Page 1
Level
IS-HUB4
STEWART
Input
AUDIO
Port 1
Port 2
Output
Port 3
Port 4
Power
24VDC
Sig On
Input
IntraSound System
Owner’s Manual
February 2012
www.stewartaudio.com
Page 2
Important Safety Instructions
Before using your Stewart Audio Inc. Power Amplier, please read this
Owner’s Manual carefully to ensure optimum trouble-free performance.
WARNING: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT EX-
POSE THIS AMPLIFIER TO RAIN OR MOISTURE. DANGEROUS HIGH
VOLTAGES ARE PRESENT INSIDE THE ENCLOSURE. DO NOT OPEN THE
CABINET. REFER SERVICING TO QUALIFIED PERSONNEL ONLY.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK). NO USERSERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
The lighting bolt within arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of un-insulated “dangerous voltage” within
the product’s enclosure that may be of sufcient magnitude to constitute a risk of electrical shock to person.
The exclamation point within an equilateral triangle, is
intended to alert the user to the presence of important
operating and maintenance (servicing) instruction in the
literature accompanying the appliance.
1. Read these instructions. All of the safety and operating procedures should be read before the amplier is installed or operated.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
5. Do not use this apparatus near water. For example, near a bathtub,
in a wet basement, near a swimming pool, etc. This amplier is
intended to be operated in a controlled indoor environment.
6. Clean only with dry cloth. Do not use solvents or abrasive cleaners.
Never pour any liquid on the amplier.
7. Installation should be performed by a trained and licensed professional to insure safe and lasting operation.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including ampliers) that produce
heat.
9. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit
from the apparatus.
10. Unplug this apparatus during lightning storms or when unused for
long periods of time.
11. Only use attachments/accessories specied by the manufacturer.
12. Refer all servicing to qualied 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.
13. The 24 Volt DC power supply that is supplied with the IntraSound
System may be connected to 120 to 240 VAC, 50-60 Hertz. Do not
defeat the ground polarization of the power plug.
2. Keep these instructions. Retain these documents for future reference.
3. Heed all warnings. All warnings on the amplier and in these operating instructions should be adhered to.
4. Follow all instructions
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Table of Contents
Important Safety Instructions ······························································ 2
Table of Contents ················································································ 4
1 Welcome ························································································· 5
2 System Overview ········································································· 6
3 System Installation ······································································· 8
4 Operation ······················································································ 12
5 Troubleshooting ·········································································· 14
6 Technical Specications ····························································· 15
7 Warranty Statement ·································································· 16
8 Accessories ················································································· 16
1 Welcome
Congratulations on the purchase of your new Stewart Audio IntraSound
System. If after reading this manual you should have any questions
concerning amplier installation and operation, please contact your Authorized Stewart Dealer, or you may contact us directly using the contact information provided on the back of this manual.
1.1 Features
Your Stewart Audio IntraSound System is the result of years of
experience in the design and manufacture of quality ampliers. As such
it provides a combination of performance and operational benets that
simply cannot be found in conventional ampliers.
Distributes audio and power over Cat5 cables
Compact hub and subcompact nodes
Nodes have selectable wattage and channels
Efcient Class D microamplier inside every node
Clean full–range dynamic power
Signal Sense Technology for Energy Star Compliance
Easy to install distributed audio solution
External inline power supply
1.2 Using this Manual
In order to obtain maximum performance from your IntraSound System, please take time to read this brief owner’s manual and carefully
follow the guidelines for connection and operation.
This manual provides you with the information necessary to safely install and operate your new IntraSound System in the most common
scenarios. If you nd yourself requiring additional assistance, please
feel free to contact your Authorized Dealer, or you may contact us directly using the information provided on the back of this manual.
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2 System Overview
The IntraSound System by Stewart Audio consists of two key components: the IS-HUB4 and the IS-AmpNode-10. Other components
such as Cat5 cable and speakers play a role in the system but will not
be the focus of this manual.
2.1 System Components & Dimensions
7.25in
18.4cm
2.2 Example System Setup
Level
Sig On
IS-HUB4
Gain
Channel
Switches
1 2 3 4 5 6
gain channel
Input
2.65in
6.75cm
Watts
Amp
Output
Nodes
Max.
STEWART
Input
AUDIO
Port 1
Hub Front
1.5in
3.8cm
Hub Side
2.5in
6.4cm
Port 2
Output
1.5in
3.8cm
Port 3
2.65in
6.75cm
1
23456
Node Side
Port 4
Power
24VDC
1.0in
2.5cm
1.5in
3.8cm
Node Top
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3 System Installation
CAUTION: Before installing your system, make sure that
you have read the Important Safety Precautions at the beginning of this manual.
3.1. Hub Installation
Stewart Audio recommends that the unit is secured in some fashion to
prevent movement of the unit if one of the cables is pulled during installation of an amplier node.
3.1.1 Input Connections
The IS-HUB4 accepts an unbalanced stereo input using either RCA or
3.5mm plugs. The standard wiring is shown below.
+/Left
+
Ground
(Shield)
+/Left
Right
Left
Ground
-/Right
(Shield)
Ground
(Shield)
-/Right
+/Right
Shield
+/Left
3.1.2 Output Connections
The IS-HUB4 utilizes standard Cat-5 (or Cat-5e) cable to send both signal and power to the nodes connected to its ports. Regular Cat-5 patch
cables may be used, purchased in standard lengths or cut and crimped
for the installation. If making your own cables, standard A or B patch
cable wiring can be used or straight through connections between pin
1-8 to pin 1-8 on either end. Crossover cables or wiring cannot be
used.
Each port is capable of outputting a maximum of 20 total watts of power to the nodes daisy chained on that port.
CAUTION: Do not connect the Hub or Amp Nodes to any
other devices (such as a network router or switch). They
are not internet capable and will damage other devices.
The total power output of the IS-HUB4 is limited by the power rating of
the power supply which was purchased with the system and cannot
exceed 80 Watts.
Each IS-Hub4 port is capable of outputting a maximum of 20 watts of
speaker power. This 20 watts is available for the IS-AmpNode-10/
speakers daisy chained to the port.
If you would like to upgrade the chosen power supply, please contact
your local sales rep for details.
3.2 Node Installation
The IS-AmpNode-10 contains a single channel micro amplier capable
of delivering up to 10 watts of power to a single speaker.
If you have purchased the IS-SP4 speakers as a part of your IntraSound
system, the amplier can be secured into the top of the speaker. To
secure the amplier node, place the node on top of the speaker inserting the screws on the top of the speaker into the notches on the rear
of the amplier. Twist the node clockwise and it will lock into place.
To secure the amplier node to another type of speaker, Stewart Audio
recommends industrial strength Velcro for easily installation.
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3.2.1 Node Input Connections
The IntraSound system utilizies Cat5 to send power as well as a stereo
signal to each node on the line. For the initial connection between the
IS-HUB4 and an IS-AmpNode-10, a Cat5 cable should connect any port
on the hub with either the left or right port of the node. The remaining
port of the node can be used to daisy chain it to another node
Caution: Do not connect the nal node in a line back to the
IS-HUB4. Doing so may damage the hub.
3.2.2 Amplier Node Conguration
The Amp nodes are congured on a node-per-node basis using the DIP
switches located on the front of the node. This can be done with a
small screwdriver or other tool that will t into the recessed switches.
The conguration options are found printed on the top of the amplier
or below
Gain
Watts
Max.
Nodes
Channel
Switches
Amp
Output
1 2 3 4 5 6
gain channel
1
23456
In this example, the node is set to 10W and Mono L+R
Gain Conguration
The gain level on the micro amplier nodes is adjustable from 0.3W to
10W using the DIP switches on the front of the unit. Using the table
printed on the top of the node or provided for you on the left, adjust the
rst 2 DIP switches to the desired setting.
Note: Each port from the hub is capable of supplying 20W
each. This means that the higher the gain setting, the fewer units you can daisy chain. Refer to the table below.
Selected Wattage # of Units/Port
10W 2
4.5W 4
1.0W 15*
*Number reduced to account for power loss over cable
0.3W 50*
Channel Conguration
When the signal is sent down the Cat5 cable from the hub to the
nodes, both the left and right channels are sent. This means that each
amplier node can be congured to output the left channel, right channel, or a mono summation. The last 4 switches of the DIP switch are
for selecting the channel.
Refer to the image in section 3.2.2 or the silkscreen of the amplier
node for switch congurations.
Note: Each port from the hub is capable of supplying 20W
each. This means that the higher the gain setting, the fewer units you can daisy chain. Refer to the table below.
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4 Operation
4.1 Operating Precautions
1. Before use, your amplier must be congured for proper operation,
including input and output wiring hookup. Improper wiring can result in damage to equipment or potentially harm to the operator.
Consult section 3 for setup instructions.
2. Tampering with the circuitry, or making unauthorized changes is
not only dangerous but may also violate local regulations.
3. Use care when making connections between the amplier and the
input or output equipment. Using equipment that is not capable of
handling the output wattage may lead to permanent damage.
NOTE: Stewart Audio will not be held responsible for
damage to your IntraSound System or connected equipment if the instructions in this manual are not followed.
4.2 Indicators and Controls
4.2.1 Indicators and Controls on IS-HUB4
The IS-HUB4 accepts all inputs and power and sends it down Cat5 cable to the amplier nodes. All power and system volume can be controlled on the IS-HUB4.
Two LED indicators on the left-hand side of the IS-HUB4 will illuminate
when power is supplied (Power LED - blue) and when signal is detected on either input (Sig LED - green). If the nodes are not outputting any
audio, rst check to make sure that both of these LEDs are illuminated.
Note - When the IS-HUB4 goes into sleep mode due to no signal,
the LED will turn OFF. To turn the IS-HUB4 back on, make sure
that signal is being sent to the IS-HUB4.
The system volume can be set using the recessed knob on the lefthand side of the unit. To turn this, insert a small screwdriver into the
slot and turn clockwise to turn the volume up.
4.2.2 Indicators and Controls on IS-AmpNode-10
The IS-AmpNode-10 has an amber LED on the top of the node which
will illuminate when power is supplied to the node from the hub.
Note - When the IS-HUB4 is in sleep mode, the amber LED indicators on the top of the amplier nodes will turn off.
To control the wattage of the amplier, refer to section 3.2.2.
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5 Troubleshooting
6 Technical Specications
Problem: Hub’s Power indicator does not turn on.
Procedure: Check that the hub is plugged into a live outlet. After you
have ensured that it is not a power issue, check that you have a hot
signal going into the inputs. If a signal is not detected, the hub will go
into a sleep mode after 5 minutes to comply with Energy Star.
Problem: Amplier Node’s power indicator does not turn on.
Procedure: First check to make sure that the power indicator is lit on
the hub, if not then see the corresponding Troubleshooting entry. If this
does not resolve the issue, then double-check the Cat5 cable going
from the hub to the amplier node. Replace this cable if possible. If this
is not the issue, then ensure that you are not stringing too many nodes
on a line. Refer to section 3.2.2 for more information on this.
Problem: Amplier Node is outputting no audio.
Procedure: First check that the signal indicator on the hub is lit and the
volume control is at a reasonable level on the hub. Next, to rule out a
cabling issue, check that the power indicator is lit on the amplier
node. If this does not resolve the issue then refer to section 3.2.2 to
ensure that the DIP switches are correctly congured on the node. If all
of the channel selection switches are in the “up” position, then this is
most likely the issue. Refer to section 3.2.2for the proper settings.
Problem: Amplier Node is outputting weak audio
Procedure: First check the Level knob on the hub to make sure it is at
a reasonable level. Next, check the DIP switches on the front of the
amplier node to see what the gain is set at. If both switches are in the
“up” position and you still have a weak output, check to make sure
that you are not stringing too many nodes on a line. Refer to section
3.2.2 for more information on this.
Maximum Output 20Hz - 20kHz
Output per node 10W @ 8Ω
Hub’s Total Output Wattage of power supply
Frequency Response (+0, -3 dB) 20Hz-20kHz
THD+N <0.1% at 1W
Signal to noise ratio >100dB
Standard Voltage Gain Adjustable 20-36dB
Input Impedance (Unbalanced) 9-60kΩ (Depending on gain)
Sleep, Idle (No Nodes) 0.005/0.016A
Class D
Input Connectors 3.5mm Stereo, Dual RCA
Output Connectors RJ-45 (Hub), Bare wire (Node)
Power Supply External In-Line 24VDC
Cooling Convection-Cooling
Controls Master Volume (Hub), Gain
and Channel Select (Node)
LED Indicators Power & Signal Present
Construction Aluminum Chassis (Hub), ABS
Plastic (Node)
Dimensions
Height 1.25in (3.2cm)
Width 4.35in (11.1cm)
Depth 3.2in (8.1cm)
Weight 0.37bs (0.16kg)
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7 Warranty Information
6.1 Warranty Summary
All Stewart Audio ampliers and accessories, unless excluded in this
summary, are covered by a 3-year limited warranty on parts and labor
from the date of purchase. In order to be eligible for warranty repairs,
the ampliers and accessories must have been purchased through an
authorized Stewart Audio dealer and submitted by the original purchaser. This warranty is only valid in the country in which the amplier was
purchased.
7.1.1 Eligibility Requirements.
Stewart Audio warrants against all malfunctions which come as a result
of component or manufacturer defect. The amplier is also covered
from all failures which arise during the warranty period (3 years from
date of purchase) that are not a result of misuse. The following actions
will void your warranty:
The power cord or AC plug has been damaged through misuse.
The amplier has been exposed to moisture or extreme tempera-
tures.
The amplier has been dropped, items have been dropped on the
amplier, or the enclosure has been damaged.
The amplier has been opened by the operator.
The amplier was improperly packaged when sending to the fac-
tory for repair, resulting in damage.
Any of the precautions or instructions found in this manual were
not followed.
Damages resulting to the amplier which are not covered under this
warranty can be factory-repaired at cost to the customer. Use the contact information below to initiate the repair process.
7.2 Return Procedure
This section includes the return procedures which must be followed in
order to prevent processing delay or cost to the customer. Please read
the entire section before contacting Stewart Audio for returns.
7.2.1 Return Authorization Number
All returns to the factory for service must be accompanied by a Return
Authorization (RA) number. One can be obtained by contacting Stewart
Audio at (209) 588-8111 or via e-mail at support@stewartaudio.com.
NOTE: Any defective products received without an RA number
will be returned to sender at their expense.
If Stewart Audio is unable to contact the sender in 14 days, the merchandise will be considered scrap and may be disposed of.
7.2.2 Shipment Instructions
If Stewart Audio requests that you ship the defective product back to
their service center, please refer to the guide below. To ensure prompt
warranty service, be sure to follow all instructions.
1. Return Authorization (RA) is required for product being sent to the
factory for service.
2. See packing instructions in section 7.2.3.
3. Ship the defective product using a method which provides for order tracking or order conrmation. The service center is located at
the following address:
Stewart Audio
14397 Cuesta Court Suite D1
Sonora, CA 95370
4. Use a bold black marker and write the RA number on three sides
of the box.
5. Record the RMA number for future reference. The RA number can
be used to check the repair status.
7.2.3 Packaging Instructions
Should Stewart Audio request that you ship your product to their service center, these instructions must be followed in order to ensure safe
delivery. If they are not followed, Stewart Audio assumes no responsibility for damaged goods and/or accessories that are sent with your
unit.
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7.2.3 Packaging Instructions (cont.)
1. Please write the RA number on three sides of the box. Include the
Stewart Audio RA number inside the box and a brief description of
the problem.
2. Do not ship any accessories (manuals, cords, hardware, etc.) with
your unit. These items are not needed to service your product.
Stewart Audio will not be held responsible for these items if they
are returned with the ampliers.
3. When shipping your amplier, it is important that it has adequate
protection. We recommend you use the original packing material
when returning the product for repair. If you do not have the original box, see number 4.
4. If you provide your own shipping pack, the minimum recommended requirements for materials are as follows:
a. 275 P.S.I. burst test, Double-Wall carton that allows for 2-
inch solid Styrofoam on all six sides of unit or 3 inches of
plastic bubble wrap on all six sides of unit.
b. Securely seal the package with an adequate carton sealing
tape.
c. Do not use light boxes or “peanuts”.
NOTE: Damage caused by poor packaging will not be covered
under warranty.
7.2.4 Estimate Approval
An estimate for all non-warranty repairs will be provided to the customer once the unit has been shipped to the factory. The customer is responsible to approve this estimate within 7 days. If the repairs are not
approved within 14 days, Stewart Audio reserves the right to consider
the unit scrap and may discard it.
7.2.5 Payment of Non-Warranty Repairs
Payment for non-warranty repairs must be submitted to Stewart Audio
before the product will be returned to the customer.
8 Accessories
At the time of this printing, the IntraSound
System accessories were still under
development
To view the IntraSound System accessories or
to see the full Stewart Audio product lineup,
visit us at:
www.stewartaudio.com
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