Adjusting the treble (cdx- m670/m620 only), Adjusting the balance (fad) (cdx-m670/m620 only), Adjusting the treble – Sony CDX-M670 User Manual
Page 21: Cdx-m670/m620 only), Adjusting the balance (fad), Adjusting the front and rear volume, Cdx-m770 only)
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