Patent ID: 8126181

Claim:
An acoustic system comprising: a power supply adapter comprising a power supply unit, an amplifier, and a woofer unit which outputs a low range audio sound according to an audio signal; a main unit comprising a micro processing unit (MPU), speaker units which output a mid-high range audio sound according to the audio signal, and a connection terminal for electrically connecting a predetermined electronic apparatus capable of receiving calls and reproducing an audio signal indicating receipt of a call, the MPU being configured to control the power supply unit, the woofer unit, and the speaker units based on a DC power supplied from the power supply adapter, wherein a single housing independent of a display unit encloses the main unit, including the speaker units, the single housing having the connection terminal centrally arranged on a front surface to directly connect to the predetermined electronic apparatus and a plurality of buttons that control the acoustic system arranged on a top surface; and a transmission cable which connects the power supply adapter to the main unit and transmits the audio signal to the power supply adapter from the main unit to output the low range audio sound from the woofer unit, wherein the MPU is configured to automatically detect a call received by the predetermined electronic apparatus, lower a sound volume level being output by the speakers based on the detected call, and output the audio signal indicating receipt of the call received by the predetermined electronic apparatus via the speakers, the MPU is further configured to receive a digital signal from the predetermined electronic apparatus and transmit the digital signal to the power supply adapter via the transmission cable, and the power supply adapter is configured to amplify the received digital signal at the amplifier and output low range audio via the woofer unit according to the digital signal.