| 摘要 |
A conventional sound reproducing device, such as an am/fm stereo radio receiver, including additional speakers and a volume control device, is connected in circuit with the input of a conventional television receiver to enhance the sound reproduced by the television receiver. An impedance element is selectively switchable in and out of the circuit to change the sound level of the speakers of the radio receiver relative to the sound level of the television speaker or to disconnect the radio receiver. Additional impedance elements are switchable in and out of circuit with the volume control device of the television receiver by switch means located in proximity to a person seated before the television receiver whereby to adjust the sound level of the entire system.
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