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400 Hz Speaking voice, middle frequencies of instrumental music. 1 kHz Presence of vocals. 4 kHz Brightness of the sound. 10 kHz High treble sounds or to reduce high frequency noise/tape hiss. Using the PRESET MODE Use To MANUAL Adjust the sound using the 5 BAND GRAPHIC EQUALIZER. DISCO Get powerful, clear sounds emphasizing low and high range audio. PARTY Get light, bright sounds emphasizing high and middle range audio. LIVE Get wide-ranging sounds having presence. Note When adjusting the 5 BAN