NilesメーカーSI-275の使用説明書/サービス説明書
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INST ALLA TION & OPERA TION GUIDE B LENDING H IGH F IDELITY AND A RCHITECTURE ® Systems Integration Amplifi er ® ®.
CONGRA TULA TIONS! Thank you for purchasing the Niles SI-275, one of the most flexible and conve- nient amplifiers ever offered. Like all Niles products, the SI-275 is built to the highest standards of quality control and reliability. Wi th p ro pe r in st al la ti on a nd operation, you'll enjoy years of trouble-free use.
INTRODUCTION The SI-275 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.
FEA TURES AND BENEFITS Real W orld Power The SI-275 delivers 75 watts per channel at 8 Ohms and 1 00 watts per channel at 4 Ohms. You’ll get tremendous bass and dynamics from every pair of speakers powered by an SI-275.
T urn-On Modes The SI-275 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-275 to interface with any kind of system and have the unit automatically turn on.
INST ALLA TION CONSIDERA TIONS Placement Place the SI-275 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 urn-On Modes The SI-275 draws more current than a preamplifier’s switched AC outlet can safe- ly 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.
Multiple Speaker Loads The SI-275 is stable into very low impedance loads. This means you can safely operate three pairs of 8 ohm speakers (a 2.67 ohm load) directly connected to the SI-275. Note that the SI-275 does not have on/off speaker switching built in.
INST ALLA TION CONSIDERA TIONS 8 Cable and W ire 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 ter- minal of the SI-275 they are connected to.
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.
Binding posts for speaker connections. IEC receptacle for AC power cord. NOTE: AC receptacle must be easily accessible. FRONT AND REAR P ANEL DET AILS 10 ut a e Level Adjustment screws enable you to preset the maximum system volume (or match levels with another amplifier).
INST ALLA TION Setting the T urn- On Mode Switch The SI-275 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.
12 INST ALLA TION Speaker W ire Connections C A 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.
Line Level Audio Input C A UTION! THE AMPLIFIER MUST BE OFF WHENEVER Y OU MAKE CHANGES T O 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.
14 INST ALLA TION AC Power Plug STEP Plug the female IEC socket of the sup- plied AC cord into the IEC r eceptacle on the rear of the amplifier . Plug the 2 prong plug into a corr ectly gr ounded 1 20V 60 Hz wall outlet. CAUTION! T ypically the preamp/r eceiver’ s switched outlet is not rated for a power amplifier .
OPERA TION 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 cir- cuitry —including the sensing circuitry.
16 TROUBLESHOO TING GUIDE TROUBLESHOO TING 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.
17 TROUBLESHOO TING GUIDE (continued) SYMPT OM Hum from the speakers Amp will not turn on Bass sound is weak and the stereo image is “phasey” or “blurry” sounding in one r oom POSSIBLE CA USES AND TEST PROCEDURE Check for faulty cables, faulty source material, an ungrounded phono system or a defective component.
SPECIFIC A TIONS 18 SPECIFIC A TIONS Design Principle Linear voltage/current amplification. Continuous Average Power Output 75 watts per channel RMS at 8 ohms. 1 00 watts per channel RMS at 4 ohms. Input Impedance Approximately 15K ohms Input Sensitivity .
Niles Audio Corporation www .nilesaudio.com 1 23 3 1 S. W . 1 30 Street Miami, Florida 3 3 1 86 T el: (305) 238-43 73 Fax: (305) 238-0 1 85 © 2005 Niles A udio Corporation.
デバイスNiles SI-275の購入後に(又は購入する前であっても)重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります:
Niles SI-275をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはNiles SI-275の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Niles SI-275の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Niles SI-275で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Niles SI-275を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はNiles SI-275の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Niles SI-275に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちNiles SI-275デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。