Sony DAV-DX155 Operating Instructions Manual page 28

Tip
• When listening to MP3 format recordings using a portable audio source, you can enhance the sound.
Press FUNCTION to select "AUDIO." Connect the portable audio source. Press SOUND FIELD repeatedly until
"A.F.D. STD" appears in the front panel display.
To cancel, select other than "A.F.D. STD."
Note
• Be sure to make connections securely to avoid hum and noise.
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