6english, 2 phones jack for stereo headphones, 3 a/d (analog/digital) selector button – Marantz SR4300 User Manual
Page 10: 4 ht-eq button, 5 s- (source) direct button, 6 dimmer button, 7 mute button, Fl display a test tone indicator, S disp (display off) indicator, D tuner’s indicators
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