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SC-600D Amplifier User’s Manual
(11) IR Input
An IR repeater can be connected to this mini-jack.
(12) 12V Trigger
When this 2-conductor mini-jack is connected, the amplifier remains in power-off mode until
the trigger is applied. The correct trigger is +12V on the tip of the connector relative to the
grounded sleeve.
(13) RS-232 In
Use this port to communicate with an RS-232 controlled touch panel system. See Appendix
A for an explanation of the use of the serial port, available commands, and their formats.
(14) Signal Sensing Auto On/Off Switch
With this switch in the “standby” position, your subwoofer can be safely left with the main
power switched on continuously. The subwoofer amplifier will turn itself on automatically when
an audio signal is present. If no signal is present for approximately 10 minutes, the unit will
switch to standby mode. While in standby mode, your subwoofer amplifier will draw very
minimal power. This function can be disabled by leaving the switch in the “always on” position.
(15) Speaker Level Input Terminals
If you do not connect the SC-602 amplifier to your receiver using the line input/LFE input
connection (Item 10), connect these input terminals to the speaker output terminals of your
amplifier or receiver. If you use this method of connection, make sure to select the “large”
speaker option in the receiver’s set-up menu. Also, select the option for no subwoofer. This
will make sure all bass and LFE information is fed the speaker outputs and be received by
your SC-600D amplifier.
Note: Using both speaker terminals and the line level inputs is not recommended, as this may
damage the SC-600D amplifier or your receiver.
(16) Speaker Level Output Terminals
These connections send a crossed-over speaker-level signal to the front speakers. When
connected in this fashion, your satellite speakers will be crossed over at 80 Hz. This removes
the lower bass frequencies from your satellites, enabling them to do a better job reproducing
high frequencies.
You may also connect your satellites directly to your receiver or amplifier along with the
subwoofer if you wish to bypass this crossover.
An example of a speaker-level connection is shown in Figure 3.