SONY STR- 471 AM/FM AV STEREO RECEIVER. 5.1 Channel with Dolby Pro Logic, Surround & more. 24-bit DSP for Dolby Digital, Pro Logic, and Digital Cinema Sound [Theater & Hall]. The major feature of the FM tuner section of theSony STR-471 is the system which detects ant difference in frequency between IF signal and the reference signal.
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