| 摘要 |
A sound reproduction device for both USB digital and analog inputs improves S/N by reducing noise. The sound reproduction device comprises a USB signal input (1), an analog signal input (3), a USB interface (2) for demodulating a USB signal, a signal processor (4) for processing demodulated USB and analog signals, a power amplifier (5) for amplifying the processed signals, a speaker (6) for reproducing sounds, and a control (7) for controlling the operation of the signal processor and the power amplifier depending on the condition of the signal inputs for the USB signal and the analog signal.
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