Niles Audio SI-2125 manual

INST ALLA TION & OPERA TION GUIDE B LENDING H IGH F IDELITY AND A RCHITECTUR E ® Systems Integr ation Amplif ier ® SI-2 1 2 5[...]

CONGRA TULA TIONS! T hank you for purchasing the Niles SI-2125, one of the most flexible and convenient amplifiers ev er offered. Like all Niles products, the SI-2125 is built to the highest standards of quality control and reliability . W it h pr op er i nsta llat ion and operation, y ou'll enjoy y ears of trouble-free use. Niles manufactures[...]

INTRODUCTION T he 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 Integr ation Amplifiers to solve the problems of interfacing with different brands and models of equipment, different acousti[...]

FEA TURES AND BENEFITS T he SI-2125 delivers 125 watts per c hannel at 8 Ohms, 200 watts per channel at 4 Ohms and 300 watts bridged at 8 ohms. Y ou’ll get tremendous bass and dynamics from every pair of speakers powered b y an SI-2125. T he audio circuitry of the SI-2125 is constructed using the finest parts av ailable; including 1% metal film r[...]

T he SI-2125 features three turn-on modes: 1. Music Sense 2. External V oltage T rigger 3. Manual T urn-On via the front panel switch. Y ou can configure the SI-2125 to interface with any kind of system and ha ve the unit automatically turn on. T he SI-2125 is equipped with sophisticated protection circuits. In the unlikely event that a problem occ[...]

INST ALLA TION CONSIDERA TIONS 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 a[...]

T he SI-2125 draws more current than a preamplifier’ s switched AC outlet can safely supply . Also, y our preamplifier ma y “thump” at dangerous volumes if the amplifier is already on w hen the preamp turns on. It is usually best to turn the amplifier on only when it is needed. The T urn-On Mode selector switc h gives you three options for tu[...]

T he SI-2125’ s bridged mode switc h allows y ou to create a more powerful amplifier by combining both c hannels into one (8 ohm minumum). In the bridged mode, connect the speakers to the left red positiv e terminal and the right red positiv e terminal. In the bridged mode the right channel’ s red terminal becomes positiv e and the left channel[...]

SPEAKER 6 L+ L- R- R+ AMPLIFIER L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ L+ L- R- R+ SPEAKER 5 SPEAKER 4 SPEAKER 3 SPEAKER 2 L+ L- R- R+ SPEAKER 1 C ONSTANT PRO TECTION ON OFF N iles Aud io Corporation, I nc . Miami, Florida USA N ILES Speaker selection systems allow each pair of speakers to be turned on and off fr om your equipment location[...]

Red “P ower” LED confirms the amplifier is connected to a live AC po wer outlet. (and that the master power switc h is on). Green“ Active” LED lights when the amplifier circuitry has been turned on by the T urn-On circuits. F ront panel “Master P ower” switch turns off the entire amplifier , including the T urn-On circuitry . T he red ?[...]

Binding posts for speaker connections. Bridge mode switch IEC receptacle for A C power cord. FRONT AND REAR P ANEL DET AILS 10 Level Adjustment screws enable you to preset the maximum system volume (or match lev els with another amplifier).[...]

INST ALLA TION T he SI-2125 has three turn-on modes. Select which mode y ou desire by sliding the mode s witc h. See Installation Considerations on page 6 for more information about each of the turn-on modes. T his terminal provides a 1 2v DC signal suitable for triggering Niles automated switc hers, some motorized screens, some electric curtain co[...]

12 INST ALLA TION CA UTION! All speaker wire connections must be made with the amplifier Off. Bare W ire 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 T here are many types of banana plugs, some crimp, some solder . T he Niles gold banana [...]

CA UTION! THE AMPLIFIER MUST BE OFF WHENEVER Y OU MAKE CHANGES T O THE INPUT CONNECTIONS. T he “Cascade A udio Outputs” enable you to connect another amplifier to your preamplifier output. T he connectors are gold-plated RC A phono jacks. Connect them to another amplifier’ s inputs with a standard audio patch cable. T he outputs are not buffe[...]

14 INST ALLA TION STEP Plug the female IEC socket of the supplied AC cord into the IEC receptacle on the r ear of the amplifier . Plug the 2 prong plug into 1 20V 60 Hz wall outlet. CAUTION! T ypically the preamp/r eceiver’ s switched outlet is not rated for a power amplifier . Just like a computer or printer , the SI-2125 has an A C cord whic h [...]

OPERA TION T he front panel switch is a master or “v acation” power switc h. No matter which turn-on mode you ha ve selected, the master power switc h 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 switc h “Off” (push button switc [...]

16 TROUBLESHOO TING GUIDE TROUBLESHOO TING GUIDE When there is a problem consult this guide first. If the problem persists, or you ha ve additional questions, call y our local Niles dealer or Niles T echnical Support at 1-800-289-4434. T he most common problems relate to hook up. Call from your telephone extension nearest the system. SYMPT OM No so[...]

17 TROUBLESHOO TING 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 CA USES AND TEST PROCEDURE Check for faulty cables, faulty source material, an ungrounded phono system or a defective component. AC po wer cord must be plugged[...]

SPECIFIC A TIONS 18 SPECIFIC A TIONS Linear voltage/current amplification. 125 watts per c hannel RMS at 8 ohms. 200 watts per c hannel RMS at 4 ohms. 300 watts bridged c hannel RMS at 8 ohms. 18K ohms .878V for 8Ω rated output 33 dB Bandwidth Limited from 1 0 Hz to 1 00 kHz 8 Ohms .02% THD from 20 Hz to 20 kHz @ full rated po wer 4 Ohms .02% THD [...]

N iles Audio Corporation www .nilesaudio.com 1 233 1 S. W . 1 30 Street Miami, Florida 33 1 86 T el: (305) 238-43 73 Fax: (305) 238-0 1 85 © 2003 Niles Audio Corporation. Because Niles strives to continuously improve its pr oducts, Niles r eserves the right to change pr oduct specifications without notice. Niles, the Niles logo and Blending High F[...]