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INSTALLATION CONSIdERATIONS
TURN-ON mOdES
The Niles System Integration Amplifi er
®
draws more current than a preamplifi er’s
switched AC outlet can safely supply. Also, your preamplifi er may “thump” at
dangerous volumes if the amplifi er is already on when the preamp turns on. It is
usually best to turn the amplifi er on only when it is needed. The Turn-On Mode
selector switch gives you three options for turning the amplifi er on and off.
Audio sense is the factory default setting.
CoNSTANT -
The auto turn-on circuitry is off. The front panel master power
switch operates the amplifi er. In is “On”, out is “Off”.
AuDIo SENSE -
The master switch on the front panel must be in the “On”
position. The amplifi er 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 amplifi er is turned on. Once the audio signal
stops, the sensing circuit waits two minutes, then turns the amplifi er 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 Trigger Plug is inserted into the rear panel connector and the
sensing circuitry detects a voltage, the amplifi er is turned on. Once the Trigger
voltage is turned off, the sensing circuit instantly turns the amplifi er off. The
amplifi er is off when there is no 3-24V AC or DC voltage detected at the trigger
input. Voltage triggers can be supplied by Niles 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 fi lter capacitor will delay the turn-off of the amplifi er. Trigger
sources must be 3-24VAC or DC, 20mA or greater.
INSTALLATION CONSIdERATIONS
100-120V / 220-240V~
50 / 60Hz 600W
S y s t e m s
I n t e g r a t i o n
A m p l i f i e r
®
TURN ON MODE
AUDIO SENSE
CONSTANT
3-30V
AC/DC
TRIGGER
INPUT
12V
CONTROL
OUT
L
R
L
R
BUS
OUTPUT
FOR
BRIDGED
MODE
L
R
LEVELS
MAIN BUS
INPUT
STEREO
BRIDGED
CLASS 2 WIRING
LEFT
RIGHT
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
operation.
Niles Audio, Carlsbad, California, USA
Designed and Engineered in the U.S.A. Made in China
T5AL, 250V
Serial No.
CAUTION: replace only with same type and rating of fuse.
ATTENTION: remplacer uniquement avec le même type
et calibre du fusible.
Minimum impedance:
2.66 Ω (stereo mode)
4 Ω (bridged mode)
L
R
L
R
BUS
OUTPUT
FOR
BRIDGED
MODE
L
R
LEVELS
MAIN BUS
INPUT
STEREO
BRIDGED
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
operation.
9901253-Rev-A-SI-2150Manual.indd 8
6/8/12 9:43 AM
