Dolby Laboratories DSR1090 User manual
Dolby DSR1090
Owner's Manual
16 October 2022
Issue 1 Part number: 8800304
Notices
Copyright
© 2022 Dolby Laboratories. All rights reserved.
Dolby Laboratories, Inc.
1275 Market Street
San Francisco, CA 94103-1410 USA
Telephone 415-558-0200
Fax 415-645-4000
http://www.dolby.com
Trademarks
Dolby and the double-D symbol are registered trademarks of Dolby Laboratories.
The following are trademarks of Dolby Laboratories:
Dialogue Intelligence™
Dolby®
Dolby Advanced Audio™
Dolby Atmos®
Dolby Audio™
Dolby Cinema®
Dolby Digital Plus™
Dolby Digital Plus Advanced Audio™
Dolby Digital Plus Home Theater™
Dolby Home Theater®
Dolby Theatre®
Dolby Vision®
Dolby Vision IQ™
Dolby Voice®
Feel Every Dimension™
Feel Every Dimension in Dolby™
Feel Every Dimension in Dolby Atmos™
MLP Lossless™
Pro Logic®
Surround EX™
All other trademarks remain the property of their respective owners.
Product model
THIS DOCUMENTATION APPLIES TO THE DOLBY DSR1090 SPEAKER (MODEL: CID1028).
Limited warranty and warranty exclusions
THE LIMITED WARRANTY AND WARRANTY EXCLUSIONS MAY BE FOUND AT THE FOLLOWING URL: https://
www.dolby.com/us/en/about/warranty-and-maintenance-policies.html
Notices
Dolby DSR1090 Owner's Manual 2
Issue 1 Part number: 8800304 16 October 2022
Contents
1 Important safety and regulatory information............................................................................................4
2 Introduction to the Dolby DSR1090 Speaker..............................................................................................7
2.1 About this documentation....................................................................................................................8
2.2 DSR1090 key features and benefits...................................................................................................... 8
2.3 DSR1090 preinstallation information .................................................................................................. 8
2.3.1 Placing the DSR1090 on a wall or ceiling........................................................................................9
2.3.2 Determining horizontal aiming for side and rear speakers .......................................................... 9
2.3.3 Determining vertical aiming for side and rear speakers ...............................................................10
2.3.4 Determining the top surround position......................................................................................... 10
2.4 Selecting the DSR1090 bracket and yoke.............................................................................................11
2.5 Selecting the wire for the DSR1090...................................................................................................... 11
2.6 DSR1090 design simulations.................................................................................................................12
2.7 Additional information..........................................................................................................................12
2.8 Contacting Dolby .................................................................................................................................. 12
3 Assembling and installing the DSR1090..................................................................................................... 14
3.1 Installing a bracket................................................................................................................................ 15
3.2 Installing a yoke.....................................................................................................................................16
3.3 Aiming the DSR1090.............................................................................................................................. 17
3.3.1 Using a laser for horizontal aiming.................................................................................................17
3.3.2 Using a laser for vertical aiming......................................................................................................17
3.4 Installing the safety cable..................................................................................................................... 18
3.5 Connecting and configuring the DSR1090............................................................................................19
4 Dolby DSR1090 specifications.....................................................................................................................21
4.1 Dolby DSR1090 specifications...............................................................................................................22
4.2 Dolby DSR1090 dimensions.................................................................................................................. 23
5 Dolby DSR1090 digital signal processing requirements............................................................................ 24
5.1 Dolby DSR1090 digital signal processing requirements...................................................................... 25
6 System limiters............................................................................................................................................ 26
6.1 Setting system limiters..........................................................................................................................27
7 Documentation revision history................................................................................................................. 29
Contents
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1
Important safety and regulatory information
Safety
INSTALLER ASSUMES ALL RESPONSIBILITY AND LIABILITY FOR THE INSTALLATION OF
THIS PRODUCT.
No information contained in this guide is intended as a warranty on the part of Dolby.
Anyone using this information assumes all liability arising from its use. Product
abuse, use of the product not in accordance with Dolby instructions, or use in an
application for which the product has not been designed is not covered under any
Dolby warranty, nor is Dolby liable for any loss or damage.
Installation must be performed by qualified, licensed, and insured installers, and in
accordance with all laws, rules, and regulations applicable to the installation site.
Failure to do so could result in serious personal injury or even death. Prior to
installing this product, read and completely understand the installation instructions.
You must read these instructions to prevent personal injury and property damage.
Keep the installation instructions in an easily accessible location for future reference.
A licensed professional engineer must approve the placement and method of
attachment to the building structure prior to the installation of the system.
All information presented herein is based upon materials and practices common to
North America and may not directly apply to other countries because of diering
material dimensions, specifications, and/or local regulations. Installers in other
countries should consult with appropriate engineering and regulatory authorities for
specific guidelines.
Any supplied rigging hardware is intended only for use with the specified speaker(s).
The installer assumes all risk of loss and/or injury arising out of the use of the
supplied rigging hardware with any other speaker. All other rigging is considered part
of the venue and/or installer-supplied equipment and is not addressed in this guide.
This guide is not a comprehensive source for rigging in general. Installer assumes all
responsibility for ensuring that accepted rigging and safety practices are employed.
Installer assumes all responsibility for the appropriate use of Dolby supplied rigging
hardware and follows at a minimum all applicable laws, rules, and regulations in
force for each venue.
No open flame sources should be placed on or near the apparatus. Do not install near
any heat sources such as radiators, heat registers, stoves, or other apparatus that
produce heat.
Storage temperature: -4 to +140°F (-20 to +60°C). The products covered by this
manual are not intended for use in high-moisture environments. Moisture can
damage the product and cause corrosion of electrical contacts and metal parts. Avoid
exposing the speakers to direct moisture. Keep speakers out of extended or intense
direct sunlight. Premature product failure or serious personal injury could occur if
this product is used outdoors or in wet indoor environments.
Important safety and regulatory information
Dolby DSR1090 Owner's Manual 4
Issue 1 Part number: 8800304 16 October 2022
Dolby is not responsible for the application of its products for any purpose or the
misuse of this information for any purpose. Furthermore, Dolby is not responsible for
the abuse of its products caused by avoiding compliance with inspection and
maintenance procedures or any other abuse.
This product is intended for indoor use only.
Do not block any ventilation openings. Install in accordance with the instructions as
detailed in this manual and the Product Information document.
When a rolling cart is used to transport the speaker, use caution when moving the
cart/speaker system to avoid injury.
Refer all servicing to qualified service personnel. Servicing is required when the
apparatus has been damaged in any way.
This product may require installation in a restricted access location. Please refer to
this manual and to the Product Information document.
Caution: Hearing damage can occur by prolonged exposure to
excessive sound pressure level (SPL); the speaker is easily
capable of generating SPL suicient to cause permanent
hearing damage to performers, production crew, or audience
members. Caution should be taken to avoid prolonged
exposure to SPL in excess of 90 dB.
Caution: Vibration from this type of speaker system may
cause cabinets to shi. Failure to secure the speaker cabinet
to the building structure may result in the speaker system
tipping or falling, which may cause damage or injury.
Caution: Make sure that no water pipes, natural gas lines,
electrical wire, or conduit are present where the speaker is to
be installed. Cutting or drilling into water pipes, natural gas
lines, electrical wire, or conduit could cause serious personal
injury or property damage.
Caution: Use proper liing techniques when working with
heavy objects to avoid personal injury.
High temperature warning: The speaker system may reach
elevated temperatures during operation. Always remove all
drive signals and allow ample time for the system to cool
down prior to handling.
To reduce electric shock, do not expose the apparatus to dripping or splashing; no
objects filled with liquids, such as mugs, shall be placed on the apparatus.
Caution: Troubleshooting must be performed by a trained
electrician. To reduce the risk of electric shock, do not attempt
to service this equipment unless you are qualified to do so.
Dolby DSR1090 Owner's Manual 5
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SAFETY SYMBOL KEY
Caution: This symbol that appears on the unit and/or instruction manual is intended to
alert the user to the presence of important safety operating and maintenance
instructions.
Warning:
This symbol that appears on the unit and/or instruction manual is intended to alert the user to the
presence of uninsulated "dangerous" voltage within the product enclosure that may be of suicient
magnitude to constitute a risk of electric shock to persons.
High temperature warning:
This symbol that appears on the unit and/or the instruction manual is intended to alert the user that
the item can be hot and that care must be taken accordingly.
EU environmental regulations/compliance and product disposal information
Restriction of Hazardous Substances Directive (RoHS): All Dolby products comply with the
requirements of the EU RoHS Directive. This product is electronic equipment and should be disposed
of in accordance with all applicable laws.
Do not dispose as household waste. Do not dispose of the product in a fire. Please dispose of this
product by taking it to your local electronic waste collection point or recycling center. For information
regarding where to recycle electronic equipment, contact your local dealer. For additional information
regarding Waste Electrical and Electronic Equipment (WEEE) and product disposal go to http://
www.dolby.com/us/en/about/environmental-commitment.html.
EAC RoHs requirements
This product complies with EAC RoHS requirements.
Important safety and regulatory information
Dolby DSR1090 Owner's Manual 6
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2
Introduction to the Dolby DSR1090 Speaker
The DSR1090 is a high-performance cinema surround speaker for use in 5.1 and Dolby Surround 7.1
cinema auditoriums, as well as small to medium-sized Dolby Atmos equipped auditoriums. The
DSR1090 provides a 90° horizontal ✕ 60° vertical acoustic coverage pattern, which works well for
general-purpose surround applications and can be used for sidewall or overhead installations.
The DSR1090 utilizes a high-performance 10-inch low-frequency driver and a 1-inch exit high-
frequency compression driver. Both transducers are finite element modeling (FEM) optimized, which
allows the transducers to deliver high-sound pressure levels with minimal distortion. These advanced
drivers, coupled with the Dolby industry-leading system design and support philosophy, allow for
exceptional performance, and quick, easy installation and service.
Figure 1: Dolby DSR1090
Following is an outline of this chapter:
•About this documentation
•DSR1090 key features and benefits
•DSR1090 preinstallation information
•Selecting the DSR1090 bracket and yoke
•Selecting the wire for the DSR1090
•DSR1090 design simulations
•Additional information
•Contacting Dolby
Introduction to the Dolby DSR1090 Speaker
Dolby DSR1090 Owner's Manual 7
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2.1 About this documentation
This documentation describes the key features and benefits of the Dolby DSR1090, provides important
preinstallation information, and shows you how to install the system in a typical cinematic exhibition
environment.
2.2 DSR1090 key features and benefits
The DSR1090 is a compact surround speaker for general-purpose cinematic exhibition that provides several
key features and benefits.
• The 90° horizontal ✕ 60° vertical acoustic coverage pattern provides good distribution of audio for small
to medium theaters.
• The advanced input plate features a high-current, spring-loaded terminal block that enables quick
installation without the need for spade lugs or a crimping tool.
• The high-frequency driver is a low-distortion 25.4 mm high-temperature polymer dome with a frequency
response up to 20 kHz.
• The low-frequency driver is a 10-inch transducer with a finite element modeling (FEM) optimized motor
and suspension, optimized cooling for low power compression, and a high excursion rating.
• An industry-standard four-hole mounting point on the rear of the enclosure allows for simplified and
flexible mounting solutions.
• Holes on the sides of the speaker cabinet are provided for installation of a mounting yoke.
2.3 DSR1090 preinstallation information
In a typical auditorium, the DSR1090 is installed in various locations throughout the auditorium, including
possible locations on side and rear walls, and overhead locations. Information is provided on the placement
of the DSR1090 in a standard auditorium and in a Dolby Atmos auditorium.
Figure 2: Standard Dolby Surround installation example (5.1/7/1)
Introduction to the Dolby DSR1090 Speaker
Dolby DSR1090 Owner's Manual 8
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Figure 3: Dolby Atmos installation
2.3.1 Placing the DSR1090 on a wall or ceiling
You can attach the DSR1090 to a wall or ceiling.
For 5.1 or 7.1 Dolby Surround auditoriums, you should follow standard industry practices for speaker
placement and aiming. For Dolby Atmos auditoriums, follow the instructions in the
Dolby Atmos
Specification Guide
, which you can download at https://professional.dolby.com/siteassets/cinema-
products---documents/dolby-atmos-specifications.pdf.
2.3.2 Determining horizontal aiming for side and rear speakers
For Dolby 5.1 or 7.1 surround installations, there is no requirement for horizontal angling of the side and rear
surrounds when speakers point toward the central listening area (CLA).
For Dolby Atmos installations, to determine the proper horizontal aiming for the side and rear surround
speakers, you need to define a rectangle within the CLA that includes the reference listening position (RLP).
For side and rear surround speakers that are adjacent to the CLA, aim the speakers directly into the
auditorium (that is, 0° from perpendicular), ±10°.
For installations that utilize speaker pairing, splay the paired speakers to improve sound coverage. For all
speaker pairs, we recommend these aiming parameters, which are based on the CLA:
• Aim the forward-paired speaker to the near-side forward corner.
• Aim the rearward-paired speaker to the near-side rear corner.
The following figure is an example of proper horizontal aiming for side and rear speakers.
DSR1090 preinstallation information
Dolby DSR1090 Owner's Manual 9
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Figure 4: Horizontal aiming for side and rear surrounds
2.3.3 Determining vertical aiming for side and rear speakers
For side and rear surround speakers, you should tilt the speakers vertically to orient the axis of each speaker
to the ear height of a seated listener in the farthest seat. You can aim the speaker higher, but not by more
than half the vertical coverage angle of the speaker. Typically, rear surround speakers should have the same
downward tilt. The tilt of the side surround speakers should not change abruptly (>10°) from speaker to
speaker along the array.
This figure is an example of side and rear vertical aiming.
Figure 5: Side and rear speakers vertical aiming
2.3.4 Determining the top surround position
You must always place top surround speakers as le/right pairs, with the le speaker and right speaker
located at the same distance from the front wall.
You must place the top surround speaker pairs symmetrically with respect to the screen center line. Typically,
the top surround arrays are placed in line with the le center and right center screen speakers.
We recommend wider spacing for tall auditoriums, which is also acceptable for typical auditoriums when
standard placement is unachievable. You should then determine the maximum width between top surround
speakers by elevation angles as follows, and is shown in the next figure:
Introduction to the Dolby DSR1090 Speaker
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1. Let E be the elevation angle of the nearest side surround speaker measured from the reference listening
position (RLP).
2. The elevation angle of the corresponding top surround array should be greater than or equal to 45
degrees plus half of angle E. For example, if E is 20 degrees, then the elevation angle of the top surround
array should be greater than or equal to 55 degrees.
3. If there is no side surround speaker directly adjacent to the RLP or it is unclear which speaker to
reference, you can obtain angle E from the midpoint between two side surround speakers, a unit slightly
in front and a unit slightly behind the RLP. Likewise, for the top surround elevation angle, 45 degrees +
E/2, you can use an interpolated point between two top surround speakers.
Figure 6: Determining top surround position
2.4 Selecting the DSR1090 bracket and yoke
Mounting brackets and yokes for the DSR1090 are sold separately (YK1090, MMA1090), or you can purchase
them from a party other than Dolby, such as Adaptive Technologies or MN Mounting Solutions. You should
choose a mounting bracket or yoke that meets the mounting requirements of the auditorium, allowing for
the required vertical and horizontal angle adjustment. The bracket or yoke must support the weight of the
DSR1090 (31 lb, or 14 kg) with at least a 5:1 safety factor.
Related information
Dolby DSR1090 dimensions on page 23
2.5 Selecting the wire for the DSR1090
It is important that you select the correct wire gauge for the DSR1090.
Typically, no more than 0.5 dB (or 11%) of power should be lost in the cabling. The DSR1090 input plates
accept an American Wire Gauge (AWG) of 18 AWG to 6 AWG (1 mm2 to 16 mm2). When selecting the wire
gauge, you should always follow industry-standard practices, based on the rated impedance of the speaker
and the cable length.
For the DSR1090, we recommend a wire gauge of 16 AWG to 12 AWG (1.5 mm2 to 4 mm2).
Selecting the DSR1090 bracket and yoke
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Note: The input terminals are marked with indicators to show the polarity. Per International
Electrotechnical Commission (IEC) standards, a positive voltage on the positive marked input results
in the transducers moving outward. You must verify the positive and negative markings for each
respective product. Always tie the cable down to the available hardware to minimize any buzzing or
pullouts. If possible, aer wiring is completed, play sound through the speaker to identify any
connection issues, buzzing, or rattling.
2.6 DSR1090 design simulations
There are .gll files that you can use to simulate the DSR1090 in acoustical simulation soware.
You can download a folder (Dolby_Surround_DSR1090_GLL_Files.zip) that contains the .gll files
at https://professional.dolby.com/product/cinema-audio-products/DSR1090/. To run the .gll files, use
EASE or EASE Focus soware. You can download the soware from https://focus.afmg.eu/index.php/fc-
downloads-en.html.
Note: Dolby provides simulations for the DSR1090 in sidewall and overhead positions to meet the
needs of an installation.
DSR1090 .gll file descriptions
There are two DSR1090 .gll files. The Dolby_DSR1090_Sidewall.gll file is for sidewall simulations
only. The zero-degree vertical aiming reference is at the back of the enclosure, and therefore the polar has a
built-in 15-degree downward angle from the transducers. The Dolby_DSR1090_Overhead.gll polar file
references the zero-degree vertical aiming reference to the front of the enclosure so that the transducers
directly point to the aiming location in the .gll file.
2.7 Additional information
There is additional information regarding the DSR1090 that you need to consider.
• System weight for stability calculations is approximately 14.1 kg (31 lb).
• Amplifier selection is aided by additional data, as indicated in the DSR1090 specifications.
• The power-draw specification provides the actual power draw in watts at the rated Vrms in the design,
instead of calculated power. This can aid in optimizing amplifier power budgets, as the measured power
is almost always lower than the calculated power (sometimes significantly).
• The maximum voltage peak specification is useful for selecting an amplifier that has a voltage rail at or
above the rating for the speaker maximum dynamic performance. Some amplifier companies provide this
data in their respective technical data sheets (or provide the data by request).
Related information
Dolby DSR1090 specifications on page 22
2.8 Contacting Dolby
You can contact Dolby Cinema Solutions and Support using email or regional telephone numbers. You can
also access documentation by visiting the Dolby customer portal.
Contact Dolby Cinema Solutions and Support
• Send an email to cinemasupport@dolby.com.
• Call:
AMERICAS: +1-415-645-4900
ASIA, CHINA, and PACIFIC RIM: +86-400-810-5850
EMEA: +44-33-0808-7700
JAPAN: +81-3-4520-9798
Introduction to the Dolby DSR1090 Speaker
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3
Assembling and installing the DSR1090
Instructions are provided for assembling and installing the DSR1090. Each section of instructions
specifies the tools that are necessary to complete the required tasks.
Caution: Dolby disclaims any liability, including damage or injury, for the use of
mounting hardware, supports, and brackets not supplied by Dolby. Any modification to
the speaker system (for example, mounting by drilling holes into the speaker system) will
render the product warranty null and void.
Following is an outline of this chapter:
•Installing a bracket
•Installing a yoke
•Aiming the DSR1090
•Installing the safety cable
•Connecting and configuring the DSR1090
Assembling and installing the DSR1090
Dolby DSR1090 Owner's Manual 14
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3.1 Installing a bracket
You can install the DSR1090 using an industry-standard speaker bracket that is designed to support the
weight of the speaker and is in compliance with Section 2.4 in this manual or the optional YK1090 yoke or
MMA1090 multipoint. (See the link at the end of this section.) The rear panel has an industry-standard hole
pattern and will accept a variety of brackets for mounting and aiming.
About this task
This tool is required to install the bracket:
• 4 mm hex driver
Procedure
1. Locate the four-hole mounting location on the back of the DSR1090.
Figure 7: Mounting hole locations
2. Loosen the M6 fasteners using the 4 mm hex driver, and then remove them.
3. Place the bracket on the rear of the speaker.
Figure 8: Install bracket
4. Add washers to the M6 bolts, and then attach the bracket with the M6 washer combination.
Installing a bracket
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5. Tighten the M6 bolts to the brackets to a torque value of 2.5 Nm. We recommend using a removable
thread-locking compound (for example, Loctite) on the fasteners.
Related information
Selecting the DSR1090 bracket and yoke on page 11
3.2 Installing a yoke
You can install the DSR1090 using an using industry-standard speaker bracket that is designed to support the
weight of the speaker and is in compliance with Section 2.4 in this manual or the optional YK1090 yoke or
MMA1090 multipoint. (See the link at the end of this section.)
About this task
This tool is required to install the yoke:
• 6 mm hex driver
Procedure
1. Remove the M10 bolts from the side of cabinet, and then adjust and place the yoke according to the
instructions from the manufacturer.
Important: If washers are required to properly fit the bolt, the installer must provide them.
2. Insert the M10 bolts through the yoke, and then into the cabinet.
3. Angle the cabinet if needed.
4. Tighten the bolts to 10 Nm.
Figure 9: Yoke installed
Related information
Selecting the DSR1090 bracket and yoke on page 11
Aiming the DSR1090 on page 17
Assembling and installing the DSR1090
Dolby DSR1090 Owner's Manual 16
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3.3 Aiming the DSR1090
When aiming the DSR1090, you can use a laser for accuracy.
3.3.1 Using a laser for horizontal aiming
Instructions are provided for horizontal aiming using a laser.
About this task
This tool is required for horizontal aiming:
• Installer-provided laser pointer
Procedure
1. Place the laser pointer on the outside le or right side of the DSR1090 enclosure.
2. Align the laser parallel to the side of the speaker. You may find that there is some vertical (up/down) dri,
but this will not aect how you obtain the horizontal angle.
3. Angle the DSR1090 horizontally until the laser is directed at the specified aiming point.
Figure 10: Aiming the DSR1090 horizontally
3.3.2 Using a laser for vertical aiming
Instructions are provided for vertical aiming using a laser.
About this task
This tool is required for vertical aiming:
• Installer-provided laser pointer
Procedure
1. Place the laser pointer on top of the DSR1090 enclosure.
2. Align the laser level with the top of the speaker. You may find that there is some side-to-side dri, but this
will not aect how you obtain the vertical angle.
3. Angle the DSR1090 vertically until the laser is directed at the specified aiming point, as shown in the
following figure.
Aiming the DSR1090
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Figure 11: Aiming the DSR1090 vertically
3.4 Installing the safety cable
About this task
Aer mounting the DSR1090 to the building structure with a bracket or yoke, you must follow instructions for
connecting a safety cable to an independent point on the building structure.
These tools and additional parts are required to install the safety cable:
• 6 mm hex driver.
• An M10 shoulder-style eyebolt. The eyebolt can be provided by the installer, or you can purchase an
appropriate M10 eyebolt (separately) from Dolby (Part number: 6009242).
• Installer-provided safety cable.
Attention: To properly fit into the DSR1090 threaded inserts the eyebolt must contain a threaded
sha that is at least 20 mm long. Based on the weight of the DSR1090 (31 lb [14 kg]), all installer-
supplied safety rigging hardware must be rated at a minimum 5:1 safety factor, or greater if a higher
requirement is mandated per local laws. Remove all slack to avoid any shock loading of the cable in
the event of a primary rigging failure.
Procedure
1. Locate the safety eyebolt mounting location on the back of the DSR1090.
2. Remove the corresponding M10 bolt from the cabinet using the 6 mm hex driver.
3. Remove the M10 eyebolt from the packaging, and then place it in the selected M10 threaded hole.
4. Secure the eyebolt firmly, and then attach the installer-provided safety cable to the building structure.
Figure 12: Attach the eyebolt
Assembling and installing the DSR1090
Dolby DSR1090 Owner's Manual 18
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Important: Size all hardware to allow at least a 5:1 safety factor, and remove slack from the safety
cable. Consult building plans and a licensed professional engineer, and follow all local laws for
overhead mounting.
3.5 Connecting and configuring the DSR1090
About this task
Aer mounting the DSR1090 to the building structure and connecting a safety cable, you must follow
instructions for connecting and configuring the DSR1090.
Required tool:
Wire stripper
Caution: Turn o all amplifiers when connecting speaker wiring.
Note: The input terminals are marked with indicators to show their polarity. Per IEC standards, a
positive voltage on the positive marked input causes the transducers to move outward.
Procedure
1. Locate the input plate on the top of the DSR1090.
2. Strip back the wire insulation/sheath to 18 mm.
3. Locate the spring-loaded orange terminal tab on the input plate, and then push it inward. Pushing it
inward opens the gap in the hole directly below the tab.
4. Insert all of the stripped wire into the terminal tab hole (observing proper polarity).
5. Release the terminal tab to secure the wire with the spring mount clamp.
6. Remove any stray wire strands in and around the terminal tab.
Figure 13: DSR1090 input plate location and connections
Figure 14: DSR1090 input plate
Connecting and configuring the DSR1090
Dolby DSR1090 Owner's Manual 19
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Note: In 5.1 and Dolby Surround 7.1 installations, it may be better to daisy-chain (series/parallel)
several DSR1090 speakers. You can do this by twisting the wire pairs and inserting them into the input
connector following steps 3 and 4 of the preceding procedure. When daisy-chaining speakers, always
verify that the driving amplifier specifications rate the amplifier at the appropriate level to handle the
resulting load impedance of the combined daisy-chained speakers.
Note: Always tie the cable down to the available hardware to minimize any buzzing or pullouts. If
possible, aer wiring is completed, play sound through the speaker to identify any connection issues,
buzzing, or rattling.
Assembling and installing the DSR1090
Dolby DSR1090 Owner's Manual 20
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Table of contents
Other Dolby Laboratories Speakers manuals
