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Niles SYMPTOM SI-2125 User Manual

Systems integration stereo power amplifier.
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CONGRATULATIONS!
Thank you for purchasing the Niles SI-2125, one of the most flexible and
convenient amplifiers ever offered. Like all Niles products, the SI-2125 is built to
the highest standards of quality control and reliability. With proper installation and
operation, you'll enjoy years of trouble-free use.
Niles manufactures the industry's most complete line of custom installation
components and accessories for audio/video systems. For a free full line catalog write:
Niles, Catalog Request, P .O. Box 160818, Miami, Florida 33116-0818
TABLE OF CONTENTS
INTRODUCTION
FEATURES AND BENEFITS
INSTALLATION CONSIDERATIONS
FRONT AND REAR PANEL DETAILS
INSTALLATION
OPERATION
TROUBLESHOOTING GUIDE
SPECIFICATIONS
CAUTION: TO REDUCE
THE RISK OF ELECTRICAL
SHOCK, DO NOT REMOVE
COVER. NO USER-SERVICE-
ABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED
SERVICE PERSONNEL.
CAUTION: TO PREVENT ELECTRICAL SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT
ATTENTION: POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE LAME LA PLUS LARGE DE LA FICHE
DANS LA BOURNE CORRESONDANTE DE LA PRISE ET POUSSER JUSQU'AU FOND
WARNING: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR
MOISTURE
1
CAUTION
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated dangerous voltage within the
product's enclosure that may be of sufficient magnitude
to constitute a risk of electric shock to persons.
The exclamation point within an equivalent triangle is
intended to alert the user to the presence of important
operating and maintnance (servicing) instructions in the
literature accompaying the appliance.
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3
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9
1 1
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   Summary of Contents for Niles SYMPTOM SI-2125

  • Page 1 CONGRATULATIONS! Thank you for purchasing the Niles SI-2125, one of the most flexible and convenient amplifiers ever offered. Like all Niles products, the SI-2125 is built to the highest standards of quality control and reliability. With proper installation and operation, you'll enjoy years of trouble-free use. Niles manufactures the industry's most complete line of custom installation components and accessories for audio/video systems.
  • Page 2 INTRODUCTION The SI-2125 is a member of the award-winning Niles Systems Integration Amplifier family. It is designed for home theaters and whole house audio systems requiring high power. Niles specifically created Systems Integration Amplifiers to solve the problems of interfacing with different brands and models of equipment, different acoustic environments in different rooms, and different kinds of applications;...
  • Page 3: Features And Benefits

    FEATURES AND BENEFITS Real World Power The SI-2125 delivers 125 watts per channel at 8 Ohms, 200 watts per channel at 4 Ohms and 300 watts bridged at 8 ohms. You’ll get tremendous bass and dynamics from every pair of speakers powered by an SI-2125. Transparent Sound The audio circuitry of the SI-2125 is constructed using the finest parts available;...
  • Page 4 Turn-On Modes The SI-2125 features three turn-on modes: 1. Music Sense 2. External Voltage Trigger 3. Manual Turn-On via the front panel switch. You can configure the SI-2125 to interface with any kind of system and have the unit automatically turn on. Automatic Protection The SI-2125 is equipped with sophisticated protection circuits.
  • Page 5: Installation Considerations

    INSTALLATION CONSIDERATIONS Placement Place the SI-2125 on a flat level surface like a table or shelf. It should be placed upright so that its weight rests on the four attached feet. Placing the weight of the amplifier on the rear or front panel for even an instant will result in damage to the amplifier's connectors and controls.
  • Page 6 Turn-On Modes The SI-2125 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.
  • Page 7 Bridged Mode The SI-2125’s bridged mode switch allows you to create a more powerful amplifier by combining both channels into one (8 ohm minumum). In the bridged mode, connect the speakers to the left red positive terminal and the right red positive terminal.
  • Page 8 SPEAKER 6 ON OFF NILES CONSTANT PROTECTION Niles Audio Corporation, Inc. Miami, Florida USA Speaker selection systems allow each pair of speakers to be turned on and off from your equipment location (or even via remote control). Cable and Wire...
  • Page 9 Red “Power” LED confirms the amplifier is connected to a live AC power outlet. (and that the master power switch is on). Front panel “Master Power” switch turns off the entire amplifier, including the Turn-On circuitry. Main Inputs enable you to route a stereo line level source to the SI-2125.
  • Page 10 Level Adjustment screws enable you to preset the maximum system volume (or match levels with another amplifier). Bridge mode switch Binding posts for speaker connections. IEC receptacle for AC power cord.
  • Page 11 INSTALLATION Pg. 11 Setting The Turn-On Mode Switch 11 Control Output 12 Speaker Wire Connections Setting the Turn-On Mode Switch The SI-2125 has three turn-on modes. Select which mode you desire by sliding the mode switch. See Installation Considerations on page 6 for more information about each of the turn-on modes.
  • Page 12: Speaker Wire Connections

    Speaker Wire Connections CAUTION! All speaker wire connections must be made with the amplifier Off. Bare Wire Unscrew the red or black plastic knob, insert the bare wire end into the opening, and then tighten the knob until the wire is securely clamped.
  • Page 13 Line Level Audio Input CAUTION! THE AMPLIFIER MUST BE OFF WHENEVER YOU MAKE CHANGES TO THE INPUT CONNECTIONS. STEP 1. Label all of the interconnecting cables for the sources they connect to. 2. Connect the sources by inserting the RCA plugs into the amplifier’s jacks. Cascade Audio Outputs The “Cascade Audio Outputs”...
  • Page 14 AC Power Plug STEP Plug the female IEC socket of the supplied AC cord into the IEC receptacle on the rear of the amplifier. Plug the 2 prong plug into 120V 60 Hz wall outlet. CAUTION! Typically the preamp/receiver’s switched outlet is not rated for a power amplifier.
  • Page 15: Power Switch

    OPERATION Power Switch 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”...
  • Page 16: Troubleshooting Guide

    TROUBLESHOOTING GUIDE When there is a problem consult this guide first. If the problem persists, or you have additional questions, call your local Niles dealer or Niles Technical Support at 1-800-289-4434. The most common problems relate to hook up. Call from your telephone extension nearest the system.
  • Page 17 TROUBLESHOOTING GUIDE (continued) SYMPTOM Hum from the speakers Amp will not turn on Bass sound is weak and the stereo image is “phasey” or “blurry” sounding in one room POSSIBLE CAUSES AND TEST PROCEDURE Check for faulty cables, faulty source material, an ungrounded phono system or a defective component.
  • Page 18: Specifications

    SPECIFICATIONS Design Principle Linear voltage/current amplification. Continuous Average Power Output 125 watts per channel RMS at 8 ohms. 200 watts per channel RMS at 4 ohms. 300 watts bridged channel RMS at 8 ohms. Input Impedance 18K ohms Input Sensitivity .878V for 8Ω...
  • Page 19 Niles reserves the right to change product specifications without notice. Niles, the Niles logo and Blending High Fidelity and Architecture are registered trademarks of Niles Audio Corporation. Systems Integration Amplifier and BusMatrix are trademarks of Niles Audio Corporation Printed in the Malaysia 9/03 DS00354AMY...
  • Page 20 I N S T A L L A T I O N & O P E R A T I O N G U I D E SI-2125 Systems Integration Amplifier ® ® ® L E N D I N G I G H I D E L I T Y A N D...

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