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INSTA L L ATION & OPERATION GUIDE
SI-2125
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Systems Integration Amplifier
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B LENDING H IGH F IDELITY AND A RCHITECTUR E
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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
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INTRODUCTION 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; home theater, stereo, outdoor speakers and background music. The S
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FEATURES AND BENEFITS FEATURES AND BENEFITS 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. r a p s n a r T The audio circuitry of the SI-2125 is constructed using the finest parts available; including 1% metal film resistors, high quality capacitors, and oversized heat sinks. All this attention to technical detail cr
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FEATURES AND BENEFITS T 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. n o i t c e t o The SI-2125 is equipped with sophisticated protection circuits. In the unlikely event that a problem occurs, the amplifier shuts itself off. When conditions return to normal, regular operation resumes. g n
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INSTALLATION CONSIDERATIONS INSTALLATION CONSIDERATIONS 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. The SI-2125, like any hi-fi component, will last much longer if it is given adequate ventilation for proper cooling. When installing the
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INSTALLATION CONSIDERATIONS T 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 for turning the SI-2125 on and off. Constant - The auto turn-on circuitry is off. The front panel master power switch operate
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INSTALLATION CONSIDERATIONS 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 channel's red terminal becomes negative. DO NOT USE THE BLACK NEGATIVE (-) TERMINALS. THE SIGNAL IS AT THE RED POSITIVE (+) TERM
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INSTALLATION CONSIDERATIONS Niles SI-2125 Niles HDL-6 Speaker Selection System AMPLIFIER SPEAKER 6 SPEAKER 5 SPEAKER 4 SPEAKER 3 SPEAKER 2 SPEAKER 1 L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ 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). e r i It will be easier to reconfigure
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FRONT AND REAR PANEL DETAILS Red “Power” LED confirms the amplifier is Green“Active” LED lights when the connected to a live AC power outlet. (and amplifier circuitry has been turned on by that the master power switch is on). the Turn-On circuits. Front panel “Master Power” switch turns The red “Protect” LED indicates the amp has shut off the entire amplifier, including the down because there is a fault in the speaker, the Turn-On circuitry. wiring, or with the SI-2125 itself. Main Inputs en
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FRONT AND REAR PANEL DETAILS Level Adjustment screws enable you to preset the maximum system volume (or match levels with another amplifier). Bridge mode switch IEC receptacle for AC Binding posts for speaker connections. power cord. 10
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INSTALLATION INSTALLATION Pg. 11 Setting The Turn-On Mode Switch Pg. 13 Line Level Audio Inputs 11 Control Output 13 Cascade Audio Outputs 12 Speaker Wire Connections 14 AC Power plug n- r u 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. Slide the switch with your fingernail or a 1/8" slotted screwdriver blade. r t n o C This termi
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INSTALLATION r i r e k a e p S CAUTION! All speaker wire connections must be made with the amplifier Off. Bare Wire Banana Plugs Unscrew the red or There are many types of black plastic knob, banana plugs, some insert the bare wire crimp, some solder. The end into the opening, Niles gold banana plug and then tighten the has a quick-connect knob until the wire is binding post for the securely clamped. bare wire on the body of the plug. A banana plug is simply inserted into the jack
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INSTALLATION CAUTION! THE AMPLIFIER MUST BE OFF WHENEVER YOU MAKE CHANGES TO THE INPUT CONNECTIONS. STEP Use audio patch cables with RCA phono plugs attached to the ends. 1. Label all of the interconnecting cables for the sources they connect to. Connect outputs from your sources to inputs on the amplifier. Never connect a 2. Connect the sources by inserting the source or preamplifier’s input (e.g., record RCA plugs into the amplifier’s jacks. inputs) to the inputs of your SI-2125.
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INSTALLATION STEP Plug the female IEC socket of the Just like a computer or printer, the SI-2125 supplied AC cord into the IEC has an AC cord which unplugs either at the receptacle on the rear of the amplifier. amp or at the wall for your convenience. If you use a grounded power strip, surge Plug the 2 prong plug into suppressor or extension cord, verify that 120V 60 Hz wall outlet. proper ground is maintained. The SI-2125 draws a maximum of CAUTION! Typically the approximately 700 watt
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OPERATION OPERATION 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). The power LED indicates that the AC co
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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. POSSIBLE CAUSES AND TEST PROCEDURE SYMPTOM Short circuit or loose wire at the speaker or No sound on one channel amplifier terminals. Check that the connections are
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TROUBLESHOOTING GUIDE TROUBLESHOOTING GUIDE (continued) SYMPTOM POSSIBLE CAUSES AND TEST PROCEDURE Hum from the speakers Check for faulty cables, faulty source material, an ungrounded phono system or a defective component. AC power cord must be plugged into a working outlet. Amp will not turn on Master power switch must be on. Bass sound is weak and The loudspeakers are wired out of phase. the stereo image is Reverse the connections at the back of one speaker. Make sure that the Bridge M
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SPECIFICATIONS SPECIFICATIONS Linear voltage/current amplification. A s u o u n i t n o C 125 watts per channel RMS at 8 ohms. 200 watts per channel RMS at 4 ohms. 300 watts bridged channel RMS at 8 ohms. 18K ohms .878V for 8Ω rated output Vl l a r e v O 33 dB r F Bandwidth Limited from 10 Hz to 100 kHz T 8 Ohms .02% THD from 20 Hz to 20 kHz @ full rated power 4 Ohms .02% THD from 20 Hz to 20 kHz @ full rated power 17" wide 5 1/2" high (including feet) 13-1/8" deep W
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Niles Audio Corporation www.nilesaudio.com 12331 S.W. 130 Street ©2003 Niles Audio Corporation. Because Niles strives to continuously improve its products, Niles reserves the right to change product specifications without notice. Miami, Florida 33186 Niles, the Niles logo and Blending High Fidelity and Architecture are registered trademarks of Niles Audio Corporation. Systems Integration Amplifier and Tel: (305) 238-4373 BusMatrix are trademarks of Niles Audio Corporation Printed in the
