Marantz MODEL 40n Stereo 140W Integrated Amplifier (Black) - Manual (Page 67)

Volume Limit
Make a setting for maximum volume. The volume cannot be increased
above this setting.
Off
(Default):
Do not set a maximum volume. (100)
95 / 90 / 85 / 80
Low Pass Filter
Sets the low pass filter for the subwoofer output. Set this according to your
speakers and subwoofer. The output audio signal has a lower frequency
than the set value.
40 Hz / 60 Hz / 80 Hz / 100 Hz / 120 Hz (Default: 80 Hz)
Contents Connections Playback Settings Tips Appendix
67
Front panel Rear panel
Remote control
unit
Index