Niles Audio SI-2125 manual

B lending H igH F idelity and a rcHitectur e ® Systems Integration Ampli f ie r ® 230 Volts 50Hz Export Version ® INSTALLATION & OPERATION GUIDE[...]

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. 1 TABLE OF CONTENTS IN TRODUCTION 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 en[...]

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 availabl[...]

Turn-On Modes Th e S I- 212 5 f ea tur es th ree tur n-o n m ode s: 1. Mu si c Se nse 2. Ex te rn al Vo lta ge Tr igg er 3. M anu al Tu rn- On vi a th e f ron t pa nel s wit ch . Y ou ca n c on fig ur e t he SI -21 25 to in ter fa ce wi th any ki nd of sy ste m an d ha ve th e un it aut oma tic al ly tu rn on. Automatic Protection The SI-2125 is eq[...]

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. Th e SI- 21 25, [...]

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. The Turn-On Mode selector switch gives you three options [...]

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. In the bridged mode the right channel’s red terminal becomes positive and the left cha[...]

Speaker selection systems allow each pair of speakers to be turned on and off from your equipment location (or even via remote control). INSTALLATION CONSIDERATIONS 8 Cable and Wire It will be easier to reconfigure or troubleshoot your system in the future if you label the cables and wires for their destination or source, rather than which terminal[...]

AC 230V 50Hz Red “Power” LED confirms the amplifier is connected to a live AC power outlet and that the master power switch is on. Green“Active” LED lights when the amplifier circuitry has been turned on by the Turn-On circuits. Front panel “Master Power” switch turns off the entire amplifier, including the Turn-On circuitry. The red ?[...]

Binding posts for speaker connections. Bridge mode switch IEC receptacle for AC power cord. FRONT AND REAR PANEL DETAILS 10 AC 230V 50Hz Level Adjustment screws enable you to preset the maximum system volume (or match levels with another amplifier).[...]

INSTALLATION 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. Control Output This terminal provides a 1 2v DC signal suitable for triggering Niles automated switchers, some mot[...]

12 INSTALLATION 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. Banana Plugs There are many types of banana plugs, some crimp, some solder. The [...]

Line Level Audio Input CAUTION! THE AMPLIFIER MUST BE OFF WHENEVER YOU MAKE CHANGES TO THE INPUT CONNECTIONS. Cascade Audio Outputs The “Cascade Audio Outputs” enable you to connect another amplifier to your preamplifier output. The connectors are gold-plated RCA phono jacks. Connect them to another amplifier’s inputs with a standard audio pa[...]

14 INSTALLATION AC Power Plug STEP Plug the female IEC socket of the supp lie d AC cord in to the IEC receptacle on the rear of the amplifier. Plug the two-prong plug into 230V 50 Hz wall outlet. CAUTION! TYPICALLY THE PREAMP/ RECE IVE R’S SWI TCH ED OUTL ET IS NOT RATED FOR A POWER AMPLIFIER. Jus t li ke a co mpu te r or pri nter, the SI-2 12 5 [...]

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” (push button s[...]

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 1-305-238-4373. The most common problems relate to hook up. Call from your telephone extension nearest the system. SYMPTOM No sound on [...]

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 Che ck for faul ty cabl es, fa ult y so urc e mate ria l, an ungrounded phono system or a defective component. AC power cord must be p[...]

SPECIFICATIONS 18 SPECIFICATIONS Design Principle Linear voltage/current amplification. Continuous Average Power Output 125 watts per channel RMS at 8 ohms, both channels driven. 1 75 watts per channel RMS at 4 ohms, both channels driven. 350 watts bridged channel RMS at 8 ohms. Input Impedance 18K ohms Input Sensitivity .830V for 8 ohm rated power[...]

N I L E S Niles Audio Corporation 1 23 3 1 S . W . 1 30 Stre et M iam i , Florida 33 1 86 T el: (305) 238-4 3 73 Fax: (305) 238- 01 85 www.nilesaudio.com © 2003- 200 9 Nil es Au dio Corp orat ion . Bec aus e Nil es st riv es to cont inu ous ly improve its products, Niles reserves the right to change product specications wit hout notice . Niles [...]