Krell Industries MASTER REFERENCE SUBWOOFER - Manual (Page 25)

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1 Power Button
Use this button to switch the Master Reference Subwoofer from the stand-by to
the operational mode.
2 Power LED
The blue power LED illuminates when the Master Reference Subwoofer is in the
operational mode and flashes when any remote control key is pressed.
3 Stand-by LED
The red stand-by LED illuminates when the back panel power switch is in the up
position and the Master Reference Subwoofer is in the stand-by mode.
4 Front Panel Display
The front panel display provides operating status messages, including power,
crossover filter selection and status, phase, and menu options and settings.
5 Infared Sensor
The infrared sensor, located inside the front panel display, receives commands
from the Master Reference Subwoofer remote control. For proper remote control
operation, make sure the infrared sensor is not covered or obstructed.