Installation Considerations
Turn-On Modes
The Niles System Integration 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. | |
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
3-30V
AC/DC
CONSTANTTRIGGER
INPUT
This device complies with Part 1
Operation is subject to the follo
(1)this device may not cause ha
LL (2) this device must accept any i
| LEVELS | | FOR | | including interference that may |
| | | operation. | |
| | | | |
L | | R | BRIDGED | | | |
| MODE | | | |
| | | | | |
| | | R | R | STEREO | BRIDGED |
| | | | |
| | | MAIN BUS | BUS | | |
| | | INPUT | OUTPUT | | |
Constant - 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 two 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 Trigger 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 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 filter capacitor will delay the turn-off of the amplifier. Trigger sources must be 3-24VAC or DC, 20mA or greater.
