Niles Audio Stereo Amplifier SI 1650 User Manual

A M P L I F I E R S  
I N S T A L L A T I O N G U I D E  
SI  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
IMPORTANT SAFETY INSTRUCTIONS  
1. Read these instructions.  
2. Keep these instructions.  
3. Heed all warnings.  
19. Open flame sources, such as lighted candles,  
should NOT be placed on the apparatus.  
WARNING: To reduce the risk of fire or electric  
shock, do not expose this apparatus to rain or  
moisture.  
4. Follow all instructions.  
5. Do not use this apparatus near water.  
6. Clean only with a dry cloth.  
The lightning flash with arrowhead  
symbol, within an equilateral triangle, is  
intended to alert the user to the  
7. Do not block any ventilation openings. Install in  
accordance with the manufacturer’s instructions.  
presence of uninsulated “dangerous  
voltage” within the product’s enclosure  
that may be of sufficient magnitude to constitute a  
risk of electric shock to persons.  
8. Do not install near any heat sources such as  
radiators, heat registers, stoves or other apparatus  
(including amplifiers) that produce heat.  
The exclamation point within an  
equilateral triangle is intended to alert  
the user to the presence of important  
operating and maintenance (servicing)  
instructions in the literature accompanying the  
product.  
9. Do not defeat the safety purpose of the polarized  
or grounding-type plug. A polarized plug has two  
blades with one wider than the other. A grounding-  
type plug has two blades and a third grounding  
prong. The wide blade or the third prong is provided  
for your safety. If the provided plug does not fit into  
your outlet, consult an electrician for replacement of  
the obsolete outlet.  
FCC Required Text:  
NOTE: This equipment has been tested and found  
to comply with the limits for a Class B digital  
device, pursuant to part 15 of the FCC Rules.  
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 accordance with  
the instructions, may cause harmful interference  
to radio communications. However, there is no  
guarantee that interference will not occur in a  
particular installation. If this equipment does cause  
harmful interference to radio or television reception,  
which can be determined by turning the equipment  
off and on, the user is encouraged to try to correct  
the interference by one or more of the following  
measures:  
10. Protect the power cord from being walked on  
or pinched, particularly at plugs, convenience  
receptacles and the point where they exit from the  
apparatus.  
11. Only use attachments/accessories specified by  
the manufacturer.  
12. Use only with the cart, stand,  
tripod, bracket or table specified  
by the manufacturer or sold with  
the apparatus. When a cart is  
used, use caution when moving  
the cart/apparatus combination to  
avoid injury from tip-over.  
13. Unplug this apparatus during lightning storms or  
when unused for long periods of time.  
—Reorient or relocate the receiving antenna.  
14. Refer all servicing to qualified service personnel.  
Servicing is required when the apparatus has been  
damaged in any way, such as power supply cord or  
plug is damaged, liquid has been spilled or objects  
have fallen into the apparatus, the apparatus has  
been exposed to rain or moisture, does not operate  
normally, or has been dropped.  
—Increase the separation between the equipment  
and receiver.  
—Connect the equipment into an outlet on a  
circuit different from that to which the receiver is  
connected.  
—Consult the dealer or an experienced radio/TV  
technician for help.  
15. Do not expose this apparatus to dripping or  
splashing and ensure that no objects filled with  
liquids, such as vases, are placed on the apparatus.  
Changes or modifications not expressly approved  
by the party responsible for compliance could void  
the user’s authority to operate the equipment.  
16. To completely disconnect this apparatus from  
the AC Mains, disconnect the power supply cord  
plug from the AC receptacle.  
17. The power supply cord (sometimes referred  
to as the “Mains Plug”) is used as the disconnect  
device and shall remain accessible and operable at  
all times.  
18. Do not expose batteries to excessive heat such  
as sunshine, fire or the like.  
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INTRODUCTION  
We call the SI-1650 a Systems Integration Amplifier because it is a power  
amplifier specifically designed 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 SI-1650 Systems Integration Amplifier brings  
extremely high current power to a custom installed A/V System in a remarkably  
convenient way.  
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SI1650  
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4
16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
FEATURES AND BENEFITS  
REAL WORLD POWER  
The SI-1650 is 16-channel amplifier configurable to deliver a solid 50 watts per  
channel RMS into 8 ohms or 100 watts per channel RMS into 8 ohms using a  
special high power mode. A new digital power transformer design provides the  
energy necessary to efficiently deliver solid, deep, controlled bass response to a  
house full of speakers.  
SIXTEEN TO EIGHT CHANNEL IP CONFIGURABLE POWER  
Each of the SI-1650’s eight adjacent speaker output pairs are configurable into  
a single high power output. You can create up to eight 100 watt channels using  
the embedded webserver. This enables you to allocate more power to specific  
locations, such as large rooms, outdoor applications or subwoofers.  
FREEDOM FROM NOISE AND CROSS-TALK  
The SI-1650’s BusMatrix™ incorporates advanced PCB construction ensuring  
extremely high channel to channel isolation. Signal to noise ratios and cross-talk  
are equivalent to a professional mixing board found in a recording studio. With  
the SI-1650, the music playing in the living room cannot interfere with the music  
in the den.  
TRANSPARENT SOUND  
The audio circuitry of the SI-1650 is constructed with the finest parts available,  
including metal film resistors, high quality capacitors and oversized heat sinks.  
All this attention to technical detail results in a sound that is clear and uncolored.  
IP CONFIGURABLE BUSMATRIX™ SELECTOR  
A web based IP Configuration utility provides control of the BusMatrix™ selector  
giving you the flexibility to assign each speaker channel to any of the sixteen  
signal inputs. Adjacent signal input pairs can also be combined and assigned  
to a speaker channel for mono sound applications. With BusMatrix™, routing  
surround sound to the master bedroom, stereo to the den, mono to the powder  
room or high power to a subwoofer has never been easier. BusMatrix™ makes  
the SI-1650 an ideal multi-room or multi-zone amplifier and offers exciting new  
features and system design possibilities to the professional installer.  
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FEATURES AND BENEFITS CONTINUED...  
IP CONFIGURABLE EQ ADJUSTMENT, VOLUME LEVEL  
AND HIGH/LOW PASS SELECTION  
A web based IP Configuration utility provides independent EQ adjustment and  
volume level for each amplifier channel enabling you to EQ and set volume  
levels for 16 different speakers individually. A High/Low Pass Filter setting for  
each channel accommodates passive subwoofers and small full range speakers.  
Installers can now acoustically optimize each speaker for both its type and  
individual location using a web browser.  
TURN-ON MODES  
The SI-1650 features three turn-on modes: 1. Manual turn-on via the front  
panel switch, 2. Audio Sense and 3. External Voltage trigger. Audio Sense and  
External Voltage trigger modes enable you to configure the SI-1650 to interface  
with any kind of system and turn on automatically.  
AUTOMATIC PROTECTION  
Each channel has independent thermal and short circuit protection. In the  
unlikely event that a problem occurs on one channel, the other channels will  
continue to play. When conditions return to normal, regular operation resumes.  
STATUS DISPLAY FOR TROUBLESHOOTING  
LED’s on the front panel indicate Power, Active and Protection Status. With  
a glance at the front panel a troubleshooter is quickly provided with key  
information.  
DESIGNED AND ENGINEERED IN THE USA  
Limited two-year parts and labor warranty. (See page 42)  
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6
16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
SYSTEM DESIGN BASICS  
As shown in Figure 1, a distributed audio/video system is defined by the number  
of listening zones it has. Within a listening zone you can listen to only one  
source (e.g. CD, Radio, iPod, etc.) at any one time. A listening zone can consist  
of a single room or a group of rooms. To achieve different volumes and greater  
convenience in different rooms within a zone, individual volume controls can be  
used. Niles makes volume controls in various styles and colors. When designing  
your system, take into account who will use the system and when they will use  
it. Consult your local Niles dealer for more information.  
Figure 1  
Plasma/  
LCD  
Cable  
Box  
Blu-ray  
Player  
CD  
Player  
RECEIVER  
Family Room  
Living Room  
Listening Zone 1  
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SYSTEM DESIGN BASICS CONTINUED...  
A MultiZone system as shown in Figure 2, offers the household more flexibility.  
For instance, a family might have their family room wired for surround sound  
and their living room wired for background music. In a two zone system, the  
children can watch TV in surround sound while Mom and Dad are reading the  
paper and enjoying background music in the living room.  
Figure 2  
Plasma/  
LCD  
CD  
Player  
Blu-ray  
Player  
Cable  
Box  
RECEIVER  
RECEIVER  
Family Room  
Living Room  
Listening Zone 1  
Listening Zone 2  
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8
16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
SYSTEM DESIGN CONSIDERATIONS  
CABLE AND WIRE  
Because the SI-1650 has many connections on the rear panel (see page 32 &  
33), it is important that you correctly label all of the input cables and speaker  
wires. Label the cables and wires with their destination or source, rather than  
the SI-1650 terminal to which they are connected. This will make it easier to  
reconfigure your system in the future.  
The SI-1650 connects to your sources via shielded line level audio cables with  
RCA connectors. Use high quality cables with your Niles amplifier for the lowest  
possible noise and best overall performance. Your Niles dealer can recommend  
the proper cable.  
The SI-1650 connects to your speakers using two 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 SI-1650’s high-  
quality, gold-plated 5-way binding posts will accommodate up to 12-gauge  
wire. Attaching banana plugs to the wire will enable the connection of larger wire  
sizes.  
USING MONO FOR SMOOTHER COVERAGE  
In large or irregularly shaped rooms, you may find that the main listening area  
may be closer to one of the speakers. If the speakers in the room are connected  
to a stereo amplifier you will only hear half the music. The SI-1650’s BusMatrix™  
enables you to create mono sound from one speaker without impacting the  
stereo quality in the rest of the system. You can configure each amplifier channel  
individually to Left, Right or mono as needed with no ill effects. Some of the  
most popular areas where mono will greatly enhance the sound quality would  
be:  
• Large rooms with many seating areas and/or many pairs of speakers.  
• Irregularly shaped rooms.  
• Bathrooms with one speaker over the tub and one speaker over the sink(s).  
• Hallways or passageways (including those with multiple speakers).  
• Small rooms, such as walk-in closets where more than a single speaker is  
not required.  
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SYSTEM DESIGN CONSIDERATIONS CONTINUED...  
CREATING HIGH POWER AMPLIFIER CHANNELS FOR  
AREAS THAT REQUIRE MORE VOLUME AND POWER  
All of the odd numbered amplifier channels of the SI-1650 (channels 1, 3, 5, 7, 9,  
11, 13, and 15) include a power output of 50 or 100 watts that is selected using  
a web based IP Configuration utility. When an odd numbered amplifier channel  
is configured to100 watts, it’s even numbered adjacent amplifier channel (e.g.  
channel 1 and 2, channels 3 and 4, channels 5 and 6, etc.) is deactivated.  
There are several situations where having an SI-1650 channel with more power  
is an excellent way to improve the sound. There are also applications where  
having an SI-1650 channel with more power would seem to be appropriate but  
is not recommended.  
These are some of the most common DOs and DON’Ts:  
1. Outdoors (DO) — Sound dissipates faster outside than it does in a room  
where the walls enclose the sound and reflect it back to the listener. A pair of  
speakers playing into a large patio or yard will greatly benefit from two 100  
watt channels.  
2. Surround Sound Systems (DO) — The dynamic demands for the center  
channel are much greater than the left, right or surround channels. This is an  
excellent application for configuring a channel to the 100 watt mode.  
3. More than one pair of 8 ohm speakers (DON’T) — In large rooms or long  
hallways, often the best way to get good background music is to install  
multiple pairs of speakers. You will deliver sound much more reliably using  
two pairs of 8 ohm speakers with four 50 watt amplifier channels than you  
would using two 100 watt amplifier channels connected to two pairs of  
speakers in parallel.  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
SYSTEM DESIGN CONSIDERATIONS CONTINUED...  
SPEAKER COMPATIBILITY  
Any SI-1650 amplifier channel configured to the 50 watt mode is capable of  
driving a 4 ohm impedance speaker load. No more than two 8 ohm speakers or  
no more than one 4-6 ohm speaker can be safely connected to a single channel.  
Proper ventilation of the SI-1650 is critical when driving lower impedance loads.  
If the SI-1650 is not properly ventilated, the protection circuits may activate and  
shut off the channel at higher volume levels (for more information on proper  
amplifier placement, see Installation Considerations on page 29).  
Any odd numbered SI-1650 amplifier channel configured to the 100 watt mode  
is capable of driving an impedance load of 8 ohms. Proper ventilation of the  
SI-1650 is critical when driving an 8 ohm load with amplifier channels configured  
to 100 watts. If the SI-1650 is not properly ventilated, the protection circuits may  
activate and shut off the channel at higher volume levels (for more information  
on proper amplifier placement, see Installation Considerations on page 29).  
When designing your system, try to specify 6-8 ohm speakers (Niles offers a  
complete line of in-wall, in-ceiling, outdoor and home theater loudspeakers with  
all models rated from 6-8 ohms).  
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APPLICATIONS  
ADVANTAGES OF USING THE SI-1650 IN  
A SINGLE ZONE SYSTEM  
When you connect the preamplifier outputs of your stereo receiver or stereo  
preamplifier to the SI-1650 BusMatrix™ you dedicate a robust 50 watts to each  
speaker in your multi-room system.  
The SI-1650 has an IP Configuration and Setup tool to adjust volume and tone  
for each channel individually so you can compensate for architectural differences  
that create sonic imbalances. In addition, you can fine tune the system so that  
when all of the room volume controls are set to the loudest level, the large rooms  
and the small rooms play at the same volume.  
Figure 3  
Cable  
Box  
Blu-ray  
Player  
CD  
Player  
PRE-AMP or  
AM/FM RECEIVER  
SI-1650  
Room 1  
Room 2  
Room 3  
Room 4  
Room 5  
Room 6  
Room 7  
Room 8  
Single Zone  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
APPLICATIONS  
USING A DUAL-ZONE RECEIVER FOR TWO LISTENING ZONES  
Most of today’s Audio Video Receivers include a second zone preamplifier output  
to create a second listening zone. Using this output with the SI-1650 BusMatrix™  
input provides amplification for multiple rooms within a second listening zone as  
shown in Figure 4.  
In addition, in this example high power is supplied to the patio stereo speakers by  
configuring channel 13 for high power (left speaker) and configuring channel 15  
for high power (right speaker).  
Figure 4  
Cable  
Box  
Blu-ray  
Player  
CD  
Player  
DUAL-ZONE SURROUND  
SOUND RECEIVER  
Second Zone  
Output  
Zone 1  
(Home Theater)  
Front Speakers  
Center Speakers  
Rear Speakers  
SI-1650  
BusMatrix™  
Niles High Power  
Volume Control  
Living Room  
Kitchen  
Ofꢀce  
Family Room  
Bedroom  
Bedroom 2  
Patio  
Bridged Channels  
(13 &15 100W)  
Unbridged Channels 1-12 (50W)  
Zone 2  
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APPLICATIONS  
EXPANDING A MULTIZONE SYSTEM TO INCLUDE  
MORE ROOMS  
Many MultiZone systems incorporate multiple rooms within a single zone. The  
SI-1650 BusMatrix™ Input simplifies the connections required for this system  
design.  
As shown in Figure 5, a Niles ZR-6 MultiZone Controller has its speaker outputs  
connected directly to speakers in zones 1-5. The ZR-6’s preamp output six, set  
to a fixed output mode, is connected to the SI-1650’s BusMatrix™ inputs. The  
BusMatrix™ input signals are then routed to all the amplifier channels via the IP  
Configuration and Setup Tool. All eight rooms connect to the SI-1650 in Zone #6  
with their own room volume control for adjusting room volume levels individually.  
Figure 5  
Cable  
Box  
Blu-ray  
Player  
CD  
Player  
Zone 1 - 5  
Speaker Outputs  
F
P
M
R
9
S
3
.
1
1
2
3
4
5
6
BAND  
SET  
E
E
T
1
Niles ZR-6  
MultiZone Receiver  
Z
R
-
6
M
u
l
t
i
Z
o
n
e
R
e
c
e
i
v
e
r
Zone 6  
Preamp Output  
(set to ꢀxed)  
BusMatrix™  
Input 1 and 2  
SI-1650  
Room 1  
Room 2  
Room 3  
Room 4  
Room 5  
Room 6  
Room 7  
Room 8  
Zone 6  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
APPLICATIONS  
ADDING PREAMPS TO CREATE MORE LISTENING ZONES  
In the ultimate MultiZone system, you connect individual stereo preamplifiers (or a  
single component multi-zone/multi-source preamplifier) to the BusMatrix™ inputs  
of SI-1650. These independent input signals are then routed to the appropriate  
amplifier channels via the IP Configuration and Setup Tool creating completely  
independent listening zones.  
MultiZone systems enable listeners located in the separate zones to  
simultaneously listen to different source components as shown in Figure 6. This  
example also has the SI-1650’s High/Low Cut output feature setup to provide  
satellite speaker amplification (Low Cut from 50 watt channels 13 and 14) and  
subwoofer amplification (High Cut from 100 watt channel 15) for zone 7.  
Figure 6  
Cable  
Box  
Blu-ray  
Player  
CD  
Player  
Matrix Switching  
Preamp  
BusMatrix Inputs 1 through 16  
Zone Outputs  
SI-1650  
Bridged  
Channel 15  
Sub  
Zone 1  
Zone 2  
Zone 3  
Zone 4  
Zone 5  
Zone 6  
Zone 7  
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CONFIGURING YOUR SYSTEM  
Because the SI-1650 offers so many configuration possibilities it is important to  
plan carefully before you install it. Draw a block diagram of your system and use  
the Configuration Worksheet on page 41 to record how you plan to connect your  
SI-1650.  
Here is an example filled out.  
SAMPLE CONFIGURATION WORKSHEET - SI-1650  
Turn-On Mode  
Input Names  
Input 1 Zone 2 Left  
Input 5  
Constant  
Voltage Trigger  
Audio Sense  
X
Input 3  
Input 7  
Input 11  
Input 15  
Input 4  
Input 8  
Input 12  
Input 16  
Input 2 Zone 2 Right  
Input 6  
Input 9  
Input 10  
Input 13  
Input 14  
Channel Names and Configurations  
Channel 1 Name  
Living Room Left  
Low Pass o High Pass o  
Power: n 50W o 100W Loudness o On n Off  
Living Room Right  
Signal Route Zone 2 Left  
Room EQ Large  
Room EQ Large  
Room EQ Small  
Room EQ Small  
Room EQ Small  
Room EQ Small  
Room EQ Flat  
Room EQ Flat  
Room EQ Flat  
Room EQ Flat  
Room EQ Flat  
Room EQ Flat  
Room EQ Outdoor  
Channel 2 Name  
Low Pass o High Pass o  
Low Pass o High Pass o  
Low Pass o High Pass o  
Low Pass o High Pass o  
Low Pass o High Pass o  
Low Pass o High Pass o  
Low Pass o High Pass o  
Low Pass o High Pass o  
Low Pass o High Pass o  
Low Pass o High Pass o  
Low Pass o High Pass o  
Low Pass o High Pass o  
Power: n 50W o 100W Loudness o On n Off  
Kitchen Left  
Signal Route Zone 2 Right  
Channel 3 Name  
Power: n 50W o 100W Loudness o On n Off  
Kitchen Right  
Signal Route Zone 2 Left  
Channel 4 Name  
Power: n 50W o 100W Loudness o On n Off  
Office Left  
Signal Route Zone 2 Right  
Channel 5 Name  
Power: n 50W o 100W Loudness o On n Off  
Office Right  
Signal Route Zone 2 Left  
Channel 6 Name  
Power: n 50W o 100W Loudness o On n Off  
Bedroom Left  
Signal Route Zone 2 Right  
Channel 7 Name  
Power: n 50W o 100W Loudness o On n Off  
Bedroom Right  
Signal Route Zone 2 Left  
Channel 8 Name  
Power: n 50W o 100W Loudness o On n Off  
Room 5 Left  
Signal Route Zone 2 Right  
Channel 9 Name  
Power: n 50W o 100W Loudness o On n Off  
Room 5 Right  
Signal Route Zone 2 Left  
Channel 10 Name  
Power: n 50W o 100W Loudness o On n Off  
Room 6 Left  
Signal Route Zone 2 Right  
Channel 11 Name  
Power: n 50W o 100W Loudness o On n Off  
Room 6 Right  
Signal Route Zone 2 Left  
Channel 12 Name  
Power: n 50W o 100W Loudness o On n Off  
Patio Left  
Signal Route Zone 2 Right  
Channel 13 Name  
Power: o 50W n 100W Loudness o On n Off  
Signal Route Zone 2 Left  
Channel 14 Name  
Signal Route  
Low Pass o High Pass o Room EQ  
Power: o 50W o 100W Loudness o On n Off  
Patio Right  
Channel 15 Name  
Low Pass o High Pass o  
Power: o 50W n 100W Loudness o On n Off  
Signal Route Zone 2 Right  
Channel 16 Name  
Signal Route  
Room EQ Outdoor  
Low Pass o High Pass o Room EQ  
Power: o 50W o 100W Loudness o On n Off  
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16  
16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
CONFIGURING YOUR SYSTEM  
The SI-1650 includes a Configuration and Setup Tool that provides easy access  
to the all essential features of the amplifier using the web browser on a laptop,  
PC, iPad , tablet or smartphone (e.g. IE, Firefox, Chrome, Safari, etc.).  
CONNECTING FOR CONFIGURATION  
A direct wired Ethernet connection or a local area network connection to the RJ-  
45 network connector on the rear panel of the SI-1650 is necessary to access the  
SI-1650 Configuration and Setup Tool using a web browser.  
DIRECT ETHERNET CONNECTION  
A direct Ethernet connection is made by connecting the RJ-45 network connector  
of a PC directly to the RJ-45 network connector on the rear panel of the SI-1650.  
Use the numbered steps below to establish network communication between a  
PC and the SI-1650 when using a direct wired Ethernet connection.  
Note: A crossover network cable is not required when using a direct wired  
Ethernet connection as the SI-1650’s network connector is auto sensing.  
Windows XP  
1. Select Windows Control Panel > Network Connections.  
2. Right click Local Area Network and select properties.  
3. Highlight Internet Protocol (TCP/IP) in the connections list and  
then select properties.  
4. Set a unique IP address compatible with the factory default IP address  
5. Set Subnet to 255.255.255.0  
Windows 7  
1. Select Windows Control Panel > Network and Internet > Network and Sharing  
Center.  
2. Select Change Adapter Settings.  
3. Right click Local Area Connection and select Properties.  
4. Highlight Internet Protocol Version 4 (TCP/IPv4) in the connections list  
and then select Properties.  
5. Set a unique IP address compatible with the factory default IP address  
6. Set Subnet to 255.255.255.0  
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CONFIGURING YOUR SYSTEM  
LOCAL AREA NETWORK CONNECTION  
The network IP address of the SI-1650 (both the factory default address and any  
address set manually using the Configuration and Setup Tool) is static and must  
be a unique IP address compatible with the local area network it is connecting to.  
Use the following steps to establish network communication between a PC, iPad  
or Tablet and the SI-1650 when using a local area network connection.  
1. Use a Windows PC and a Direct Ethernet Connection, as described above, to  
initially establish communication with the SI-1650.  
2. Use the Network Settings Main Selection instructions located in the on the next  
page of this manual to set an IP address compatible with the local area network.  
3. Connect the RJ-45 network connector on the rear panel of SI-1650 to the local  
area network router or Ethernet Switch.  
If you plan on connecting multiple SI-1650’s to a network, connect them one at  
a time changing each amplifier’s IP address to a unique address compatible with  
your network.  
Warning: Never allow two or more SI-1650’s to connect to the same network with the  
same IP address.  
Note: If necessary, the MAC ID is located on the bottom rear of the unit.  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
CONFIGURATION AND SETUP TOOL  
Open the Configuration and Setup Tool Using a Web Browser. Once a direct  
Ethernet or local area network connection is made, use the web browser included  
with your laptop, PC, iPad, tablet or smartphone to log into the web server in the  
SI-1650. Enter the current IP address of the SI-1650 into the URL line of your web  
browser.  
The factory default IP address of the SI-1650 is http://192.168.1.1  
Note: This may be the same for another product on your network. Make sure there are no conflicts.  
The Network Settings main selection is displayed when the web interface is first  
opened.  
NETWORK SETTINGS MAIN SELECTION  
Choose the Network Settings main selection and the Network Settings page is  
displayed. The current IP address and subnet mask of the SI-1650 are displayed.  
Both the IP address and the subnet mask can be changed and saved to the  
amplifier’s memory by selecting the save option.  
Note: Changing the IP address is only recommended when connecting to a local  
area network. A recessed reset button located on the back of the SI-1650 restores  
the IP address, network settings and amplifier configuration back to factory  
default.  
FIGURE 8  
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CONFIGURATION AND SETUP TOOL  
AMPLIFIER CONFIGURATION MAIN SELECTION  
Choose the Amplifier Configuration main selection and the Input/Channel Names  
sub selection page is displayed. The Channel Power, Turn On Mode and Signal  
Routing sub selections are also displayed for selection and configuration.  
AMPLIFIER CONFIGURATION MAIN SELECTION –  
INPUT/CHANNEL NAMES SUB SELECTION  
Editable Input and Channel name fields are displayed for all 16 inputs and all 16  
channel outputs.  
Note: Even numbered channels are listed inactive if their adjacent odd numbered  
channel is set to 100 watts (e.g. when channel 15 is set to 100 watts, channel 16  
is listed as inactive).  
1. Select a name field.  
2. Enter the input source name, room name or zone name.  
3. Select Save to save the names to the amplifier’s memory.  
FIGURE 9  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
CONFIGURATION AND SETUP TOOL  
AMPLIFIER CONFIGURATION MAIN SELECTION –  
CHANNEL POWER SUB SELECTION  
Choose the Channel Power sub selection and the Channel Power page is  
displayed. All odd numbered amplifier channels are configurable to output  
either 50 watts or 100 watts. Odd channels are listed along with two checkbox  
columns. The first checkbox column is named 100 watts and the second is  
named 50 watts.  
Note: If an odd numbered channel is set to 100 watts, that channels adjacent  
even number channel is listed inactive (e.g. when channel 15 set to 100 watts,  
channel is 16 listed as inactive).  
1. Select either 100 watts or 50 watts for each of the odd numbered channels.  
2. Select Save to save the Channel Power settings to the amplifier’s memory.  
Default Setting: 50W (All channels on)  
FIGURE 10  
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CONFIGURATION AND SETUP TOOL  
AMPLIFIER CONFIGURATION MAIN SELECTION –  
TURN ON MODE SUB SELECTION  
Choose the Turn On Mode sub selection and the Turn On Mode page is  
displayed. Refer to page 28 for more details on the three available turn on  
modes.  
1. Select one of three available check boxes that corresponds to the Turn On  
Mode you wish to use, Audio Sense, Voltage Trigger or Constant On.  
2. Select Save to save the Turn On Mode to the amplifier’s memory.  
Default Setting: Constant On  
FIGURE 11  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
CONFIGURATION AND SETUP TOOL  
AMPLIFIER CONFIGURATION MAIN SELECTION –  
SIGNAL ROUTING SUB SELECTION  
Choose the Signal Routing sub selection and the Signal Routing page is  
displayed. All 16 amplifier channels are listed on the left with their names and  
currently selected input shown to the right.  
Note: Even numbered channels are listed inactive if their adjacent odd  
numbered channel is set to 100 watts (e.g. when channel 15 set to 100 watts,  
channel is 16 listed as inactive).  
1. Use the pull down list of available inputs to assign a different input signal to  
any channel. All available inputs and possible input combinations are included  
in the pull down list along with their names (e.g. inputs 1 through 16, inputs  
1+2, inputs 3+4, inputs 5+6, etc.).  
2. Select Save to save Signal Routing to the amplifier’s memory.  
FIGURE 12  
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CONFIGURATION AND SETUP TOOL  
EQUALIZATION MAIN SELECTION  
Choose the Equalization main selection and the Manual EQ Presets page is  
displayed. The Room EQ sub selection is also displayed for selection and  
configuration.  
EQUALIZATION MAIN SELECTION –  
ROOM EQ PRESETS  
Choose the Room EQ Presets sub-selection and the Room EQ Presets page  
is displayed. All 16 channels are listed with their names and currently selected  
Room EQ Preset shown to the left.  
Note: Even numbered channels are listed inactive if their adjacent odd  
numbered channel is set to 100 watts (e.g. when channel 15 set to 100 watts,  
channel is 16 listed as inactive).  
1. Use the pull down list of available Room EQ Presets to assign a different  
preset to any channel (Flat, Small, Large or Outdoor).  
2. Select Save to save Room EQ Presets to the amplifier’s memory.  
FIGURE 13  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
CONFIGURATION AND SETUP TOOL  
EQUALIZATION MAIN SELECTION –  
MANUAL EQ SELECTION  
Choose the Manual EQ sub-selection and the Manual EQ page is displayed. The  
amplifier channels are included in a single pull down list along with their names.  
Note: If an odd numbered channel is set to 100 watts, it even numbered  
adjacent channel will not be included in the pull down list (e.g. when channel 15  
set to 100 watts, channel 16 will not be included in the pull down list).  
1. Choose a channel from the pull down list to adjust its EQ parameters. The  
current Room EQ Preset is displayed for the selected channel. If any manual  
adjustments are made and saved, the room preset display changes to  
“None”.  
2. Select or deselect Loudness, Low Cut or High Cut and use the individual  
arrow buttons to adjust volume, bass, midrange, treble, midrange center  
frequency and midrange bandwidth for the selected channel.  
3. Copy EQ Settings saves all manual EQ parameters for the selected channel  
to a clipboard including loudness, low cut, high cut, volume, bass, midrange,  
treble, midrange center frequency and midrange bandwidth.  
4. Paste EQ Settings applies the saved clipboard settings to any other selected  
channel.  
5. Set Flat sets the selected channel to the default Flat Room EQ Preset and  
volume at 0dB.  
6. Select Save to save  
Manual EQ settings to the  
amplifier’s memory.  
FIGURE 14  
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CONFIGURATION AND SETUP TOOL  
UTILITIES MAIN SELECTION  
Choose the Utilities Main Selection and the Project Information page is  
displayed. The Generate Report, Create Backup File and Restore From File sub  
selections are also displayed for selection and use.  
UTILITIES MAIN SELECTION –  
PROJECT INFORMATION SUB SELECTION  
Choose the Project Information sub selection and the Project Information page  
is displayed. Editable project information includes dealer name, customer name,  
installer name, installation date and comments.  
1. Place the cursor in a data field and enter new information using the keyboard  
2. Select Save to save the Project Information edits to the amplifier’s memory.  
Note: Name and date fields are 20 characters maximum. Comments field is 110 characters maximum.  
FIGURE 16  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
CONFIGURATION AND SETUP TOOL  
UTILITIES MAIN SELECTION –  
GENERATE REPORT SUB SELECTION  
Choose the Generate Report sub selection and the Generate Report page is  
displayed.  
1. Select Generate Report to Screen to generate a complete configuration report  
to a new browser window.  
2. Select Generate Report to File to save the report to a htm file. Use the Save  
As window to browse for a location for the Report.htm file. Enter a unique  
name and select Save.  
UTILITIES MAIN SELECTION – CREATE BACKUP FILE  
SUB SELECTION  
Select this option to create a backup SI-1650 configuration file with all the  
current settings of the SI-1650 you are connected to. Click Save then use  
the Save As window to browse for a location for the configuration file, enter a  
unique name and select Save.  
UTILITIES MAIN SELECTION – RESTORE FROM FILE  
SUB SELECTION  
Select this option to restore a previously saved configuration file back into a  
connected SI-1650. Click Browse and use the “Choose file to upload” window  
to browse for the configuration file and select Open. Click Upload to finish  
the operation. The selected backup SI-1650 configuration file will replace the  
current configuration in the SI-1650.FIGURE 17  
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INSTALLATION CONSIDERATIONS  
TURN-ON MODES  
Automating the turn-on of your SI-1650 is one of the easiest steps when  
installing it in a distributed system. However, do not plug the main power  
cord into the switched AC outlet of your preamplifier or receiver. The high  
power design of the SI-1650 requires large amounts of current from its AC  
power source. Additionally, it is always recommended to activate the system  
preamplifier/receiver before turning on your SI-1650 in order to prevent system  
“turn-on thumps”.  
In order to address these important needs, the SI-1650 has three special turn-  
on modes that let you turn the amplifier on only when it is needed. Use the  
Configuration and Setup Tool to access and select one of these three Turn-On  
options.  
Important! The Front Panel Power Switch must be in the ON (switch in)  
position for any of the three turn-on options to function (refer to page 36  
for more information concerning the Front Panel Power Switch).  
FIGURE 18  
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 any of the  
audio inputs, 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, all the amplifier channels will turn on. Once the audio signal stops, the  
sensing circuit waits three minutes, then turns all amplifier channels off.  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
INSTALLATION CONSIDERATIONS  
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 amplifier is turned on. Once the Trigger  
voltage is turned off, the sensing circuit instantly turns the amplifier off. The  
amplifier 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 filter capacitor will delay the turn-off of the amplifier. Trigger  
sources must be 3-24VAC or DC, 20mA or greater.  
If the cabinet rear is not open to  
fresh air, install two small “boxer  
fans” to provide continuos air flow  
into and out of the cabinet  
Make sure that there is a minimum of 5” of free air  
space above the amplifier and 3” on each side for  
proper ventilation.  
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 flow into and out of the  
cabinet.  
Allow a minimum of 2” of depth behind unit  
to accommodate cables and connectors.  
FIGURE 19  
FIGURE 20  
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INSTALLATION CONSIDERATIONS  
PLACEMENT  
Place the SI-1650 on a flat, level surface like a table or shelf. It should be placed  
upright so that its weight rests on the unit’s four 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.  
The SI-1650, like any hi-fi component, will last much longer if it is given  
adequate ventilation for proper cooling. When installing the SI-1650 in a cabinet,  
be sure that the rear of the cabinet is open to fresh air to provide proper cooling  
(see Figure 19). 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 20). Place the SI-1650 so that there is at least 5” of free air  
space above the chassis and 3” of space on each side. 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-1650.  
The SI-1650 is equipped with a power transformer. This transformer 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-1650.  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
INSTALLATION  
BUS MATRIX™ LINE LEVEL AUDIO INPUTS  
CAUTION! THE AMPLIFIER MUST BE OFF WHENEVER YOU MAKE CHANGES TO THE  
INPUT CONNECTIONS.  
STEP  
DESCRIPTION  
1. Label all of the interconnecting cables for the sources  
they connect to.  
Use audio patch cables with RCA phono plugs  
attached to the ends.  
Connect outputs from your sources to inputs on  
the amplifier. Never connect a source or  
preamplifier’s input (e.g., record inputs) to the  
inputs of your SI-1650.  
2. Connect the sources by inserting the RCA  
plug into the amplifier’s jacks.  
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 AVDA-3 buffered distribution amplifier. If your preamp has  
a vacuum tube output stage, you must use a Niles AVDA-3 to drive more than a  
single SI-1650.  
STEP  
DESCRIPTION  
1. Plug the female IEC socket of the supplied AC power  
cord (the supplied power cord is designed for 120V AC  
wall outlets), or use an appropriate IEC AC power cord  
to match the electrical wall outlet you are using (e.g.  
240V AC), into the IEC receptacle on the rear of the  
amplifier. Replace the fuse in the bay below the power  
cord inlet with one of the 10A fuses provided if using a  
220-240V outlet.  
If you use a grounded power strip, surge  
suppressor or extension cord, verify that proper  
ground is maintained.  
The SI-1650 draws a maximum of approximately  
1600 watts from an AC wall outlet. This is much  
more than the typical accessory outlet on the back  
of a component will provide. Use the SI-1650’s  
auto turn on circuitry to turn on the SI-1650  
whenever the preamp is on.  
CAUTION! Do not plug the amplifier’s cord into a  
preamplifier’s convenience outlets.  
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Front panel “Master Power”  
switch turns off the entire  
amplifier, including the  
Turn-On circuitry  
Power LED illuminates to  
confirm the amplifier is  
connected to a live AC power  
outlet and that the master  
power switch is on.  
Factory Default  
Reset Switch  
3.5 mm Jack for  
3-24V AC/DC Trigger Output  
TRIGGER  
INPUT  
IN  
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
RESET  
OUT  
8
8
LINE OUT  
SPEAKER OUT  
1
2
3
4
5
6
7
Minimum impedance:  
8
(50W mode)  
4
(100W mode)  
CLASS 2 WIRING  
Banana binding posts for  
speaker connections  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
Bicolor Status LEDs, one for  
each of the sixteen channels,  
illuminate “green” when the  
amplifier circuitry has been turned  
on by the Turn-On circuits, and  
illuminates “red” to indicate  
activation of the amplifier’s built-in  
protection circuitry  
Removable feet for  
rack mounting  
Bus Matrix™ Input Gold  
Plated RCA Jacks  
Cascade Audio Output  
Gold Plated RCA Jacks  
RJ-45 Ethernet  
TCP/IP Connection  
INPUT  
®
S I - 1 6 5 0  
S
y
s
t
e
m
s
I
n
t
e
g
r
a
t
i
o
n
A
m
p
l
i
f
i
e
r
9
10  
10  
11  
11  
12  
13  
14  
14  
15  
15  
16  
16  
Niles Audio, Carlsbad, California, USA  
Designed and Engineered in the USA. Made in China.  
9
9
12  
13  
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 operation.  
Serial No.  
LINE OUT  
This Class digital apparatus  
B
complies with Canadian  
ICES-003.  
SPEAKER OUT  
Cet appareil numérique de la  
classe  
B
est conforme la  
à
10  
11  
12  
13  
14  
15  
16  
100-120 / 220-240 V~  
50 / 60 Hz, 1000W  
norme NMB-003 du Canada.  
CAUTION: replace only with  
same type and rating of fuse.  
Fuse: 100-120V: T15AL, 250V  
220-240V: T10AL, 250V  
ATTENTION: remplacer  
uniquement avec le même  
type et calibre du fusible.  
CLASS 2 WIRING  
Removable 2-prong  
16 gauge 6’ AC power cord.  
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INSTALLATION  
SPEAKER WIRE CONNECTIONS  
CAUTION! ALL SPEAKER WIRE CONNECTIONS MUST BE MADE WITH THE AMPLIFIER OFF.  
Banana Plugs  
There are many types of  
banana plugs, some crimp,  
Bare Wire  
some solder. The Niles  
gold banana plug has 3  
quick-connect binding  
posts for the bare wire  
on the body of the plug.  
A banana plug is simply  
inserted into the jack at  
the end of the amplifier’s  
binding post.  
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  
If you label the wires for their destination, rather than which  
terminal of the SI-1650 they are connected to, it will be easier  
to reconfigure your system in the future.  
1. Label all wires.  
A. Split the speaker wire insulation so that at least two inches  
of each conductor are separated.  
2. Connect one stripped wire end or banana  
plug to the black terminal and one to the  
red terminal. CAUTION- Avoid having even a  
single strand of wire touching the chassis or  
another connector.  
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.  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
INSTALLATION  
THE CONTROL OUTPUT  
This terminal provides a 12V DC signal  
suitable for triggering Niles automated  
switchers, some motorized screens, some  
electric curtain controls, etc. This voltage is  
present only when the amplifier is active or on.  
When the amplifier turns off, the 12V signal is  
off.  
STEP  
DESCRIPTION  
1. Check the requirements of the device you want  
to control.  
The control output has a maximum current  
capability of 150 mA.  
2. Connect the 3.5 mm Jack to the control output  
maintaining proper polarity  
(tip = +).  
Niles makes an accessory cable plug  
FG00724.  
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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.  
BICOLOR STATUS LED  
The bicolor Status LEDs illuminate “green” when the amplifier circuitry for the  
respective channel has been turned on by the Turn-On circuits, and illuminates  
“red” to indicate activation of the amplifier channel’s built-in protection circuitry  
due to either a fault in the wiring or the speaker, or with the Niles System  
Integration Amplifier® itself.  
USING LEVEL CONTROLS AS LIMITERS  
If your system is remote controlled, or if you think that some of the users like  
to play the stereo too loudly, you can choose to calibrate the system so that it  
is limited to a volume level you assign. The SI-1650 allows you to set different  
volume levels for different rooms. Calibrate your system volume levels with the  
steps outlined below:  
1. Lower all of the SI-1650 level controls to the minimum volume position. If there are  
any other amplifiers in the system, lower their level controls to the minimum (all of the  
amplifiers in your system must have level controls).  
2. Raise all of the individual in-wall volume controls to the loudest setting.  
3. Play a loud radio station with the tuner set to Mono.  
4. Raise the volume of your preamplifier or receiver slowly– if you hear any sound, lower  
the volume again and recheck all of your amplifier levels, they must be at minimum. If  
no sound is heard, proceed to step five.  
5. Have someone step into each room and listen as you adjust each level control to the  
desired maximum level for that room. Adjust the balance between speakers for the  
most common listening position in each room.  
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16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
OPERATION  
LISTENING AT HIGHER VOLUMES  
Fifty watts is enough power to play a conventional speaker in a normal sized  
room loudly enough to completely drown out conversation. Even at levels like  
that, the SI-1650 will sound clear and clean. However, it requires more power  
to achieve a reasonable volume of sound in a large room than it does in a small  
room. It is possible (even if you are not a teenager) to turn the volume so high  
that the amplifier runs out of power. This creates “clipping” distortion.  
Clipping distortion makes treble sound very harsh and unmusical. When you  
hear harsh sounding treble from any good speaker, turn the volume down  
immediately! Those harsh sounds are masking some much more powerful  
high frequency sound spikes which will quickly damage the tweeter of any  
loudspeaker.  
If you continue to operate the amplifier at “clipping” power levels the protection  
circuits will operate when the amplifier overheats. The protection circuits reset  
when the amplifier’s internal circuitry cools. Reduce the volume to prevent a  
reoccurrence. Perpetually overdriving your speakers and amplifier is abuse and  
probably voids the manufacturer’s warranty of all affected products.  
CLEANING AND MAINTENANCE  
The internal parts of the SI-1650 are electronic and require no maintenance.  
Once a year it is appropriate to twist the RCA connectors on each input to  
remove any oxidation and improve conductivity.  
You can clean only with dry cloth. Do not use any spray-type, abrasive cleaners  
on the amplifier.  
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TROUBLE-SHOOTING 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 call Niles Technical  
Support at 1-800-289-4434. The most common problems relate to hook up. Have  
your configuration worksheet handy when you call.  
Symptom  
Possible Causes and Test Procedure  
Short circuit or loose wire at speaker or amplifier terminals. Check that connections are secure  
and that there are no loose strands of wire crossing from the positive to the negative terminal  
at the back of the amplifier and the speaker.  
Short circuit or a break in the speaker wire. Disconnect 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.  
No sound on one  
channel  
Speaker is not working. Connect the speaker to a channel that plays another speaker. Audio  
cable to dedicated input is bad. Connect the non-working channel input to another cable that is  
known to be good.  
Adjacent channel set to High Power Mode. Check your configuration worksheet for the correct  
setting and verify. The thermal protection circuit has operated because of overheating caused  
by overdriving or inadequate ventilation. Check front panel status LEDs.  
Check your configuration worksheet and verify all settings.  
No sound on some or  
all channels  
Audio cable to the inputs is bad. Connect the nonworking channel input to another cable that is  
known to be good. Some or all of the internal amplifier fuses are blown. (Return the amplifier to  
your dealer for service).  
Hum may be caused by a ground loop between two components in the system. Test for a  
ground loop by reversing the AC plugs of any components in the system with non polarized AC  
plugs.  
Hum from all the  
speakers  
Check for faulty cables, faulty source material, an ungrounded phono system, cable TV feed or  
a defective component.  
Master power switch must be on.  
AC power cord must be plugged into a working outlet.  
Amp will not turn on  
Test that the AC power receptacle is working. If the outlet tests O.K., the internal fuses are  
blown. Return the amplifier to your dealer for service.  
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38  
16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
TROUBLE-SHOOTING GUIDE  
Symptom  
Possible Causes and Test Procedure  
Sound is distorted  
on one or all of the  
channels at normal  
volumes  
Check your configuration worksheet and verify all settings.  
Normal volume cannot  
be reached  
One of the internal amplifier fuses is blown. (Return the amplifier to your dealer for service).  
Check that the bridging switch is “Off”. If two adjacent channels are connected normally but  
the bridging switch is set to the “Bridged” position, the two speakers will play out of phase  
with each other.  
Bass sound is weak  
and the stereo image is  
“phasey” sounding in  
one room  
The loudspeakers are wired out of phase. Reverse the connections at the back of one speaker.  
BY PHONE (IN USA)  
1-800-BUY-HIFI (289-4434)  
BY PHONE (OUTSIDE USA)  
1-760-710-0992  
CUSTOMER SERVICE HOURS  
8:00 AM to 5:30 PM PT  
TECHNICAL SUPPORT HOURS  
6:00 AM to 4:00 PM PT  
ON THE WEB  
www.nilesaudio.com  
EMAIL TECHNICAL SUPPORT  
EMAIL FOR PRODUCT SUGGESTIONS  
NILES AUDIO CORPORATION – 1-800-BUY-HIFI – 1-760-710-0992  
39  
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SPECIFICATIONS  
Detail  
SI-1650  
Digital, high current bridgeable multi-channel amplifier  
Design Principle  
Continuous  
Average Power  
Output  
50 watts RMS per channel into 8 Ohms ,  
100 watts RMS per channel into 4 Ohms  
Continuous  
Average Power  
Output Bridged  
100 watts RMS per channel into 8 Ohms  
Frequency  
Response  
Bandwidth Limited from 5Hz to 25kHz  
20Hz to 20kHz un-weighted > 102 dB  
@ 1kHz <0.06% THD + N  
Signal to Noise  
Ratio  
Total Harmonic  
Distortion  
Channel  
Separation  
@ 1kHz >70dB  
438.1 mm (17 ¼“) wide  
144.7 (5 ¾”) high (including feet)  
411.1mm (16 ¼“) deep  
Overall  
Dimensions  
Weight 26.2 lb., 11.9 kg  
Weight  
100-120 / 220-240 V~, 50 / 60 Hz  
AC Mains:  
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40  
16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
CONFIGURATION WORKSHEET  
For ease of use, the Configuration Worksheet can be enlarged on a photocopier.  
CONFIGURATION WORKSHEET - SI-1650  
Turn-On Mode  
Input Names  
Input 1  
Constant  
Audio Sense  
Voltage Trigger  
Input 2  
Input 6  
Input 10  
Input 14  
Input 3  
Input 7  
Input 11  
Input 15  
Input 4  
Input 8  
Input 12  
Input 16  
Input 5  
Input 9  
Input 13  
Channel Names and Configurations  
Channel 1 Name  
Signal Route  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Room EQ  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Loudness o On o Off Low Pass o High Pass o  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Power: o 50W o 100W  
Channel 2 Name  
Signal Route  
Channel 3 Name  
Signal Route  
Channel 4 Name  
Signal Route  
Channel 5 Name  
Signal Route  
Channel 6 Name  
Signal Route  
Channel 7 Name  
Signal Route  
Channel 8 Name  
Signal Route  
Channel 9 Name  
Signal Route  
Channel 10 Name  
Signal Route  
Channel 11 Name  
Signal Route  
Channel 12 Name  
Signal Route  
Channel 13 Name  
Signal Route  
Channel 14 Name  
Signal Route  
Channel 15 Name  
Signal Route  
Channel 16 Name  
NILES AUDIO CORPORATION – 1-800-BUY-HIFI – 1-760-710-0992  
41  
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LIMITED WARRANTY  
Niles Audio Corporation (“NILES”) warrants to the original retail purchaser only that this product will be free of manufacturing defects  
in material and workmanship for the following periods and subject to the limitations and exclusions set forth below:  
Lifetime Warranty  
All Passive Amplifier Products (those not requiring AC or battery power).  
Ten years from the date of purchase  
All Other Passive Products (those not requiring AC or battery power).  
Two years from the date of purchase  
All Active Products (those requiring AC or battery power).  
This warranty is not transferable to subsequent purchasers of the product. To obtain warranty service, contact the authorized dealer  
where you purchased your product or take the unit to the nearest authorized NILES dealer (with proof of purchase – claims made  
without proof of purchase will be denied) who will test the product and if necessary, forward it to NILES for service. If there are no  
authorized NILES dealers in your area, you must contact NILES to receive a factory Return Authorization Number. DO NOT RETURN  
ANY UNIT WITHOUT FIRST RECEIVING WRITTEN AUTHORIZATION AND SHIPPING INSTRUCTIONS FROM NILES.  
Upon examination, NILES will, at its sole option and expense, repair or replace any product found to be defective. NILES will return  
the repaired or replaced unit to you via its usual shipping method from the factory to your address in the United States of America or  
Canada only. Any shipping costs for addresses outside of the United States or Canada shall be the responsibility of the purchaser.  
In the event that this model is no longer available and cannot be repaired effectively, NILES, at its sole option, may replace it with  
a different model of equal or greater value, or refund the original purchase price paid. THE FOREGOING ARE YOUR EXCLUSIVE  
REMEDIES FOR BREACH OF WARRANTY.  
This Warranty does not include service or parts to repair damage caused by improper use or handling, including but not limited to  
damage caused by accident, mishandling, improper installation, commercial use, abuse, negligence, or any defect caused by repair  
to the product by anyone other than NILES.  
This warranty does not cover reimbursement for your costs of removing and transporting the product for warranty service  
evaluation, or installation of any replacement product provided under this warranty.  
This Warranty will be void if:  
• the Serial Number on the product has been removed, tampered with or defaced.  
• the product was not purchased from an authorized dealer or reseller.  
THE FOREGOING WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESSED AND IMPLIED WARRANTIES.  
NILES EXPRESSLY DISCLAIMS ALL SUCH OTHER WARRANTIES, INCLUDING BUT NOT LIMITED TO IMPLIED  
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT, WITH RESPECT  
TO THE PRODUCT. TO THE MAXIMUM EXTENT PERMITTED BY LAW, NILES SHALL NOT BE RESPONSIBLE FOR ANY  
INCIDENTAL OR CONSEQUENTIAL DAMAGES EXCEPT TO THE EXTENT PROVIDED (OR PROHIBITED) BY APPLICABLE  
LAW, EVEN IF NILES HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.  
Notwithstanding the above, if you qualify as a “consumer” under the Magnuson-Moss Warranty Act, or applicable state laws, then  
you may be entitled to any implied warranties allowed by law for the Warranty Period. Further, some states do not allow limitations  
on how long an implied warranty lasts or allow the exclusion or limitation of consequential damages, so such limitations may not  
apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.  
For the name of your nearest authorized NILES dealer, contact: CORE Brands LLC, 1690 Corporate Circle, Petaluma, California  
94954, or call 1-760-710-0992. Please be advised that NILES only sells its products via the Internet through a select group of  
unauthorized Internet dealers are not covered by the NILES warranty and may be either:  
1) goods acquired on a secondary or grey market  
2) counterfeit or stolen goods  
3) damaged, or defective goods  
Please fill in your product information and retain for your records.  
Model ______________________ Serial No. _____________________________________________ Purchase Date ______________  
ATTENTION: TO OUR VALUED CONSUMERS:  
To insure that consumers obtain quality pre-sale and after-sale support and service, NILES products are sold exclusively through  
authorized dealers. This warranty is VOID if the products have been purchased from an unauthorized dealer.  
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42  
16 CHANNEL, FULLY CONFIGURABLE POWER AMPLIFIERS  
NOTES  
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NILES AUDIO CORPORATION – 1-800-BUY-HIFI – 1-760-710-0992  
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1 6 9 0 C o r p o r a t e C i r c l e , P e t a l u m a , C A 9 4 9 5 4  
1 - 7 6 0 - 7 1 0 - 0 9 9 2  
1 - 8 0 0 - B U Y - H I F I  
w w w . n i l e s a u d i o . c o m  
©2013 The CORE Brands, LLC. All rights reserved. Niles and the Niles logos are registered  
trademarks of CORE Brands, LLC. All other trademarks are the property of their respective  
owners. We reserve the right to change specifications, descriptions and prices without notice.  
The technical and other information contained herein is not intended to set forth all technical  
and other specifications. Designed and engineered in the USA. 9901255 Rev A  
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