Kenwood KDV-412 Instruction Manual page 70

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SWPRE (Switchable preout)
This function sets audio to be output by the preamp
output terminal.
SW : Outputs audio used by the subwoofer.
AV : Outputs audio not affected by audio controls. Is set
when connected to a rear monitor.
SYNC (Synchronize Clock)
Synchronizes time data sent from an RDS station with
the unit's built-in clock.
Synchronization takes 3 to 4 minutes.
M/V (Macrovision Version)
Displays the version of copyright protection technology
used in a DVD.
ZONE2
Sets the output destination (front speakers or rear
speakers) of the sub source when the dual zone
function is ON.
70 KDV-412