustic chambers. The enclosure includes lids with ports, at least one port for each chamber. The lids are substantially perpendicular to the diaphragm and separated by the depth of the enclosure. The transducer element may be part of a transducer that utilizes multiple elements with similar designs to produce higher volume displacement, allowing for higher SPL output when used in loudspeaker applications. Additional planar diaphragms may also be present in each transducer element.

A loudspeaker device includes first and second diaphragms arranged co-axially in an opposed relation to each other and having a rear volume in-between, each diaphragm having a plurality of motors operatively coupled thereto, and a frame having first and second ends, and first and second rims provided at the first and second ends, respectively. The motors of the first and second diaphragms are arranged in the same plane, and the motors are provided on the frame around the periphery of the first and second diaphragms.

A through hole is formed in an inner-side yoke making up a magnetic circuit portion, passing therethrough following a vibration direction of a vibration unit, and circuit boards are disposed in the through hole. The circuit boards are disposed with board surfaces thereof following the vibration direction of the vibration unit. Also, an opening area of a middle space across which the circuit boards oppose each other is larger than opening areas of side spaces. Accordingly, flow quantity of air through the through hole can be obtained, increase in air resistance at the time of vibration of the vibration unit can be suppressed, and also wind velocity can be obtained, whereby cooling effects of heat-generating components mounted on the circuit boards can be improved.

An audio transducer includes a diaphragm assembly. The diaphragm assembly can include a diaphragm, an attachment portion that circumferentially surrounds the diaphragm, and a flexible surround extending between the diaphragm and the attachment portion. The audio transducer can include a voice coil coupled to the diaphragm where the voice coil has a voice coil lead. The audio transducer can include a carrier that circumferentially surrounds the voice coil. The carrier can include an annular mounting surface, with the attachment portion of the diaphragm assembly being able to attach to the mounting surface, and a channel formed in the mounting surface. The voice coil lead can extend through the channel.

The present application provides a speaker, which comprises a housing as well as a magnetic circuit system and a vibration system arranged the housing, the vibration system comprises a planar first voice coil which can generate mechanical motion under the action of a magnetic field of the magnetic circuit system, a planar first vibration diaphragm driven by the first voice coil, and the first voice coil is arranged on the first vibration diaphragm; the magnetic circuit system comprises a plurality of magnets, a gap is formed between the magnets, and at least a portion of the first voice coil corresponds to the gap between the magnets. The present speaker is different from a conventional moving-coil type speaker, and the speaker can be made smaller than a conventional moving-coil type speaker and with respect to high frequency performance, the speaker has higher sound pressure and a better bandwidth.