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Installation Considerations
Turn-On Modes
The Proficient 4-Channel Amplifier draws more current than a preamplifier's
switched AC outlet can safely supply . Also, your preamplifier may "thump" at
dangerous volumes if the amplifier is already on when the preamp turns on .
It is usually best to turn the amplifier on only when it is needed . The Turn-On Mode
selector switch gives you three options for turning the amplifier on and off .
Audio sense is the factory default setting .
TRIGGER IN
IN
IN
IN
IN
OFF ON
100Hz
100Hz
100Hz
100Hz
PAS-A4100
20Hz
20Hz
20Hz
20Hz
BRIDGE
1
2
3
4
1
2
3
4
NORMAL
TRIGGER OUT
OUT
OUT
OUT
OUT
AUTO
TRIGGER
CAN/ICES-003(B)/NMB-003(B)
Analog High-Pass Filters
Switch left for 20Hz, ideal for subwoofers and large full range speakers . Middle
is flat (no filter) . Switch right for 100 Hz, ideal for speakers with 3- 7" woofers,
speakers and larger speakers when paired with a sub .
-
NORMAL
The auto turn-on circuitry is off . The front panel master power switch
operates the amplifier . In is "On", out is "Off" .
-
AUDIO SENSE
The master switch on the front panel must be in the "On"
position . The amplifier is off when there is no audio signal present at either the
left or the right input, but the sensing circuitry is on . The turn-on sensing circuitry
looks for a tiny amount of audio signal present at any of the audio inputs . If it
detects a signal, the amplifier is turned on . Once the audio signal stops, the
sensing circuit waits 30 minutes, then turns the amplifier off .
3-24 VOLT AC/DC OPTO-ISOLATED VOLTAGE TRIGGER - The Power switch
on the front panel must be in the "On" position for the voltage trigger to function .
When a 3 .5mm Mono plug is inserted into the rear panel connector and the
sensing circuitry detects a voltage, the amplifier is turned on . Once the Trigger
voltage is turned off, the sensing circuit instantly turns the amplifier off . The
amplifier is off when there is no 3-24V AC or DC voltage detected at the trigger
input . Voltage triggers can be supplied by Nice automated switchers, some video
projectors, some surround sound processors, or something as simple as a 12 volt
AC wall adapter plugged into the switched outlet of your stereo receiver . Linear DC
wall adapters are not recommended; the long discharge time of the DC adapter's
filter capacitor will delay the turn-off of the amplifier . Trigger sources must be
3-24VAC or DC, 20mA or greater .
9
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Troubleshooting
