Niles Audio SI-2150, SI-250, SI-2100 User Manual
AMPLIFIERS
INSTALLATION GUIDE
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CONGRATULATIONS!
Thank you for purchasing a Niles Systems Integration Amplier®, one of the most
exible and convenient ampliers ever offered. Like all Niles products, your new
amplier 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
Introduction 4
Features and benefits 5
Installation Considerations 7
Front and rear panel details 11
Installation 13
Operation 17
Troubleshooting guide 18
Specifications 20
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2 Channel, BridgaBle Power amPlifiers
ImpORTANT SAFETy INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions .
5. Do not use this apparatus near water.
6. Clean o nly with a dry cloth.
7. Do not block any ventilation openings. Ins tall in
accordance with the manufacturer’s instructions.
8. Do not install ne ar any heat sources such as
radiato rs, hea t registers, stoves or other apparatus
(including ampliers) that produce heat.
9. Do not defeat the safety purpose of the polar ized
or groun ding-t ype plug. A polar ized plug has two
blades with one wider than the other. A groundingtype pl ug has two blades a nd a third g rounding
prong. T he wide bl ade or the third prong is provi ded
for your safety. If the provided p lug does not t into
your outl et, consult an electrician for replace ment of
the obsolete outlet.
10. Protect the power cord from be ing walked on
or pinch ed, par ticularly at plugs, convenience
receptacles a nd the point where they exit fr om the
apparatus.
11. Only us e attachments/accessories specied by
the manufacturer.
12. Use only with the car t, stan d,
tripod, bracket or table specied
by the manu factur er or sold with
the appa ratus. W hen a car t is
used, use caution when moving
the cart/apparatus combination to
avoid inju ry from tip-over.
13. Unplug this appar atus dur ing lightning storms or
when unu sed for long periods of tim e.
14. Refer all se rvicing to qualied service perso nnel.
Servicing is require d when the appara tus has been
damaged in any way, such a s power supply cord or
plug is da maged, liquid ha s been spilled or object s
have falle n into the apparatus, the apparatus has
been exposed to rain or moisture, does not operate
normally, or has been dropped.
15. Do not expose this apparatus to drippi ng or
splashing and ensure that no objects lle d with
liquids, such as vases, are place d on the apparatus.
16. To completely disconnect this apparatus from
the AC Mains, disco nnect the power supply cord
plug fro m the AC receptacle.
17. The power supply co rd (sometimes referred
to as the “Mains Plug”) is used as the disconnect
device and shall remain ac cessible and operable at
all times.
18. Do not expose batte ries to excessive heat such
as sunshine, re or the like.
19. Open ame source s, such as lighted candle s,
should N OT be placed on the ap paratus.
WARNIN G: To redu ce the risk of fi re or elect ric
shock, do not expos e this apparatu s to rai n or
moisture.
The lightning ash with arrowhead
symbol, w ithin an e quilate ral triangle, is
intende d to aler t the user to the
presence of uninsulated “dangerous
voltage” within the produc t’s enclosure
that may be of sufcient magnitude to consti tute a
risk of electric shock to person s.
The exclamation point within an
equilateral triangle is intended to aler t
the user to the presence of im port ant
operating and maintenance (servicing)
instructions in the literature accompanying the
product.
FCC Required Text:
NOTE: This equipment has been tested and found
to comply with the limits for a Class B digital
device, p ursua nt to par t 15 of the FCC Rule s.
These limits are designed to provide reasonable
protection against harmful interference in a
residential installation. This equipment generates,
uses, and can radiate, radio frequency energy
and, if not installed and used in accordan ce with
the instructions, may cause harmful interference
to radio communications. However, there is no
guarantee that interference will not occur in a
particular install ation. If this equipment do es caus e
harmful inter ference to radio o r televis ion reception,
which ca n be determined by turning the equipment
off and o n, the use r is encouraged to try to co rrect
the inter ference by one or more of the following
measures:
—Reorient or relocate the receiving antenna.
—Increa se the separation betwe en the equipment
and receiver.
—Connect the equipment into an outlet on a
circuit different fro m that to which the rec eiver is
connected.
—Consult the dealer or an experie nced radio/TV
technician for help.
Changes or modications not expressly approved
by the par ty res ponsible for compliance could void
the user’s authori ty to operate the equipment.
NILES AUDIO CORPORATION – 1-800-BUY-HIFI – 1-760-710-0992
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INTROdUCTION
The Niles SI-250, the Niles SI-2100 and the Niles SI-2150 are members of the
award-winning Niles Systems Integration Amplier
for home theaters and whole house audio systems requiring high power.
The Niles System Integration Amplier family is specically created 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, and background music. The Niles Systems
Integration Amplier family brings extremely high current power to a custom
installed A/V System in a remarkably convenient way.
This guide contains information for the proper use of the Niles SI-250 (50 watts
x 2), the Niles SI-2100 (100 watts x 2) and the Niles SI-2150 (150 watts x 2)
System Integration Ampliers
BRIdGABLE pOwER AmpLIFIERS
®
.
®
family. They are designed
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WWW.NILESAUDIO.COM
2 Channel, BridgaBle Power amPlifiers
FEATURES ANd BENEFITS
REAL wORLd pOwER
The SI-250, the SI-2100 and the SI-2150 deliver 50 watts, 100 watts, and 150
watts per channel at 8 ohms and 100 watts, 220 watts, 270 watts per channel at
4 ohms respectively. You’ll get tremendous bass and dynamics from every pair
of speakers connected.
TRANSpARENT SOUNd
The audio circuitry of the Niles System Integration Ampliers® is constructed
using the nest parts available; including 1% metal lm 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 Niles System Integration Amplier is powered via its
own independent power supply. This increases the isolation between the two
channels and eliminates cross talk, guaranteeing you absolute silence as the
backdrop to your music.
CURRENT FOR REACTIvE LOAdS
The high current design of the Niles System Integration Ampliers assures that
even unusual and reactive loads are handled with ease. A massive toroidal
transformer (SI-250) and cutting edge digital power supplies (SI-2100, SI-2150)
provide more than ample current to your system.
FREEdOm FROm FAN NOISE
The oversized heat sinks inside the System Integration Ampliers allow the
amplier circuitry to stay cool even when operating into low impedance loads
without the distracting noise created when using fan-cooled ampliers.
INdEpENdENT LEvEL CONTROLS
Each amplier channel features an independent level control enabling precise
volume matching to the rest of the system. These level controls can also limit
volume to prevent abuse of the system.
NILES AUDIO CORPORATION – 1-800-BUY-HIFI – 1-760-710-0992
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FEATURES ANd BENEFITS
LIFETImE CONNECTIONS
The Niles System Integration Amplier® family features gold plated stereo
inputs, cascade stereo outputs, and ve way binding posts to ensure perfect
connections without corrosion for years to come.
TURN-ON mOdES
The Niles System Integration Amplier® family features three turn-on modes:
1. Music Sense, 2. External Voltage Trigger, 3. Manual Turn-On via the front
panel switch. You can congure a Niles Systems Integration Amplier
®
to
interface with any kind of system and have the unit automatically turn on.
AUTOmATIC pROTECTION
The Niles System Integration Amplier® family is equipped with sophisticated
protection circuits. In the unlikely event that a problem occurs, the amplier
shuts itself off. When conditions return to normal, regular operation resumes.
STATUS dISpLAy FOR TROUBLEShOOTING
LED indicators 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 information!
CONTROL OUTpUT
A 12 Volt DC output is provided whenever the amplier is on, allowing you to
operate voltage triggered devices like motorized screens and curtains.
BRIdGEd mOdE
The Niles System Integration Amplier® family can be operated in a bridged mono
conguration. In this conguration, the SI-250, the SI-2100 and the SI-2150
deliver 225 watts, 400 watts, and 550 watts respectively. Bridged mode is perfect
for subwoofer, rock speakers or any applications requiring high power output.
COmpACT 1U dESIGN
The SI-250, the SI-2100 and the SI-2150 all share the same compact low prole
design requiring only a single rack space (1U).
dESIGNEd ANd ENGINEEREd IN ThE USA
Limited two-year parts and labor warranty.
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WWW.NILESAUDIO.COM
2 Channel, BridgaBle Power amPlifiers
INSTALLATION CONSIdERATIONS
pLACEmENT
Place the Niles System Integration Amplier® on a at 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 amplier on the rear or front panel for even an
instant will result in damage to the amplier’s connectors and controls.
The Niles System Integration Amplier
®
, like any hi- component, will last much
longer if it is given adequate ventilation for proper cooling. When installing
the Niles System Integration Amplier
®
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 ow into and out of the cabinet (see Figure 2).
Place the Niles System Integration Amplier
®
so that there is at least 7” of free
air space above the chassis. If the amplier is located on a carpeted surface,
place a board under the amplier’s feet. Do not block the ventilation holes on
the top and bottom of the Niles System Integration Amplier
®
.
CAUTION! When using low impedance speaker loads (less than 8 ohms Normal
Mode) refer to Figure 2 for proper placement.
Figure 1
Make sure that there is a minimum of 7” of free air
space above the amplier for proper ventilation.
Boxer Fan (55 CFM)
directly centered 7”
on top of the Amplifer.
Figure 2
Boxer Fan (55 CFM)
directly centered 2”
behind the Amplier.
If the cabinet rear is not open to fresh air or if you’re
using low impedance loads, install two “boxer fans”
to provide continuous air ow into and out of the
Allow a minimum of 2” of depth behind unit
to accommodate cables and connectors.
cabinet.
NILES AUDIO CORPORATION – 1-800-BUY-HIFI – 1-760-710-0992
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INSTALLATION CONSIdERATIONS
BRIDGED
LEFT RIGHT
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesired
TURN-ON mOdES
The Niles System Integration Amplier® draws more current than a preamplier’s
switched AC outlet can safely supply. Also, your preamplier may “thump” at
dangerous volumes if the amplier is already on when the preamp turns on. It is
usually best to turn the amplier on only when it is needed. The Turn-On Mode
selector switch gives you three options for turning the amplier on and off. Audio
sense is the factory default setting.
Systems
Integration
Amplif ier
TURN ON MODE
AUDIO SENSE
CONSTANT
®
3-30V
AC/DC
TRIGGER
INPUT
12V
CONTROL
OUT
LEVELS
L R
FOR
BRIDGED
MODE
MAIN BUS
L
R
INPUT
BUS
OUTPUT
L
operation.
R
STEREO
CONSTANT - The auto turn-on circuitry is off. The front panel master power
switch operates the amplier. In is “On”, out is “Off”.
AUDIO SENSE - The master switch on the front panel must be in the “On”
position. The amplier 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 signal, the amplier is turned on. Once the audio signal stops, the
sensing circuit waits two minutes, then turns the amplier off.
3-24 VOLT AC/DC OPTO-ISOLATED VOLTAGE TRIGGER - The Power switch
on the front panel must be in the “On” position for the voltage trigger to function.
When a Trigger Plug is inserted into the rear panel connector and the sensing
circuitry detects a voltage, the amplier is turned on. Once the Trigger voltage is
turned off, the sensing circuit instantly turns the amplier off. The amplier is off
when there is no 3-24V AC or DC voltage detected at the trigger input. Voltage
triggers can be supplied by Niles automated switchers, some video projectors,
some surround sound processors, or something as simple as a 12 volt AC wall
adapter plugged into the switched outlet of your stereo receiver. Linear DC wall
adapters are not recommended; the long discharge time of the DC adapter’s lter
capacitor will delay the turn-off of the amplier. Trigger sources must be 3-24VAC
or DC, 20mA or greater.
INSTALLATION CONSIdERATIONS
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