Stellar Industries SLA470 - Manual (Page 6)

#3) L/R Input #2 Feed-through Output
This output is provided as a convenience feed-through from the Line #2 Input. What ever source
is connected to the Line #2 Input, will play through this line level output. This is ideal for daisy
chaining multiple amplifiers to drive a large number of zones. This output is unaffected by the auto-
switching of the SLA Amplifier, as it will always feed from the Line #2 Input.
#4) Speaker Level Input
This input is intended to accept a signal directly from the speaker output of another audio amplifier.
This can be useful if the audio source feeding the SLA Amplifier has no line level output, such as a
television, or older stereo system.
This input is also useful if an existing whole house audio system is in place, and it is desired to
connect additional zones away from the central system. Or, if a room is added to an existing
system, that requires connection of a large, high powered pair of speakers, or a passive subwoofer.
This Speaker Level Input can be directed to either Input #1 (priority) or Input #2 (default) by use
of the selector switch directly above the input.
#5) Speaker Input Selector
Directs the Speaker Level Input to either #1 or #2. When in the #2 position, the speaker level
input will be provided at line level at the #2 Feed-Through Output.
#6) Master Amplifier Level Control
These independent Left/Right controls act as the main volume control for this amplifier. These are
located on the rear to allow the installation contractor to limit the maximum volume level of the
system. The front panel volume control acts as a trim adjustment, relative to the position of these
rear controls.
#7) Stereo / Bridged–Mono Mode Selector
This selector allows the amplifier to act as a stereo (two channel) amplifier, or a single channel
mono amplifier, with the power of both channels added together. This is useful when using the
amplifier to drive a passive subwoofer.
When using the amplifier in bridged mode, be certain to:
• Use speaker loads of 8ohm or higher. Speakers or combinations of speakers that yield less
than 8ohms can damage the amplifier
• Only connect to the “A” speaker output
• Be certain to observe proper connections
• Your signal source should be connected to both Left and Right input channels
• Master level controls should be set at exactly the same level
• Front panel balance control should be set at the mid position
#8) 12V Trigger Input
When the Power On/Off Mode Selector is in the Trigger position, the amplifier can be externally
switched ON and OFF from this input. When supplied with 12VDC, the amplifier immediately
switches on. When 12VDC is removed, the amplifier immediately switches off. This input is a two-
conductor 3.5mm connector, positive tip polarity. It should be provided with a 12VDC signal only.
#9) 12V Trigger Output
This output provides 12VDC, 100mA to control external devices from the ON/OFF operation of this
amplifier. When the amplifier is on, 12VDC is immediately present, and switches off immediately
when the amplifier switches off. This follows whether the Auto-On, 12V Trigger Input or manual
ON/OFF control are used to turn the amplifier on. This allows the amplifiers Auto-Power-On function
to control external devices. This output is a two-conductor 3.5mm connector, positive tip polarity.
Caution: Do not connect loads greater than 100mA to this output.
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