10The unit can be turned OFF bypressing and holding the Standby button. It willautomatically mute.PHASE button and LEDThis button allows the user to invert the absolute polarity of the signal tocompensate for some recordings that are made out-of-phase. The LED indicateswhether the unit is in its INVERTING or NONINVERTING mode. This function is alsoaccessible via the VK-R3 remote control.LED OFF Non Inverting operationLED ON Inverting operationMONO Button and LEDThe Mono button allows the user to switch the VK-33SE in Mono operation whenthe two channels are summed together. This may be useful, for example, whilelistening to old monophonic recordings. This function is also accessible via the VK-R3 remote control.LED OFF Stereo operationLED ON Mono operationMUTE Button and LEDThe Mute button disables the preamplifier output. It is recommended that theMute be engaged any time the signal cables are changed or any other systemconfiguration changes are being made. This function is also accessible via the VK-R3 remote control.LED OFF Unit in Play modeLED ON Output MutedINPUT selection buttons 1 through 5These allow the user to select any of five available inputs to be played. Theselected input number together with its name will be indicated on the unit frontpanel display as well. This function is also accessible via the VK-R3 remotecontrol.VOLUME KnobThis knob performs different function depending upon the unit’s mode ofoperation. In normal mode it works as volume control knob.