Lexicon DD-8+ User manual

DD-8+ Network Amplier
Owner’s Manual

DD-8+ Power
Owner’s Manual
2
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance
with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including ampliers) that
produce heat.
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 t
into your outlet, consult an electrician for replacement of the
obsolete outlet.
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 specied by the
manufacturer.
12. Use only with a cart, stand, tripod, bracket, or
table specied 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.
14. Refer all servicing to qualied 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.
15. Use the mains plug to disconnect the apparatus from
the mains.
16. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.
17. DO NOT EXPOSE THIS EQUIPMENT TO DRIPPING
OR SPLASHING AND ENSURE THAT NO OBJECTS FILLED
WITH LIQUIDS, SUCH AS VASES, ARE PLACED ON THE
EQUIPMENT.
18. THE MAINS PLUG OF THE POWER SUPPLY CORD SHALL REMAIN
READILY OPERABLE.
TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR
BOTTOM COVERS. NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
TO COMPLETELY DISCONNECT THIS EQUIPMENT FROM
THE AC MAINS, DISCONNECT THE POWER SUPPLY CORD
PLUG FROM THE AC RECEPTACLE. THE MAINS PLUG OF
THE POWER SUPPLY CORD SHALL REMAIN READILY
OPERABLE.
WATCH FOR THESE SYMBOLS:
The lightning bolt triangle is used to alert the user to the
risk of electric shock.
The exclamation point triangle is used to alert the user
to important operating or maintenance instructions.
IMPORTANT
DD-8+ ampliers require Class 2 output wiring.
MAGNETIC FIELD
CAUTION! Do not locate sensitive high-gain equipment such as
preampliers or tape decks directly above or below the unit. Because
this amplier has a high power density, it has a strong magnetic eld
which can induce hum into unshielded devices that are located
nearby. The eld is strongest just above and below the unit.
If an equipment rack is used, we recommend locating the
amplier(s) in the bottom of the rack and the preamplier or other
sensitive equipment at the top.
CALIFORNIA PROPOSITION 65 WARNING This product contains
chemicals known to the State of California to cause cancer and birth
defects or other reproductive harm.
IMPORTANT SAFETY INSTRUCTIONS

Owner’s Manual 3
DD-8+ Power
European Representative’s Name and Address:
Harman International Industries Inc.
EMEA Liaison Oce, Herikerbergweg 9,
1101 CN Amsterdam, The Netherlands
Equipment Type: Power amplier Family Name: DD Series Model Names: DD-8+
EMC Standards:
EN 55013:2013 Sound and television broadcast receivers and associated equipment — Radio disturbance characteristics —
Limits and methods of measurement
EN 55020:2007+A11:2011 Sound and television broadcast receivers and associated equipment — Immunity characteristics —
Limits and methods of measurement
EN 55022:2010 Information technology equipment — Radio disturbance characteristics — Limits and methods of measurement
EN 55024:2010 Information technology equipment — Immunity characteristics — Limits and methods of measurement
EN 61000-3-2:2006+A1:2008+A2:2009 Limits for Harmonic Current Emissions (equipment input current less than or equal to 16A
EN 61000-3-3:2008 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply systems Rated Current less than or equal to 16A
Safety Standard:
EN 60065:2014 Safety Requirements – Audio, Video, and Similar Electronic Apparatus
Eco Design of Energy Standard:
(EC) No 1275/2008 &(EU) No 801/2013 Ecodesign requirements for standby, o mode electric power consumption of electrical
and electronic household and oce equipment
I certify that the product identied above conforms to the requirements of the EMC Council Directive 2014/30/EU, the Low Voltage
Directive 2014/35/EU, the ErP Directive 2012/27/EU and the RoHS Directive 2011/65/EU
Signed ___________________________________
Todd Eichenbaum
Title: Director of Engineering
Date of Issue: January 1, 2017
Issued By: Harman International Industries, Incorporated
8500 Balboa Blvd, Northridge,
CA 91329, UNITED STATES
FOR FIELD SERVICE
QUESTIONS CALL: 1 800 691 4171
DECLARATION OF CONFORMITY
Obtaining Other Language Versions:
To obtain information in another language about the use of this product, please contact your local Lexicon Distributor. If you need
assistance locating your local distributor, please contact Lexicon at 888-691-4171.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible
situation which may arise during installation, operation or maintenance.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have
occurred. To obtain the latest version of this manual, please visit the Lexicon website at www.lexicon.com.
Trademark Notice:
Lexicon and the Lexicon logo are registered trademarks of Harman International Industries, Inc.
Later versions of this manual and additional information about this product may be available at the Lexicon website at www.lexicon.com.
©2017 by Harman International,
8500 Balboa Blvd, Northridge, CA 91329 U.S.A. Telephone: [phone].

DD-8+ Power
Owner’s Manual
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This document contains general safety, installation, and operating instructions for the DD-8 Power Amplier.
It is important to read this user guide before attempting to use this product. Pay particular attention to safety
instructions.
The following symbols are used in this document:
Appears on the component to indicate the presence of uninsulated, dangerous voltage
inside the enclosure – voltage that may be sucient to constitute a risk of shock.
Appears on the component to indicate important operating and maintenance instructions in
the accompanying literature.
CAUTION Calls attention to a procedure, practice, condition or the like that, if not correctly performed
or adhered to, could result in injury or death.
WARNING Calls attention to a procedure, practice, condition or the like that, if not correctly performed
or adhered to, could result in damage to or destruction of part or all of the product.
NOTE: Calls attention to information that is essential to highlight.
DOCUMENTATION CONVENTIONS
FCC COMPLIANCE NOTICE
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.
CAUTION: Changes or modications not expressly approved by the party responsible for compliance could void the user’s authority to
operate the equipment.
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 instruction
manual, 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 o and on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
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.
CAN ICES-3 (B) / NMB-3 (B).

Owner’s Manual 5
DD-8+ Power
Thank you for purchasing your new Lexicon DD-8+ Network Amplier. The Lexicon® DD-8+ is an advanced multi-
channel amplier with network controlled matrix routing and multi-channel digital signal processing (DSP);
that provides a pallet sound shaping controls and system conguration tools. The DD-8+ features patented
DriveCore™ technology, delivering unprecedented levels of power from an amazingly small and lightweight
product. DriveCore takes more than 500 discrete components typically found in a switching amplier and fuses
them onto a single silicon chip about the size of a dime. Coupled with a power supply, this chip is capable of
generating big output levels into a wide variety of speaker loads giving you the exibility to power almost any
speaker from small in-ceilings to large in-room oorstanding models.
In order to receive the maximum peak performance from your Lexicon amplier, please take a few minutes
and completely read this manual. This important information will help you make certain that your DD-8+ is
properly congured for operation with the rest of the equipment in your system. Be sure to check Lexicon.com
periodically for the latest DD8+ updates.
Hardware Highlights
• Multi-patented DriveCore™ amplier technology
• 8-channels each with 125W into 8-ohms, all channels driven
• Four stereo, eight mono, or any combination stereo/mono channel conguration
• Local and Bus RCA inputs for single or multi-zone exibility
• DC trigger input/output and signal sensing for power control
• Front panel illuminated standby button
• Front panel channel status indicator LED’s
• Short-circuit and thermal protection circuitry
• High-eciency, quiet convection-cooled design
• Lightweight chassis only one rack space (1U) high
• Low-power consumption standby modes (less than 0.5W)
Conguration Dashboard Highlights
• Built-in Digital Signal Processor (DSP) accessible via Network-connected computer
• Matrix switcher – assigns any and all input sources to any or all outputs
• Optional renaming of every input and output channel
• Independent channel output level controls
• Check and update rmware from the dashboard
• Compatible with IP control/automation systems by Crestron, AMX, Control 4 and Savant
• Ten-band parametric equalizer with pink noise generator
• Bass and treble control per channel
• Output limiter per output channel
• Output time delay control
• Variable High-pass and Low-pass lters per channel
GETTING STARTED

DD-8+ Power
Owner’s Manual
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Installation Considerations
To ensure optimal performance, pay particular attention to the instructions below and to other precautions that
appear throughout this user guide.
DO install the DD-8+ on a solid, at, level surface such as a table or shelf. The DD-8+ can also be installed in a
standard 19-inch equipment rack using the rack-mount ears included with the product.
DO select a dry, well-ventilated location out of direct sunlight.
DO NOT install the DD-8+ on a surface that is unstable or unable to support all four feet.
DO NOT expose the DD-8+ to high temperatures, humidity, steam, smoke, dampness or excessive dust. Avoid
installing the amplier near radiators and other heat-producing appliances.
DO NOT install the DD-8+ near unshielded TV or FM antennas, cable TV decoders, or other RF-emitting devices
that might cause interference.
DO NOT place the DD-8+ on a thick rug or carpet, or cover the ventilation holes in the chassis, as this might
prevent proper cooling.
DO NOT place the DD-8+ on a windowsill or any location exposed to direct sunlight.
Installation Options
The DD-8+ is shipped without feet or rack ears installed. Both are included in the packaging and you will need to
install one or the other depending upon the type of installation/mounting required. If the DD-8+ is to be placed
on a shelf or audio furniture, you will need to attach the four plastic feet to the bottom of the amplier using a
#2 Philips screwdriver and the included hardware. (See Figure 1) If the DD-8+ is be mounted into an equipment
rack, you will need to attach the two metal rack ears to the left and right sides of the amplier using the included
T-10 Torx key. (See Figure 2)
Figure 2. Rack Ears Installation
Figure 1. Feet Installation
NOTE: If multiple DD-8+’s are to be rack mounted together, it is acceptable to “at stack” them one atop the
other in adjacent rack spaces without additional ventilation spaces left in between them. However, in some
installations or in heavy usage scenarios where multiple channels are consistently driven at high outputs
for long periods of time, it might be necessary to leave one empty rack space between the ampliers in
order to assist with heat dissipation and prevent thermal protection due to overheating.
GETTING STARTED

Owner’s Manual 7
DD-8+ Power
Front Panel
12
Figure 3.
1. Standby Button
2. Channel Status Indicator LED’s
1. Standby Button
Activates and deactivates standby mode when the DD-8+ amplier is connected to AC power.
When the DD-8+ is connected to AC power, the standby button LED will glow RED indicating that the unit is in
the standby mode. In this state, the power amplier section is not activated and the unit consumes minimal AC
power. Pressing the standby button from this state will activate the power amplier section and the standby
button LED will glow BLUE indicating that the DD-8+ is powered on.
NOTE: When the status of the DD-8+ changes or is powered up from standby mode, there may be a delay
in audio output and relay clicks may be audible. This is normal operation.
NOTE: If the trigger input is used on the DD-8+, it will override the standby button operation.
2. Channel Status Indicator LED’s
Indicates the status of each of the eight amplier channels when the DD-8+ is active.
When a channel is active, its LED indicator will glow BLUE. If the channel is in standby, the LED will be o. If a
channel has a fault, the LED will blink BLUE indicating the presence of a short or some other problem related to
that channel. (See the Troubleshooting section for more information.)
BASIC OPERATION

DD-8+ Power
Owner’s Manual
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Back Panel
Figure 4.
1
2 910
6 8
3 4 75
1. Bus Output
2. Bus Input
3. Analog Inputs
4. S/PDIF Digital Inputs
5. Speaker Outputs
6. Ethernet Port
7. Trigger In/Out
8. AC Main Power Connector
9. MAC ID Label
10. Reset
CAUTION: Never make or break
connections to the DD-8+ unless the
DD-8+ and all associated components
are powered o
WARNING: Do not connect the outputs
of one channel to the outputs of other
channels or to other ampliers.
BASIC OPERATION

Owner’s Manual 9
DD-8+ Power
The DD8+ is a network amplier and must be connected to a network router via the Ethernet jack on the back
of the unit. Most of the controls normally found on the front and rear panels of an amplier can be found in the
Conguration Dashboard that is accessed via a PC/Mac connected via web browser. See Conguration Dashboard
instructions.
Connection Terminals
1. Bus Output
Provides a line-level RCA connector loop/pass through output for connecting multiple DD-8+ ampliers in a
system utilizing a single stereo bus input signal.
If the DD-8+ is used as a single zone amplier and the input signal is connected via the Bus Input, that signal can
be output via this pair of RCA connectors to additional DD-8+ ampliers connected in the same manner.
NOTE: The number of DD-8+ ampliers that can be connected in this manner is limited by the output
voltage of the signal source device driving the bus input as it must support the total impedance of all of the
bussed devices.
2. Bus Input
Provides a line-level RCA connector input to simultaneously feed any or all speaker output channels utilizing a
single stereo bus input signal. The Matrix Switcher allows any input to be assigned to any single or combination
of output channels. See the Advanced Operation – Matrix Switcher on page 20 for more information.
3. Analog Inputs
Provides a line-level RCA connector input to feed any or all speaker-level output channels. The Matrix Switcher
function allows any analog input to be assigned to any single or combination of output channels. See the
Advanced Operation – Matrix Switcher section on page 20 for more information. These inputs are numbered 1-8
on the rear panel but may be renamed. See Conguration Dashboard instructions beginning on page 14 for more
information on relabeling and input assignment.
4. Digital Inputs
These inputs are numbered 1-4 on the rear panel but may be renamed within the Conguration Dashboard.
Inputs accept coaxial cable feeds from digital sources that can be assigned to any or all output channels using
the Matrix Switcher function in the Conguration Dashboard. See the Matrix Switcher section on page 20 for
more information.
BASIC OPERATION

DD-8+ Power
Owner’s Manual
10
5. Speaker Outputs
Provides connection for up to four pair of stereo speakers (eight speakers total) to the DD-8+. Connection
is provided via phoenix-type connectors that accept bare wire terminations. The connectors are grouped in
pairs with one connector each for output pair 1-2, 3-4, 5-6 and 7-8. Each pair consists of four wire terminations:
positive (+) and negative (–) for the Left channel and positive (+) and negative (–) for the Right channel. To
attach speaker cables to the phoenix connector, strip approximately ¼” (13mm) of insulation o of the end of
the positive and negative leads of the cable and insert the bare ends into the corresponding position of the
phoenix connector, tightening the screw terminals on top to secure the termination. Repeat this procedure for
each speaker.
NOTE: Use 16-gauge or larger speaker wire in order to ensure low-impedance connections between the
amplier and speakers. Be sure to observe correct polarity when making connections to speakers: Positive
(+) leads to the Positive (+) terminals and Negative (–) leads to the Negative (–) terminals.
CAUTION: The speaker outputs on the DD-8+ are balanced (dierential) and should
not be connected to any equipment that grounds the Negative (–) terminals.
6. Ethernet Port
Provides access to the Conguration Dashboard for system set-up including channel volume trim, input
assignment, equalization and other functions. See Conguration Dashboard instructions on page 14. After initial
set-up it provides connection to IP control/automation systems from Crestron, Control 4, Savant and AMX. See
Third Party IP Control Systems instructions on page 26.
7. Trigger In/Out
Provides connectivity for remote 5-15VDC trigger signals used to activate and deactivate the standby mode of
the DD-8+.
The Trigger In and Out connections can be used to activate and deactivate the standby mode of the DD-8+
from devices such as remote control systems, preampliers or other external devices. The Trigger In and Out
connections are duplicated for both 1/8”(3.5mm) mono mini-plug and phoenix- style connectors. Use the
Trigger In for making connections to external control devices that will activate and deactivate the DD-8+
standby mode. The Trigger Out does not provide DC power on its own, but can be used for making Trigger In
daisy-chain connections to additional DD-8+ ampliers or other components that need to mimic the DD-8+
power state.
NOTE: When a remote trigger is connected it will override the front panel standby button operation.
NOTE: Trigger connections are required if you plan to use the Green Mode feature with a third party IP
control system. When Green Mode is engaged, instructions from IP control systems will not restore the
amplier to ON. Only a trigger signal will return the amplier to ON status.
BASIC OPERATION

Owner’s Manual 11
DD-8+ Power
BASIC OPERATION
To install a trigger cable:
• Power the controlling source and DD-8+ amplier o.
• Connect the trigger cable to the controlling source and the DD-8+ amplier.
• After the connections are made, power on the controlling source and the DD-8+ amplier. After the
source unit is fully powered up, the LED power indicator on the front of the DD-8+ should be lit BLUE.
• Verify the trigger is working by putting the source unit into standby mode. The DD-8+ amplier after a
short delay will also go into the standby mode and the power indicator will light up RED.
• Once you have veried that the trigger cable is working, only use the source unit to power on and o
your DD-8+ amplier.
WARNING: When installing the trigger cable, never have the controlling source or DD-8+
amplier powered on; doing so will cause the trigger device to work improperly and could
cause damage to both the source and amplier.
8. AC Main Power Connector
Provides an AC power connection to the DD-8+ using the supplied power cord.
After all audio and system connections have been made, connect the power cord to an AC power source. Be sure
that any device connected to the remote trigger input is powered o when connecting the DD-8+ power cord to
an AC outlet.
WARNING: Do not plug the DD-8+ directly into the “Switched Accessory” outlet of another
device! These outlets are intended for use with low current draw products such as tuners,
CD players, Blu-ray players and other similar devices. These outlets are not designed to
handle the high current draw of a power amplier. Using these outlets for a power amplier
is a signicant safety hazard.
9. MAC ID
The MAC ID for the unit is provided on a label located above the Ethernet port on the back on the DD-8+. This
identier is unique to every unit – record and store this ID for network identication.
10. Reset
Resets all functions and controls to factory defaults.
NOTE: The RESET button will erase all custom congurations enacted up to that point in time. Use only as
a last resort when all other attempts to correct a fault have failed. See Troubleshooting and Maintenance
section on page 27.

DD-8+ Power
Owner’s Manual
12
Identify DD8+ IP Address for Web Conguration Dashboard Access
Overview
The Lexicon DD8+ features a web-based Conguration Dashboard for system set-up. As long as the DD8+
is connected to the same network as the controlling device (PC, Mac or Mobile device), the Conguration
Dashboard can be accessed via an Internet Browser such as Chrome, Safari or Firefox. The web GUI provides
a highly convenient means of accessing the internal DSP to congure the DD8+ for maximum usability and
performance.
NOTE: The DD8+ is optimized for tablets. The user experience diers slightly depending on the system.
Graphic refresh rates vary depending on browser, operating system, speed and connection to the network,
as well as the speed of the controlling device. In some circumstances the graphics may take several seconds
to redraw.
Hardware Connection
1. Begin by hardwiring the DD8+ RJ45 Ethernet connection to a router.
2. Take note of the MAC ID listed above the Ethernet port. You will later identify the device on the network by
this ID number.
Figure 5.
3. Connect your computer or mobile device to the same router (wired or wireless).
4. Make sure the DD8+ is powered on and is not in standby mode (blue light should be illuminated).
NOTE: The DD-8+ will not communicate with the network in standby mode.
There are a few dierent ways to identify the DD8+ on the network. Several free software applications are
available for PC, Mac, and iOS that will scan the network from a. Many installers nd this process the simple and
fast. This process is outlined below.
NOTE: The DD-8+ will use DHCP to obtain an IP address, therefore, the IP address is assigned by the router
and will change each time the unit is connected. The Mac ID will remain the same for the particular unit.
BASIC OPERATION

Owner’s Manual 13
DD-8+ Power
Identifying the IP Address – Windows 7, 10
1. Download an IP Scanner ( search “ ip scanner for PC” there are several).
2. Make sure you are on the same network as the DD-8+.
3. Once program is open, click“Scan”
4. The DD8+ can be identied by the MAC address and Manufacturer name. (Harman)
5. Take note of the IP address
6. Type the associated IP address into your web browser (internet explorer not recommended) to access the
DD8+ Conguration Dashboard
Identifying the IP Address – iOS Device
1. Search for “Free Network Analyzer”or similar search on the App Store. There are several free applications.
2. On your iOS device: go to settings / Wi-Fi and select the same network that the DD-8+ is connected to.
3. Open the application on your iOS device and select the “LAN” Function then press “Scan”.
4. The DD8+ can be identied by the MAC address and the name“Harman Specialty Group”
5. Type the associated IP address into your web browser to access the DD8+ Conguration Dashboard.
Identifying the IP Address – Mac OSX (Lion and newer)
1. Install a Lan Scanner from the App Store.
2. Make sure you are on the same network as the DD-8+
3. Open the application on your mac OS device and select Scan function on LAN.
4. The DD8+ can be identied by the MAC address and the Vendor name “Harman Specialty Group.”
Identifying the IP Address – through the network router
Dierent brands of routers have dierent user interfaces and terms. Generic instructions are below. Consult your
router manual for more information on navigating the router manufacture’s UI.
1. Log in to your network router page
2. Look for attached devises, this may be in the advanced tab.
3. Look for the device name DD8P – XXXXXX (last 6 characters of MAC ID) this may be under ‘”Wired Devices”
4. Type the associated IP address into your web browser (internet explorer not recommended) to access the
DD8+ Conguration Dashboard
NOTE: The DD-8+ will use DHCP to obtain an IP address. If that fails use the factory assigned static IP
address of 192.168.50.4 as a fallback. You may need this number in order to access the Conguration
Dashboard functions.
BASIC OPERATION

DD-8+ Power
Owner’s Manual
14
BASIC OPERATION
Conguration Dashboard — Set-Up, Inputs And Processor Channels
The Conguration Dashboard is a highly convenient means of accessing the Digital Signal Processor (DSP) to
congure the DD-8+ for maximum usability and performance. Several vital features, functions and controls can
be found only within the Conguration Dashboard.
The window pictured in Figure 6 will appear.
6 7
8
16 171510 12
1314
11
9
3
2
5 4 1
Figure 6. Conguration Dashboard
IMPORTANT! 1. Check for Update
Click this link to check for the latest rmware version. Follow updating rmware instructions.
IMPORTANT! 2. Auto Powerdown
Enables the audio Signal Sense circuitry for all inputs when the checkbox is selected. The default value is ON
(Auto Powerdown engaged). To turn this o you must deselect the check box. Save as a preset in order to
preserve the state in the event of a power outage.
The Auto Powerdown circuitry allows the DD-8+ to activate any or all channels when an audio signal is detected
at its assigned input(s) and deactivate any or all output channels when no audio signal has been detected for
30 minutes. When the DD-8+ is powered on and the Auto Powerdown is engaged, amplier output channels
with signal present will be active. Output channels without signals present at their assigned inputs will remain
switched o until signals are detected. In this mode, power consumption is lowered by switching o idle
channels. In cases where Auto Powerdown is engaged and no audio signals are present on any channels for
more than 30 minutes, all channels will be switched o and only the front panel standby button will glow blue
while the DD-8+ continues to monitor all inputs for a signal.

Owner’s Manual 15
DD-8+ Power
BASIC OPERATION
IMPORTANT! 3. Green Mode
Enables the extreme low-power ½ Watt automatic standby mode of the DD-8+. The default value is ON (Green
Mode engaged). To turn this o you must deselect the check box. Save as a preset in order to preserve the state
in the event of a power outage.
The DD-8+ is a highly ecient design with lower-than-average power consumption at standby, idle and in
normal operation mode. The Green Mode lowers standby power consumption even further to ½ Watt by
disabling all circuitry except that required for the front panel standby button. If the Green Mode checkbox is
selected (the default state), the DD-8+ will automatically revert to standby and enter this extreme low-power
state after one hour without signal present at any of the inputs.
If the both the Green Mode and Auto Powerdown checkboxes are deselected (disengaged), the DD-8+ will
remain on indenitely regardless of the presence of input signals until the amplier is put into standby mode via
external trigger or the front panel standby switch when a trigger is not connected.
NOTE: If the DD-8+ is being used with a 3rd party IP control system, the control system will be able to
“wake up” the DD-8+ from Green Mode only with a trigger signal. In the event of a power outage the DD-8+
will be able to “wake up” by pressing the front panel Standby button or by an external trigger. Connecting a
trigger is highly recommended when using the DD-8+ in systems with IP controllers.
4. Device Name
Allows use of the connected computer’s keyboard to give the DD-8+ a unique name to help identify it, such as
“Third oor zones.”To change the label, access via the Network Settings link on the Conguration Dashboard.
5. Network Settings
Click this link to Rename Device Name, and establish network communication. By default the“Use Static IP”
checkbox is unchecked indicating that the DD-8+ will use DHCP to obtain an address. Should DHCP fail click the
checkbox to use the static factory-assigned IP address 192.168.50.4.
NOTE: If you are not familiar with Network settings and DHCP protocols, use the static IP address or get
help from an IT or other network specialist.
6. Conguration Name, Load Preset And Save To Preset
Allows the installer to set up to three global conguration presets that can be recalled via 3rd party IP control
systems. The CONFIGURATION NAME input displays and lets the installer name the current conguration, such as
PARTY, LATE NIGHT, etc. and indicates changes made since loading the preset.
Set up the audio parameters for the preset, use the SAVE TO PRESET dropdown menu to save the current
conguration over one of the 3. Use the LOAD PRESET dropdown menu to load one of the 3 presets or the
default settings, replacing the current conguration.
7. Connected
When green, conrms that the external PC is properly connected to the DD-8+ Conguration Dashboard.
8. Trigger In
Lights green when external on/o trigger voltage is applied to the DD-8+.

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9. Input Labels
Each Input channel may be relabeled simply by typing in the output label eld. Best practice is to rename inputs
with the name of the source, such as CD Player L&R, Spotify, & etc.
10. Matrix Switcher
The DD-8+ oers a powerful matrix switcher that allows complete control of signal routing congurations. See
Advanced Operation - Matrix Switcher on page 20 for more information.
11. Pink Gen (Pink Noise Generator)
When selected, activates a pink noise on the selected processing channel and corresponding outputs. When
used with a SPL meter or real Time Analyzer, pink noise is helpful in setting volume levels, selecting bass/treble
levels and parametric equalization See Advanced Operation – Matrix Switcher on page 20 for more information on
how to route pink noise to any given output(s).
12. Treble
Adjusts Treble output at 7kHz and above from -12dB to +12dB in 0.5dB increments. 0dB is default. Level changes
are eected either by directly typing in the desired value, sliding the indicator icon or using the arrow up/down
buttons. Changes made here are illustrated in the interactive frequency response graphs within the Parametric
EQ area of the Dashboard.
13. Bass
Adjusts Bass output at 150Hz and below from -12dB to +12dB in 0.5dB increments. 0dB is default. Level changes
are eected either by directly typing in the desired value, sliding the indicator icon or using the arrow up/down
buttons. Changes made here are illustrated in the interactive frequency response graph in the Parametric EQ
area of the Dashboard.
14. Volume trim
Each channel’s relative volume may be set from –6dB to +6dB in 0.5dB increments. This feature is handy for
correcting for stereo volume imbalance due to asymmetrical speaker/listener placement or environmental
factors, or for balancing levels between inputs so that the audible volume does not vary wildly as the user
switches from one input to another. Use the Pink Noise feature described on page 22 to help set input trim.
Default is 0dB. Level changes are eected either by directly typing in the desired value, sliding the indicator icon
or using the arrow up/down buttons.
15. Link A-B, C-D & Etc.
When selected links the two adjacent processor channels together so that MUTE, and CHANNEL VOLUME are
linked into a single control for both linked channels. When deselected the two adjacent processor channels’
MUTE and CHANNEL VOLUME controls are independent of each other. The default is LINKED (checked).
BASIC OPERATION

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DD-8+ Power
BASIC OPERATION
16. Mute
When selected, completely mutes any inputs routed through that processor channel. Default is unchecked or
OFF (not muted).
17. Channel Volume
Provides speaker-level volume control for each processor channel or stereo pair. Any inputs routed through the
processor will be aected by this volume control. Volume level changes are eected either by directly typing
in the desired value, or using the arrow up/down buttons. Output levels range from -70dB to +12dB in 0.5dB
increments. Default is 0dB.

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Conguration Dashboard — Outputs
1
2
4 5 6 7 8 9 10
Figure 7. Outputs Dashboard
1. Output Labels
Each output channel may be relabeled simply by typing in the output label eld. Best practice is to assign the
room or zone names in place of the default output labels of 1 - 8 etc.
2. Matrix Switcher Outputs
Assigns processor channels A – H to specic outputs. See Advanced Operation - Matrix Switcher instructions on
page 20.
3. SIG Indicator
When lit green, indicates that signal is being routed to the output channel. If any given channel is not green, use
the Matrix Switcher to select the desired input and processor channel.
4. Clip
Indicates when an amplier output is exceeding its undistorted power limit. Use the MAX VOL control to reduce
the maximum allowable volume.
5. Mute
Mutes to 0dB the selected output channel. Default is OFF (unchecked).
6. Dim
When selected lowers output volume by -20dB. Default is ON.
NOTE: Because this -20dB mute function is engaged by default, it is the rst place to look if you can’t get
enough gain out of a given channel or pair.
7. Output Volume
Sets the volume level of the loudspeakers connected to outputs 1 – 8.
BASIC OPERATION

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DD-8+ Power
BASIC OPERATION
8. Turn On Vol
Sets the initial volume upon initial turn-on or restoration from Powerdown mode from -70dB (softest) to +12dB
(loudest). Volume level changes are eected either by directly typing in the desired value, sliding the indicator
icon or using the arrow up/down buttons.
9. Max Vol
Sets the “hard stop”maximum output volume regardless of the gain selected by external volume controls. It’s
a handy feature to prevent damage to loudspeakers and parental eardrums. Volume level changes are aected
either by directly typing in the desired value, sliding the indicator icon or using the arrow up/down buttons.
10. Limiter
The limiter tracks the level of the input audio signal and prevents it from exceeding a pre-determined threshold
by reducing its gain. Use the dropdown menu to select -3dB, -6dB or -9dB limiter settings. OFF is default.
Check For Firmware Update
IMPORTANT! Once you have accessed the DD8+ dashboard, you should immediately check for rmware updates.
1. Click Check for Update Hyperlink.
2. If your device is not up to date, you will
see your DD8+ version number does
not match the Latest Version.
3. Click the Click here to update! Button. 4. Wait for les to load. Do not interrupt
this process.
5. Once complete you will see your
rmware is up to date.

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Owner’s Manual
20
Matrix Switcher
The DD-8+ oers a powerful matrix switcher that allows complete control of signal routing congurations.
Any input can be routed through any processor channel and then routed to any individual or multiple output
channels.
It is beyond the scope of this manual to describe every possible scenario and signal routing possibility. Figure 8
illustrates the architecture and logic of the mixer.
ADVANCED OPERATION
8 Processing Channels
A, B, C, D, E, F, G, H
Parametric Equalizer,
Filters, & Delay
Speaker Output
Channels 1-8
Input Channels
8 Analog, 8 Digital, 2 Bus,
1 Pink Noise
Signal Flow
Signal Flow
Signal Flow
Figure 8. DD-8+ Signal Flow