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In S t A ll A t I on & o p E r A t I on Gu I d E
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Systems Integration Amplifier
230 Volts 50Hz Export Version
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B l e n d i n g H i g H F i d e l i t y a n d a r c H i t e c t u r 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. TAbLe Of CONTeNTS In troductIon 2 FEAturES And bEnEFItS 3 InStAllAtIon conSIdErAtIonS 5 Front And rEAr pAnEl dEtAIlS 9 InStAl l AtIon 11 opErA tIon 15 troublESHootInG GuIdE 16 SpEcIFI
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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. t
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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; including 1% metal film resistors, high quality capacitors, and oversized heat sinks. All this attention to technical deta
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feATUReS ANd beNefITS Turn-On Modes t he SI-2125 features three turn-on modes: 1. Music Sense 2. External Voltage t rigger 3. Manual t urn-o n 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. In the unlikely event that a problem occurs, the amplifier shuts itself off. When conditions return to normal, regular operation r
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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. t he SI-2125, like any hi-fi component, will last much longer if it is given adequate ventilation for proper cooling. When installing th
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INSTALLATION CONSIdeRATIONS 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 for turning the SI-2125 on and off. Constant - the auto turn-on circuitry is off. the front panel master power switch o
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INSTALLATION CONSIdeRATIONS 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 channel’s red terminal becomes negative. dO NOT uSE tHE blAcK nEGAtIVE (-) tErMInAlS. tHE SIGnAl IS At tHE rEd poSItIVE (+)
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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). Cable and Wire It will be easier to reconfig
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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 Input
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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 AC 230V 50Hz 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. 1 3 Line Level Audio Inputs 11 Control Output 13 Cascade Audio Outputs 12 Speaker Wire Connections 14 AC Power plug 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. Slide the switch with your fingernail or a 1/8” slotted screwdriver blade. Co
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INSTALLATION Speaker Wire Connections CAUTION! ALL SPeAkeR WIRe CONNeCTIONS MUST be MAde WITh The AMPLIfIeR Off. bare Wire banana Plugs unscrew the red or there are many types black plastic knob, of 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
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INSTALLATION Line Level Audio Input CAUTION! The AMPLIfIeR MUST be Off WheNeVeR yOU MAke ChANGeS TO The INPUT CONNeCTIONS. STeP deSCRIPTION 1. Label all of the interconnecting u se audio patch cables with rc A phono cables for the sources they connect to. plugs attached to the ends. c onnect outputs from your sources to 2. Connect the sources by inserting the inputs on the amplifier. never connect a RCA plugs into the amplifier’s jacks. source or preamplifier’s input (e.g., record inpu
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INSTALLATION AC Power Plug STeP Plug the female IEC socket of Just like a computer or printer, the SI-2125 the 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 two-prong plug into suppressor or extension cord, verify that 230v 50 hz wall outlet. proper ground is maintained. t he SI-2125 draws a maximum of CAUTION! TyPICALLy ThE PREAMP
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OPeRATION 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 switch out). When you would like to return to normal operation, turn the switch ”on” (push button switch in). Power LED the power lEd indicates th
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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 1-305-238-4373. 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 sec
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TROUbLeShOOTING GUIde TROUbLeShOOTING GUIde (continued) SyMPTOM POSSIbLe CAUSeS ANd TeST PROCedURe hum from the speakers c heck 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 the loudspeakers are wired out of phase. and the stereo image reverse the connections at the back of one speaker. Make sure that the bridge Mode Sw
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SPeCIfICATIONS SPeCIfICATIONS Design Principle linear voltage/current amplification. Continuous Average Power Output 125 watts per channel rMS at 8 ohms, both channels driven. 175 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 .720V for 4 ohm rated power Overall Voltage Gain 31.5 db Frequency Response bandwidth limited from 10 Hz to 70 kHz (-1 db) Signal to Noise Ratio 110 db,
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Niles Audio Corporation 12331 S.W. 130 Street Miami, Florida 33186 Tel: (305) 238-4373 ©2003-2009 Niles Audio Corporation. Because Niles strives to continuously improve its products, Niles reserves the right to change product specifications Fax: (305) 238-0185 without notice. Niles, the Niles logo, Systems Integration Amplifier, and Blending www.nilesaudio.com High Fidelity and Architecture are registered trademarks of Niles Audio Corporation. BusMatrix is a trademark of Niles Audio
