Patent ID: 8565463

Claim:
A loudspeaker system comprising: a cabinet; a first opening formed in the cabinet; a second opening formed in the cabinet; a loudspeaker unit attached to the first opening formed in the cabinet; a gas absorber provided in the cabinet, and being configured to physically adsorb gas in the cabinet to equivalently increase a volume of an inside of the cabinet; a dehumidifier attached to the second opening formed in the cabinet, and being configured to discharge damp air in the cabinet to the outside when a DC voltage is applied thereto; a power supply configured to apply the DC voltage to the dehumidifier; a cover unit configured and arranged to cover the dehumidifier to form a first space inside the cabinet; and a third opening arranged in the cover unit so as to enable communication between a second space which is formed inside the cabinet and the first space formed by the cover unit; a humidity detector configured to detect humidity in the cabinet; and a controller configured to control the power supply to apply the DC voltage to the dehumidifier only when the humidity detected by the humidity detector is higher than a predetermined threshold, wherein the humidity detector is configured to detect a frequency characteristic of a current flowing through the loudspeaker unit, and the controller controls the power supply to apply the DC voltage to the dehumidifier only when a frequency at a predetermined resonance point included in the frequency characteristic is higher than a predetermined threshold.