Digital TDcontrollers
DTD-T-U DTD-T-N
DTD-I-U DTD-I-N
User Manual v1.4 (page 2)
Manuel Utilisateur v1.4 (page 9)
FCC INFORMATION (U.S.A.)
FCC information (U.S.A.)
1. IMPORTANT NOTICE: DO NOT MODIFY THIS UNIT!
This product, when installed as indicated in the instructions contained in this
manual, meets FCC requirements. Modifications not expressly approved by
NEXO-SA may void your authority, granted by the FCC, to use the product.
2. IMPORTANT:
When connecting this product to accessories and/or another product use only
high quality shielded cables. Cable/s supplied with this product MUST be used.
Follow all installation instructions. Failure to follow instructions could void your
FCC authorization to use this product in the USA.
3. NOTE:
This product has been tested and found to comply with the requirements listed in
FCC Regulations, Part 15 for Class “B” digital devices. Compliance with these
requirements provides a reasonable level of assurance that your use of this
product in a residential environment will not result in harmful interference with
other electronic devices. This equipment generates/uses radio frequencies and, if
not installed and used according to the instructions found in the user’s manual,
may cause interference harmful to the operation of other electronic devices.
Compliance with FCC regulations does not guarantee that interference will not
occur in all installations. If this product is found to be the source of interference,
which can be determined by turning the unit “OFF” and “ON”, please try to
eliminate the problem by using one of the following measures:
Relocate either this product or the device that is being affected by the
interference.
Utilize power outlets that are on different branch (circuit breaker or fuse) circuits
or install AC line filter/s.
In the case of radio or TV interference, relocate/reorient the antenna. If the
antenna lead-in is 300 ohm ribbon lead, change the lead-in to co-axial type cable.
If these corrective measures do not produce satisfactory results, please contact
the local retailer authorized to distribute this type of product. If you cannot locate
the appropriate retailer, please contact the After Sales department of NEXO-SA,
Parc d’Activité du Pré de la Dame Jeanne, B.P. 5, 60128 PLAILLY, FRANCE.
The above statements apply ONLY to those products distributed by NEXO-SA
or its subsidiaries.
* This applies only to products distributed in the United States of America.
Important safety instructions
1 Read these instructions.
2 Keep these instructions.
3 Heed all warnings.
4 Follow all instructions.
5 Do not use this apparatus near water.
6 Clean only with 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 amplifiers) 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 fit 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 specified by the manufacturer.
12 Unplug this apparatus during lightning storms or when unused for long periods
of time.
13 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.
Precautions
Please read carefully before proceeding. Please keep this manual in a safe place for
future reference.
WARNING! Always follow the basic precautions listed below to avoid
the possibility of serious injury or even death from electrical shock, shortcircuiting, damages, fire or other hazards. These precautions include, but are not
limited to, the following:
Power supply/Power cord
• Only use the voltage specified as correct for the device. The required voltage is
printed on the name plate of the device.
• Use only the included power cord if any.
• Do not place the power cord near heat sources such as heaters or radiators,
and do not excessively bend or otherwise damage the cord, place heavy objects
on it, or place it in a position where anyone could walk on, trip over, or roll
anything over it.
• Be sure to connect to an appropriate outlet with a protective grounding
connection. Improper grounding can result in electrical shock.
• Remove the electric plug from the outlet when the device is not to be used for
extended periods of time, or during electrical storms.
• When removing the electric plug from the device or an outlet, always hold the
plug itself and not the cord. Pulling by the cord can damage it.
• To disconnect this device from the mains, unplug the power cord.
• Always turn the power off when the device is not in use.
Do not open
• Do not open the device or attempt to disassemble the internal parts or modify
them in any way. The device contains no user-serviceable parts. If it should appear
to be malfunctioning, discontinue use immediately and have it inspected by
qualified NEXO-SA service personnel.
• NEXO-SA cannot be held responsible for damage caused by improper use or
modifications to the device or data that is lost or destroyed.
Water warning
• Do not expose the device to rain; use it near water or in damp or wet
conditions, or place containers on it containing liquids which might spill into any
openings.
• If any liquid such as water seeps into the device, turn off the power immediately
and unplug the power cord from the AC outlet. Then have the device inspected
by qualified NEXO-SA service personnel.
• Never insert or remove an electric plug with wet hands.
If you notice any abnormality
• If the power cord or plug becomes frayed or damaged, or if there is a sudden
loss of sound during use of the device, or if any unusual smells or smoke should
appear to be caused by it, immediately turn off the power switch, disconnect the
electric plug from the outlet, and have the device inspected by qualified NEXOSA service personnel.
• If this device should be dropped or damaged, immediately turn off the power
switch, disconnect the electric plug from the outlet, and have the device inspected
by qualified NEXO-SA service personnel.
PAGE 2 OF 16
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Location
• Before moving the device, remove all connected cables.
• When setting up the device, make sure that the AC outlet you are using is easily
accessible. If some trouble or malfunction occurs, immediately turn off the power
switch and disconnect the plug from the outlet. Even when the power switch is
turned off, electricity is still flowing to the product at the minimum level. When
you are not using the product for a long time, make sure to unplug the power
cord from the wall AC outlet.
• If this device is to be mounted in an EIA-standard rack, leave the back of the
rack open and make sure that it is at least 10 cm away from walls or surfaces.
Also, if this device is to be mounted with devices that tend to generate heat, such
as power amplifiers, be sure to keep an adequate gap between this device and the
heat-generating devices or install ventilation panels to prevent high temperatures
from developing inside this device.
• Inadequate ventilation can result in overheating, possibly causing damage to the
device(s), or even fire.
• Do not use the device in a confined, poorly-ventilated location. If this device is
to be used in a small space other than an EIA-standard rack, make sure that there
is adequate space between the device and surrounding walls or other devices: at
least 10 cm at the sides, 15 cm behind and 40 cm above. Inadequate ventilation
can result in overheating, possibly causing damage to the device(s), or even fire.
• Do not expose the device to excessive dust or vibrations, or extreme cold or
heat (such as in direct sunlight, near a heater, or in a car during the day) to
prevent the possibility of panel disfiguration or damage to the internal
components.
• Do not place the device in an unstable position where it might accidentally fall
over.
• Do not block the vents. This device has ventilation holes at the sides to prevent
the internal temperature from becoming too high. In particular, do not place the
device on its side or upside down. Inadequate ventilation can result in
overheating, possibly causing damage to the device(s), or even fire.
• Do not use the device in the vicinity of a TV, radio, stereo equipment, mobile
phone, or other electric devices. Doing so may result in noise, both in the device
itself and in the TV or radio next to it.
Connections
• Before connecting the device to other devices, turn off the power for all
devices. Before turning the power on or off for all devices, set all volume levels to
minimum.
• Use only speaker cables for connecting speakers to the speaker jacks. Use of
other types of cables may result in fire.
• XLR-type connectors are wired as follows (IEC60268 standard): pin 1: ground,
pin 2: hot (+) and pin 3: cold (-).
• Use only SP4 plugs for connecting SP connectors.
Maintenance
• Inspect the ventilation holes and clean them periodically. Dust and dirt can
seriously degrade the effectiveness of the cooling and result in malfunction or fire.
• Remove the power plug from the AC outlet when cleaning the device.
• The performance of components with moving contacts, such as switches,
volume controls, and connectors, deteriorates over time. Consult qualified
NEXO-SA service personnel about replacing defective components.
Handling caution
• When turning on the AC power in your audio system, always turn on the
device FIRST, to avoid speaker damage. When turning the power off, the device
should be turned off LAST for the same reason.
• Do not insert your fingers or hands in any gaps or openings on the device
(vents…)
• Avoid inserting or dropping foreign objects (paper, plastic, metal, etc.) into any
gaps or openings on the device (vents, etc.) If this happens, turn off the power
immediately and unplug the power cord from the AC outlet. Then have the
device inspected by qualified NEXO-SA service personnel.
• Do not use the device for a long period of time at a high or uncomfortable
volume level, since this can cause permanent hearing loss. If you experience any
hearing loss or ringing in the ears, consult a physician.
• Do not rest your weight on the device or place heavy objects on it, and avoid
use excessive force on the buttons, switches or connectors.
• Do not use this device for any purpose other than driving loudspeakers.
Important notice for the United Kingdom
Connecting the Plug and Cord
WARNING! THIS APPARATUS MUST BE EARTHED. IMPORTANT:
The wires in this mains lead are colored in accordance with the following code:
GREEN-AND-YELLOW: EARTH
BLUE: NEUTRAL
BROWN: LIVE
WARNING: As the colors of the wires in the mains lead of this apparatus may
not correspond with the colored markings identifying the terminals in your plug
proceed as follows:
• The wire which is colored GREEN-and-YELLOW must be connected to the
terminal in the plug which is marked by the letter E or by the safety earth symbol
or colored GREEN or GREEN-and-YELLOW.
• The wire which is colored BLUE must be connected to the terminal which is
marked with the letter N or colored BLACK.
• The wire which is colored BROWN must be connected to the terminal which
is marked with the letter L or colored RED.
This applies only to products distributed in the United Kingdom.
Compliance information statement (Declaration of
conformity procedure)
1) This device may not cause harmful interference, and
2) This device must accept any interference received including interference that
may cause undesired operation. See user manual instructions if interference to
radio reception is suspected.
This applies only to products distributed in the United States of America.
Important notice for Europe
Purchaser/User Information specified in EN55103-1 and EN55103-2.
Inrush Current: 8 A
Conforms to Environments: E1, E2, E3 and E4.
WARNING! This mark indicates a dangerous electrically live terminal.
When connecting an external wire to this terminal, it is necessary either to have
“a person who have received appropriate guidance on handling” make the
connection or to use leads or a cord that have been manufactured in such way
that the connection can be made simply and without problem.
PAGE 3 OF 16
DTD CONTROLLER INTRODUCTION
DTD Controller introduction
Welcome to the DTD controller manual. Please take some time to
read it and learn how to set up the device.
The DTD (Digital Temperature and Displacement) controller is a
loudspeaker controller dedicated to Nexo speakers.
It performs as a Nexo speaker system crossover, and provides
equalization, phase alignment and protection (by controlling the
speaker voice coil temperature and the cone displacement).
WARNING! Although the DTD Controller can be used
without computer, you will need to connect a computer running Nexo
Dory software at least one time before first use to select the proper
Nexo speaker setup (available on our website nexo-sa.com)
Audio Input and Output connections
How to integrate into the audio chain?
Place the DTD in the audio chain just before the power amplifiers,
typically at the output of a mixing desk or a routing matrix.
From mixing desk (Left Output) From mixing desk (Right Output)
To next DTD (In Left) To next DTD (In Right)
AES/EBU signal can be connected to the back panel female XLR3 input.
From digital mixing desk (AES Output)
Optionally, on DTD-T-N, two channels of Dantetm streams can be
received from the back panel RJ-45 connector.
From digital mixing desk (Dantetm Network)
Connecting the DTD-I audio inputs
On DTD-I, use back panel terminal block connector to connect a
balanced analog input signal.
From Analog mixing desk
Typical installation for a touring system (using DTD-T)
Typical installation for a fixed installation (using DTD-I)
Note that the outputs of the power amplifier are connected to the
DTD-T, while its integrated front panel patch is connected to the
speakers. With the DTD-I, power output of the amplifier will have to
be split in two (one used for DTD-I feedback, the other going to the
speakers).
WARNING! Unplug the device from mains before connecting
or disconnecting any cable to it.
The DTD can be fed through four type of audio signal:
• Balanced Analog Inputs (using 24 bits / 48 to 96 KHz converters)
• AES/EBU Input (24 bits / 44.1 to 96 KHz sample rate)
• USB Audio Input (16 bits / 48 KHz sample rate)
tm
• Dante
Input (Optional) (24 bits / 44.1 to 96 KHz sample rate).
AES/EBU signal can also be connected to the back panel terminal block
connector.
From digital mixing desk (AES Output)
Optionally, on DTD-I-N, two channels of Dantetm streams can be
received from the back panel RJ-45 connector.
From digital mixing desk (Dantetm Network)
Connecting DTD the audio outputs
The DTD outputs must be connected to professional grade audio
power amplifiers.
Up to ten amplifiers channels can be connected in parallel on one DTD
output.
On the DTD-T, use the back panel male XLR3 connectors to connect
the balanced analog outputs to the amplifier inputs.
To sub amplifier inputs To mains amplifier right in To mains amplifier left in
Connecting the DTD-T audio inputs
On DTD-T, use front panel female XLR3 connectors to connect the
balanced analog input signal. For both channels a male XLR3 is available
in parallel to link to other DTD.
Please check your audio source manual to know how many DTD
devices can be connected in parallel on its output.
PAGE 4 OF 16
On the DTD-I, use the back panel terminal block connectors to
connect the balanced analog output signal to the amplifier inputs.
AMPLIFIERS SETUP
Amplifiers setup
Refer to the datasheet of the Nexo speaker system used with DTD
and select the power amplifiers output power accordingly.
It is recommended to use only high quality, 32 dB gain amplifiers.
However, the DTD controller can operate with amplifiers with gain up
to 40 dB. Please check your amplifier user manual.
Any processing integrated on the amplifier like high-pass filter must be
disabled.
WARNING! Do not use amplifiers that introduce latency
between its inputs and outputs (amplifiers with integrated DSP for
example) as it will prevent the DTD to protect the speakers.
Sensing the amplifier outputs
WARNING! All Output of the power amplifiers must always be
fed back to the DTD to ensure correct speakers protection.
On the DTD-T, use a four wire SP4 cable to connect the output of the
amplifiers to the back panel SP4 inputs.
On the DTD-I, use a four wire speaker cable to connect the output of
the amplifiers to the back panel terminal block connectors.
From sub amplifier outputs From mains amplifier outputs
WARNING! Use at least a 0.5 mm² (AWG #20) double
insulated cable.
On amplifiers with two kinds of output connectors, one kind can be
used to connect the DTD-I amplifier sensing inputs while the other can
be used for connecting the speakers if not then a Y connection should
be used.
SP4 outputs fed the speaker Banana outputs to DTD-I
From sub amplifier outputs From mains amplifier outputs
WARNING! Use at least a 2.5 mm² (AWG #13) double
insulated cable.
For the SP4 cable coming from the mains amplifier:
• 1+/1- poles must be connected to mains amp left output.
• 2+/2- poles must be connected to mains amp right output.
For the SP4 cable coming from the
• 1+/1- poles must be connected to sub first output.
• 2+/2- poles must be connected to sub second output.
If only one sub channel is used (bridged amplifier for example) then
connect the two poles pairs of the DTD sub amp input on this unique
output:
• 1+/1- poles must be connected to sub mono output.
• 2+/2- poles must be connected to sub mono output.
The DTD-T will pass through these signals on the front panel:
• On the Left SP4 plug, mains amp left outputs on 2+/2- and sub amp
first outputs (or mono output) on 1+/1-.
• On the Right SP4 plug, mains amp right outputs on 2+/2- and sub amp
second outputs (or mono output) on 1+/1-.
sub amplifier:
To left main cabinet To right main cabinet
and left/mono sub and right/mono sub
• Connect the + and – poles for the Mains (left and right) amplifier
sensing to the Mains power amplifier outputs.
• Connect the + and – poles for the Sub amplifier sensing to the Sub
power amplifier outputs. The two poles pairs should be connected
even if only one channel of amplifier is used for the sub (bridged
amplifier for example).
Front panel interface
Graphical OLED display
The DTD uses a high luminosity graphical OLED display to show the
speaker setup running into the unit.
Front Panel Controls (DTD-T only)
Two rotary control knobs and a three position switch are available on
the front panel of the DTD-T.
• Use the sub gain control to adjust the sub channel output level
between -6 and + 6 dB.
• Use the main gain control to adjust the main channels output level
between -6 and + 6 dB.
Use the switch to select between the speaker system options:
• “WB” (Wideband) means the Main outputs are full range (no high-
pass) typically for use without sub. Advanced settings are set to
default.
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