Pioneer SI-245 Stereo Amplifier User Manual
Contents
1. Richt CAUTION TO REDUCE THE RISK OF A A ELECTRICAL SHOCK DO NOT REMOVE COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL Writes Cd SERIAL NUMBER Binding posts for speaker IEC receptacle for AC connections power cord Z N gt gt e Z INSTALLATION 9 Setting The Turn On Mode Switch 13 Cascade Audio Outputs 9 Control Output 14 AC Power plug 10 Speaker Wire Connections 17 Rail Fuse Holders 13 Line Level Audio Inputs Setting the Turn On Mode Switch The SI 245 has three turn on modes Select the mode you wish to use by sliding the mode switch See Installation Considerations on page 6 for more information about each of the turn on modes TURN ON MODE LC 230 F AC DC TRIGGER ae Ml INPUT CONSTANT Slide the switch with your fingernail or a 1 8 slotted screwdriver blade Control Output This terminal provides a 12v DC signal suit able for triggering Niles automated switchers some motorized screens some electric curtain ut Using the controls etc The trigger voltage is present y con only when the amplifier is active or on When the amplifier turns off the 12 volt sig nal is off RO 3 5 mm jack STEP DESCRIPTION 1 Check the requirements of the device The control output has a maximum you want to control current capability of 12vDC 150 mA 2 Connect the 3 5mm Ja2. Turn On Modes The SI 245 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 245 to inter face with any kind of system and have the unit automatically turn on Automatic Protection The SI 245 is equipped with sophisticated protection circuits In the unlikely event that a problem occurs the amplifier shuts itself off When conditions return to nor mal regular operation resumes Status Display for Troubleshooting LED s on the front panel indicate Power Active Status and a Protection Warning With a glance at the front panel a troubleshooter is quickly provided with key infor mation Control Output A 12 volt DC output is provided whenever the amplifier is on allowing you to operate voltage triggered devices like motorized screens and curtains Designed and Engineered in the USA Limited two year parts and labor Warranty _ mi gt A mm N gt Z 7 is mm Z mm VN SNOILVAAGISNOD NOILVTIVISNI INSTALLATION CONSIDERATIONS Placement Place the SI 245 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 may result in damage to the amplifier s connectors and controls The SI 245 like any hi fi component will last much longer if it is give
3. instructions in the SERVICE PERSONNEL literature accompanying the appliance CAUTION TO PREVENT ELECTRICAL SHOCK MATCH WIDE BLADE OF PLUG TO WIDE SLOT FULLY INSERT ATTENTION POUR EVITER LES CHOCS ELECTRIQUES INTRODUIRE LAME LA PLUS LARGE DE LA FICHE DANS LA BOURNE CORRESONDANTE DE LA PRISE ET POUSSER JUSQU AU FOND WARNING TO REDUCE THE RISK OF ELECTRICAL SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE INTRODUCTION The SI 245 is a member of the award winning Niles Systems Integration Amplifier family It is designed for use in home theaters and whole house audio systems and is especially suited for use as a zone amplifier Niles specifically designs Systems Integration Amplifiers to solve the problems installers face when inte grating different brands and models of equipment into various acoustic environ ments in home theater stereo and background music applications The SI 245 brings extremely high current power to a custom installed A V System in a remarkably convenient way zZ Aw fe oO Cc io ie zZ SI 245 Systems Integration Amplifier 230VOLT 50Hz Export Version mi gt Cc A m N gt Z j is mm Z r N FEATURES AND BENEFITS Real World Power The SI 245 delivers 45 watts per channel at 8 Ohms and 70 watts per channel at 4 Ohms You ll get tremendous bass and dynamics from every pair of speakers powered by an SI 245 Transp
4. selection systems offer impedance matching features which will allow you to connect up to ten pairs of speakers to your SI 245 amplifier Niles SI 245 Speaker selection systems allow each pair of speakers to be turned on and off from your equipment location 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 ter minal of the SI 245 they are connected to The SI 245 connects to your preamp source via shielded line level audio cables with RCA phono plugs Use high quality cables with your Niles amplifier for the lowest possible noise and best overall performance Your Niles dealer can rec ommend the proper cable The SI 245 connects to your speakers using 2 conductor speaker wire For most applications we recommend you use 16 or 18 gauge wire For wiring runs longer than 80 feet we recommend 14 gauge wire The binding posts of the SI 245 will accommodate up to 12 gauge wire Larger sizes can be accommodated by attaching banana plugs to the wire Note that the binding posts accept dual banana or single banana connectors TECH TIP L Wire size is expressed by its AWG American CA Wire Gauge number The lower the number the larger the wire i e twelve AWG is ph
5. volt AC wall adapter Niles XF00008 plugged into the switched outlet of your stereo receiver DO NOT USE A DC WALL ADAPTER The long discharge time of the DC adapter s filter capacitor will delay the turn off of the amplifier If you are using a wall adapter or external power supply to provide the trigger it doesn t have to be very large a minimum current capability of 2 5 milliamps for a 3 volt trigger increasing up to a minimum of 38 milliamps for a 30 volt trigger SNOILVAAGISNOD NOILVTIVLSNI SNOILVAAGISNOD NOILVTIVISNI Multiple Speaker Loads The SI 245 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 245 Note that the SI 245 does not have on off speaker switching built in When the amplifier is on so are all of the speakers Niles makes a number of different speaker selection and impedance matching systems Speaker selection systems allow each pair of speakers to be turned on and off from your equipment location or even via remote control That way you know that the speak ers in the bedroom are off so you can avoid waking a sleeping spouse These speak er selectors provide an easy way to terminate all of the wires for more than three pairs Testing and troubleshooting a new system is much easier with the individual room labels and on off switches of a Niles speaker selection system Additionally Niles speaker
6. INSTALLATION amp OPERATION GUIDE Systems Integration Amplifier 230 VOLT 50Hz Export Version BLENDING HIGH FIDELITY AND ARCHITECTURE CONGRATULATIONS Thank you for purchasing the Niles SI 245 one of the most flexible and conve nient amplifiers ever offered Like all Niles products the SI 245 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 compo nents and accessories for audio video systems For a free full line catalog write Niles Catalog Request P O Box 160818 Miami Florida 33116 0818 TABLE OF CONTENTS INTRODUCTION 2 FEATURES AND BENEFITS 3 INSTALLATION CONSIDERATIONS 5 FRONT AND REAR PANEL DETAILS 9 INSTALLATION 11 OPERATION 15 TROUBLESHOOTING GUIDE 16 SPECIFICATIONS 18 The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude CAUTION TO REDUCE to constitute a risk of electric shock to persons THE RISK OF ELECTRICAL SHOCK DO NOT REMOVE COVER NO USER SERVICE The exclamation point within an equivalent triangle is ABLE PARTS INSIDE REFER intended to alert the user to the presence of important SERVICING TO QUALIFIED operating and maintenance servicing
7. arent Sound The audio circuitry of the SI 245 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 creates a sound that is clear and uncolored with phenomenal imaging Freedom From Crosstalk Each channel of the SI 245 is powered via its own independent power supply This increases the isolation between the two channels and minimizes cross talk guaran teeing you absolute silence as the backdrop to your music Current For Reactive Loads The high current design of the SI 245 assures that even unusual and reactive loads are handled with aplomb a massive toroidal transformer with two separate windings one for each of the independent power supplies provides more than ample current to your system Freedom from Fan Noise The oversized heat sinks inside the SI 245 allow the amplifier to stay cool even when operating into low impedance loads without the noise of fan cooled amplifiers Independent Level Controls Each channel has its own independent level control enabling you to precisely match the SI 245 to the rest of your system The level controls also enable you to limit the volume preventing abuse of the system Lifetime Connections The SI 245 features stereo inputs cascade stereo outputs and five way binding posts which are all gold plated to ensure perfect connections without corrosion for years to come
8. ck to the Niles makes an accessory cable control output maintaining proper plug FG00724 polarity tip 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 STEP DESCRIPTION 1 Label all wires 2 Connect one stripped wire end or banana plug to the black terminal and one to the red terminal CAUTION Avoid even a single strand of wire touching the chassis or another connector Banana Plugs There are many types of banana plugs some crimp some solder The Niles gold banana plug has a quick con nect binding post for the bare wire on the body of the plug A banana plug is simply inserted into the jack at the end of the ampli fier s binding post Dual banana plugs will fit the SI 245 bind ing posts If you label the wires for their destination rather than which terminal of the SI 245 they are connected to it will be easier to recon figure your system in the future A Split the speaker wire insulation so that at least two inches of each conductor are separated B Strip one half inch of insulation from the end of each conductor of the speaker wire C Attach banana plugs or twist the strands of wire together and insert them into the appropriate binding post Z VN g
9. ction LED The front panel protection LED indicates that the amplifier has been shut down because of either a fault in the wiring or a speaker or with the SI 245 itself Level Adjustment Screws The front panel level adjustment screws allow you to adjust the level of the SI 245 relative to other amplifiers in your system Use a 1 8 slotted screwdriver to adjust the screws If the SI 245 is the only amplifier in your system leave the screws at their factory default position turned fully clockwise Cleaning and Maintenance The internal parts of the SI 245 are electronic and require no maintenance Once a year it is appropriate to twist the RCA connectors on each input to remove cor rosion and improve conductivity You can clean the amplifier with soft cloth or a paper towel dampened with water or a mild detergent Do not use any spray type abrasive cleaners on the amplifier 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 SYMPTOM POSSIBLE CAUSES AND TEST PROCEDURE No sound on one channel Short circuit or loose wire at the speaker or amplifi er terminals Check that the connections are secure and that there are no loose strands of wire crossing from the positive to the negative
10. 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 245 on and off TURN ON MODE 3 30V AC DC TRIGGER es INPUT 0 CONSTANT Constant The auto turn on circuitry is off The front panel master power switch operates the amplifier In is On out is Off Audio Sense The master switch on the front panel must be in the On position The amplifier is off when there is no audio signal present at either the left or the right input but the sensing circuitry is on The turn on sensing circuitry looks for a tiny amount of audio signal present at any of the audio inputs If it detects a sig nal the amplifier is turned on Once the audio signal stops the sensing circuit waits three minutes then turns the amplifier off 3 30 Volt AC DC Opto Isolated Voltage Trigger The master switch on the front panel must be in the On position The amplifier is off when there is no 3 30V AC or DC volt age detected at the trigger input Once the sensing circuitry detects a voltage and a line level audio signal is detected at the input the amplifier is turned on Once the voltage stops the sensing circuit instantly turns the amplifier off Voltage triggers can be sup plied by Niles automated switchers some video projectors some surround sound processors or something as simple as a 16
11. lugs either at the amp or at the wall for your convenience Plug the 2 prong plug into a correctly grounded 230V 50 Hz wall outlet If you use a grounded power strip surge suppressor or extension cord verify that proper ground is maintained CAUTION Typically the preamp receiver s switched outlet is not rated for a power amplifier The SI 245 draws a maximum of approxi mately 200 watts from an AC wall outlet Use the auto turn on circuit instead Z N gt m m gt le zZ O m w gt Z 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 cir cuitry 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 Important Notes Equipment is not completely disconnected from main power source when power switch is in the OFF position Power LED The power LED indicates that the AC cord is plugged into a working AC power receptacle and that the power switch is in the On position Active LED The rear panel turn on mode switch determines when and how the amplifier will turn on The Active LED indicates that the amplifier is operating Prote
12. n adequate ventilation for proper cooling When installing the SI 245 in a cabinet be sure that the rear of the cabinet is open to fresh air to provide proper cooling see Figure 1 If the cabinet s design will not accommodate an open rear install two small boxer fans to provide continuous air flow into and out of the cabinet see Figure 2 Place the SI 245 so that there is at least 5 of free air space above the chassis If the amplifier is located on a carpeted surface place a board under the amplifier s feet Do not block the ventilation holes on the top and bottom of the SI 245 The SI 245 is equipped with an internal transformer which generates a powerful magnetic field which could induce hum in a turntable particularly a turntable equipped with a moving coil cartridge Do not place a turntable directly above or directly adjacent to the SI 245 Figure 1 Figure 2 If the cabinet rear is not open to fresh air install two small boxer fans 55cfm fan to provide continuous air flow into and out of the cabinet LLL LLL LLL LLL LL A 4 Make sure that there is a minimum of 5 of free air space above the amplifier for proper ventilation Allow a minimum of 5 of depth behind unit to accom modate cables and connectors Turn On Modes The SI 245 draws more current than a preamplifier s switched AC outlet can safe ly supply Also your preamplifier may thump at
13. ng in one room SPECIFICATIONS Design Principle Linear voltage current amplification Continuous Average Power Output 45 watts per channel RMS at 8 ohms 70 watts per channel RMS at 4 ohms n S m 2 a Q gt 2 e Z n Input Impedance 22K ohms Input Sensitivity 77V for 8Q rated output Overall Voltage Gain 28 dB Frequency Response Bandwidth Limited from 10 Hz to 100 kHz Total Harmonic Distortion 8 Ohms 05 THD from 20 Hz to 20 kHz full rated power 4 Ohms 06 THD from 20 Hz to 20 kHz full rated power Overall Dimensions 17 wide 2 5 16 high including feet 13 1 8 deep Weight 15 lbs NILESe Niles Audio Corporation www nilesaudio com 12331 S W 130 Street Miami Florida 33186 Tel 305 238 4373 Fax 305 238 0185 2005 Niles Audio Corporation All rights reserved Niles the Niles logos Systems Integration Amplifier and Blending High Fidelity and Architecture are registered trademarks of Niles Audio Corporation All other trademarks are the property of their respective owners Printed in Malaysia 06 05 DSO0284BMY
14. t m gt O zZ Line Level Audio Input Z 4 CAUTION THE AMPLIFIER MUST BE OFF WHENEVER YOU MAKE CHANGES gt TO THE INPUT CONNECTIONS gt e 1 Label all of the interconnecting Use audio patch cables with RCA phono zZ cables for the sources they connect to plugs attached to the ends 2 Connect the sources by inserting the Connect outputs from your sources to RCA plugs into the amplifier s jacks inputs on the amplifier Never connect a source or preamplifier s input e g record inputs to the inputs of your SI 245 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 patch cable The outputs are not buffered if you wish to daisy chain more than 5 Niles amplifiers you will need a Niles ADA 6 buffered distribution amplifier A single ADA 6 will allow you to daisy chain 5 amplifiers from each of its six outputs allowing 30 SI 245 power amplifiers to be fed from the same master preamplifier If your preamp has a vacuum tube output stage you must use a Niles ADA 6 to drive more than a single SI 245 AC Power Plug STEP Plug the female IEC socket of the sup plied AC cord into the IEC receptacle on the rear of the amplifier DESCRIPTION Just like a computer or printer the SI 245 has an AC cord which unp
15. terminals at the back of the amplifier and or the speaker Short circuit or a break in the speaker wire Dis connect the speaker wire at both ends separate the 2 conductors at both ends and test with a meter for a short circuit If there is no short connect the two conductors at one end and test with a meter for continuity Speaker is not working Connect the speaker to a channel that plays another speaker Audio cable to input is bad Connect another cable that is known to be good No sound on both channels Audio cable to the main inputs is bad Connect another cable that is known to be good Hum from the speakers Hum may be caused by a ground loop between two of the other components in the system To test for another ground loop try reversing the AC plugs of each of the components in the system j A O G is m N I e e Z i 2 s m TROUBLESHOOTING GUIDE continued 6 Cc SYMPTOM POSSIBLE CAUSES AND TEST PROCEDURE vs mm 2 Hum from the speakers Check for faulty cables faulty source material an 5 ungrounded phono system or a defective component fe zZ e Amp will not turn on AC power cord must be plugged into a working outlet O Master power switch must be on Cc J mm Bass sound is weak and The loudspeakers are wired out of phase Reverse the stereo image is the connections at the back of one speaker phasey or blurry soundi
16. ysically larg er than fourteen AWG SNOILVAAGISNOD NOILVTIVLSNI 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 SI 245 SYSTEMS INTEGRATION AMPLIFIER I POWER ACTIVE E PROTECT LO LEVEL ADJUST O R Aw Z gt zZ oO Aw m gt Aw az gt zZ m m Oo mm m VN 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 a speaker the Turn On circuitry wiring or with the SI 245 itself Main Inputs enable you to route a stereo Cascade Outputs of the Main Input enable line level source to the SI 245 you to daisy chain multiple amplifiers Turn On Mode switch MODEL SI 245 SPEAKERS TURN ON MODE 12V CONTROL OUT O O Andee MAIN SSF SS CASCADE IO aarm eo O INPUT OUTPUT O CONSTANT _ 3 5mm Mini Plug socket for voltage input 3 5mm Mini Plug socket for 12v DC Control output amp NILES A Z gt zZ o razl m gt 7 uw gt Z m m 1 m m i Level Adjustment screws enable you to preset the maximum system volume or match levels with another amplifier NOTE AC receptacle must be easily accessible 230 VOLTS AC 50Hz 200 WATTS
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