Niles SI-250 オーナーマニュアル

NILES AUDIO CORPORATION – 1-800-BUY-HIFI – 1-760-710-0992

2 CHANNEL, BRIDGABLE POWER AMPLIFIERS

The front panel switch is a master or “vacation” power switch. No matter which 
turn-on mode you have selected, the master power switch will turn off all 
circuitry including the sensing circuitry. If you will not be using the amplifier for 
an extended period of time, turn the master power switch “Off” (push button 
switch out). When you would like to return to normal operation, turn the switch 
“On” (push button switch in).

Important Notes: Equipment is not completely disconnected from main power 
source when power switch is in the “OFF” position.

The power LED indicates that the AC cord is plugged into a working AC power 
receptacle and that the power switch is in the “On” position.

The bicolor Status LED illuminates “green” when the amplifier circuitry has been 
turned on by the Turn-On circuits, and illuminates “red” to indicate activation of 
the amplifier’s built-in protection circuitry due to either a fault in the wiring or the 
speaker, or with the Niles System Integration Amplifier

®

 itself.

The rear panel level adjustment screws allow you to adjust the level of the Niles 
System Integration Amplifier

®

 relative to other amplifiers in your system. Use 

a 1/8” slotted screwdriver to adjust the screws. If the Niles System Integration 
Amplifier

®

 is the only amplifier in your system, leave the screws at their factory 

default setting (12:00 position).

The internal parts of the Niles System Integration Amplifier

®

 are electronic 

and require no maintenance. Once a year it is appropriate to twist the RCA 
connectors on each input to remove corrosion and improve conductivity. You 
can clean the amplifier with soft cloth or paper towel dampened with water or a 
mild detergent. Do not use any spray-type, abrasive cleaners on the amplifier.