Abstract: A speaker includes a frame, a diaphragm disposed in a top end of the frame of the speaker and a bobbin disposed below the diaphragm. A voice coil is wound around a bottom end of the bobbin and a magnetic member, which has a groove in which the bottom end of the bobbin around which the voice coil is wound, is inserted and reciprocated in a straight line upward and downward. A central pillar is fixed to the magnetic member at a center of the bobbin and extends parallel to the movement of the bobbin. A damper supports an inner circumferential surface of the bobbin from the central pillar. The damper additionally supports an outer circumferential surface of the bobbin, from the frame, so as to allow the bobbin to reciprocate in a straight line. This results in minimization of wobble and distortion, so that accurate sound is generated.

Abstract: A speaker includes a speaker body; a cone paper movably supported by the speaker body; and a magnetic driving unit disposed on the speaker body to vibrate the cone paper, wherein the cone paper includes at least two layers made of different materials.

Abstract: A speaker includes a frame, a diaphragm disposed in a top end of the frame of the speaker and a bobbin disposed below the diaphragm A voice coil is wound around a bottom end of the bobbin and a magnetic member having a groove in which the bottom end of the bobbin around which the voice coil is wound, is inserted and reciprocated in a straight line upward and downward A central pillar is fixed to the magnetic member at a center of the bobbin and extends parallel to the movement of the bobbin. A damper supports an inner circumferential surface of the bobbin from the central pillar. The damper additionally supports an outer circumferential surface of the bobbin, from the frame, so as to allow the bobbin to reciprocate in a straight line. Support of the bobbin by the damper in both lengthwise and width directions results in minimization of wobble and distortion, so that accurate sound is generated by the speaker.

Abstract: A speaker includes a speaker body; a cone paper movably supported by the speaker body; and a magnetic driving unit disposed on the speaker body to vibrate the cone paper, wherein the cone paper includes at least two layers made of different materials.

Abstract: An audio processing apparatus includes an amplification unit to receive and amplify an audio signal, a power source unit to provide power source to the amplification unit, and a signal processing unit to adjust the power source level provided to the amplification unit based on audio signal level and power source level. Accordingly, high-quality audio may be reproduced.

Abstract: An audio device, an Audio/Visual (NV) system having the audio device, and a method to control the audio device, the audio device including a receiver connected to a transmitter of an external device to receive a signal from the external device, and a microcomputer to control power supply and audio output according to whether the signal is received.

Abstract: An electronic device and a method to control an output thereof are provided. The electronic device includes a controller to control whether to output non-encrypted multimedia data to an external device based on whether the external device is communicatively connected to the electronic device, and an interface to output the non-encrypted multimedia data to the external device under the control of the controller.