Unika UD Series User manual

UD-064 600W x 4 High Efficient Switching Power Amplifier
UD-064D with Dante Input
Contents:
Overview & Features
Description
Getting Started
Configurations
eXtraTone & LPF
In & Out Interface
Dante
Applications
Specifications
Warranty
UNiKA Electronic Co., Ltd.
www.unika.com
6F, No.168, XinHu 2nd Road,
NeiHu Dist., Taipei 11494,
Taiwan (R.O.C.)
☏ [phone]
✉ [email protected]
The latest version of this manual with color illustration is available for download from our product pages below,
www.unika.com.tw/products-view.php?ID=166 (English)
tw.unika.com.tw/products-view.php?ID=167 (中文手冊)08/23/2021

UNiKA UD-064 & UD-064D Switching Power Amplifier
Overview:
The UD-064/UD-064D is a high efficient switching power amplifier with a concise and intuitive digital
control interface. The amplifier is designed to achieve its maximum output by paralleling speakers on its
outputs. Every output of the amplifier can deliver 600W of power on 4Ω load of parallelized speakers and
over a kilowatt of power on 2Ω load. The outputs also support bridging which can drastically extend output
capability up to 2 kilowatts on each bridged pair. It comes with an unprecedented eXtraTone™ mechanism
to compensate speaker for loss below its bass cutoff. Besides boosting the bass audio on cutoff frequency of
the speakers, eXtraTone™ mirrors the audio below the cutoff frequency in a way of harmonic audio over a
range of frequency above the cutoff frequency.
Features:
600W x 4 in single-ended outputs configuration with 4Ω speaker, or
2000W x2 in bridged outputs configuration with 4Ω speaker
High Efficient switching power supply and Class-D Switching power amplifier
eXtraTone™ to compensate speaker for loss below its bass cutoff
A subwoofer deidicated Low Pass Filter (LPF) is automatically indroduced on channels with a set of
bridged output (or a pair of parallelized inputs)
LPFMix auto feeds input of subwoofer dedicated LPF with a mono mixed from the other channels
Concise and intuitive digital operating interface to cut learning curve
All-time PPM meter with clip hold indicator for every output channel
Digital controlled variable cooling fans
Voltage and temperature monitoring and protection
Automatically compresses output in low operating voltage or high operating temperature
Volume and all the device configuration are automatically saved upon power-off or power loss
Auto-switching for AC voltage in range either 110~127V or 220~240V
Wide range of tolerance in AC voltage
Dante network interface in 1Gbps link speed (UD-064D)
Dante audio sample rate up to 96KHz (UD-064D)
DDM (Dante Domain Manager) is supported (UD-064D)
Two RJ-45 ports for Dante network make Daisy-chain cascading feasible (UD-064D)
slim 1U rack-mount chassis with elegant style of aluminum front panel
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
Description:
The UD-064/UD-064D is a high efficient switching power amplifier with a concise and intuitive digital
control interface and elegant style of aluminum facet. Although it comes in capability of high power driving,
the amplifier is crammed into 1U in height and merely sub ten kilogram in weigh due to its adoption of
power efficient and advanced switching technologies in both power supply and power amplification.
4KW Totally in Heavy Load of 2Ω
The UD-064/UD-064D amplifier is by default configured to operate as x4 individual channels (i.e., in x4
single-ended outputs) with 600W of drive capability for each channel with 4Ω speaker. Since the amplifier is
designed to be able to drive heavy loads with equivalent parallelized impedance down to 2Ω, you can even
drastically extend each output capability of the amplifier to the rank of kilowatt if you have speakers
parallelized on the output of the amplifier. Configuring a pair of outputs to work in bridge mode to drive a
4Ω speaker has the same effect as having each single-ended output of the bridged pair to drive a load with
equivalent impedance in half of the intrinsic impedance of the speaker. In either of the circumstances, the
amplifier can deliver power of up to 4KW to its outputs in total.
eXtraTone™ to Compensate Speaker for Bass Loss
The UD-064/UD-064D comes with an unprecedented eXtraTone™ mechanism to compensate speaker for
bass loss by boosting the bass audio on cutoff frequency of the speakers and mirroring the audio below the
the cutoff frequency in a way of harmonic audio over a range of frequency above its cutoff frequency. While
doing so the amplifier does not need to waste energy by sending power below the cutoff frequency to
speakers, the harmonic mirror of audio below the cutoff frequency enforces the audience perceptible feel of
the presence of audio below the cutoff frequency.
Low Pass Filter (LPF) and auto mono mix (LPFMix) dedicated for subwoofer
When a set of bridge output (or a pair of parallelized inputs) is configured in UD-064/UD-064D, a LPF filter
with adjustable cut-off frequency is automatically introduced in the signal path, so that you can direct
connect a subwoofer (or a couple of subwoofers) to its (their) channel output(s). Evenmore, if only one pair
of channels is configured with bridged output or parallized inputs, you can enable LPFMix and
automatically feed the LPF filter with a mono mixed from the other channels. That way you don't need an
extra mixer to generate L+R mix specific for the subwoofer(s).
Concise and Intuitive Digital Control Interface
All the features and functionalities of UD-064/UD-064D are precisely controlled digitally to avoid over time
annoying degradation or deviation introduced by traditional analog treatment. For simplified operation, there
are mere two buttons and one encoder for the whole control and monitoring operation. While the control
interface is concise, the information from it is far rich. Besides the digital volume control and 32-segment
PPM meter with clip hold for each output channel, the digital processor thoroughly provides device
information including temperature of each heatsink and transformer, revolution speed of each fan, AC
voltage, input parallelized and output bridged settings, and etc.. Of course, all the device configuration, such
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
as input parallelization, out bridging, input selecting, input sensitivity selecting, and etc., are set in a digital
way to minimize the chance of hardware failure.
Maintaining Performance According to Operating Voltage and Temperature
The audio outputs of UD-064/UD-064D are constantly monitored by a digital processor and the processor
can be automatically compressed to avoid audio clip due to low operating voltage or to avoid overheat
failure due to high operating temperature.
Low operating internal voltage can be caused by insufficient AC voltage on the field or heavy load on the
amplifier outputs. The digital processor compresses the peak portion of audio in a timely manner to avoid
clip sound due to the possible output being capped by the low operating voltage. This dramatically improves
the audio perceptibility by the audience whereas only a little of loudness on peak volume is sacrificed.
Operating temperature in the amplifier is always a big impact to the performance of the amplifier. The
processor in the UD-064/UD-064D tightly controls the revolution speed of the fans in the amplifier to cool
down the temperature in every heatsink and power transformer. In extreme case, if the fans with their max
revolution speed still can't blow out the heat fast enough, the built-in audio compressor in the amplifier will
compress the peak volume of audio to cut down the power dissipation to avoid device failure due to
overheat.
Auto-Switch for AC Voltage Selection
At power-on startup, the processor in UD-064/UD-064D automatically switches the rectifier circuit in the
amplifier according to the range of AC voltage from the outlet. Which means the amplifier can work
straightaway in an environment of AC range in either 110~127V or 220~240V without the user having to do
any setting of AC select in advance.
Wide range of tolerance in AC voltage
Beside the auto-switch features mentioned above, the tolerance of either AC voltage ranges is so wide that
make the amplifier still survive to operate in an AC voltage under its 80% of nominal voltage. For example,
after the amplifier is powered on, it can keep working fine in an AC voltage of 180V when it is supposed to
be powered by an AC source of 220~240V, though the maximum output power can be slightly limited
because of the insufficient of the supplied voltage.
Auto-Save on Power Loss
After power up, the processor automatically brings up all the previous settings used in previous run time.
The processor can even gradually turn up the output volume from mute to their previous so that, on every
power recycle, the user doesn't need to set the volume again while avoiding pop noise on power rush
simultaneously. The processor can even capture the settings, including volume settings, on the failure caused
by an AC shortage.
Dante Digital Audio Input
The UD-064D is also equipped with a x4 channels Dante interface which allows the amplifier to work fully
digitally by receiving digital audio from the popular Dante network. We fully integrate the Dante capability
to our UD-064D amplifier so that users can also quickly browse all the Dante information, such as Dante
Name, Sample Rate, Sync status, IP address, device lock status, DDM enrollment, and etc., on the display of
the front panel. The UD-064D can even display the events received from the Dante Network, including
events for device identify, clear configuration, reboot, firmware upgrading, and etc.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
Getting Started Guide:
Installation
Although the internal processor of UD-064/UD-064D can optimize the performance of the amplifier
according to the operating environment, too much high operation temperature and intermittent AC source
void the guarantee of the operation of the amplifier to meet the specifications.
Powering
The UD-064/UD-064D can work in a range of AC voltage of either 110~127V or 220~240V. The
amplifier detects the range of voltage from the AC outlet and automatically switches the circuit
of the internal rectifier to meet the range of AC voltage accordingly when the power switch is
pressed. A diffused white LED is integrated into the power switch to indicate the ON/OFF status
of the power switch.
The UD-064/UD-064D receives AC power via powerCON socket and a power cord
with lockable powerCON plug for rugged and safe power connection. A push to reset
circuit breaker is located next to the powerCON socket for additional overload
protection.
Control & Monitoring Interface
Besides the LCD display on the center of the front panel, there are mere two buttons (BACK & INFO/SET)
and one ENCODER for users to navigate all the control settings and monitoring status. The concise and
intuitive user interface leads to dramatically cutting down the learning curve of the user, so that most people
probably don't need to read through to the whole manual to setup the amplifier for operation.
ENCODER
There are two operation modes to the ENCODER,
browse mode: to browse the content for read only.
edit mode: to edit the value of the item being browsed to.
Briefly pressing the ENCODER can switch back and forth between the browse mode and edit mode.
Usually, the ENCODER is in browse mode for users to browse the operating status or device information. If
the item being browsed to is editable, the selected item is enclosed by a box. Simply pressing the
ENCODER will have the ENCODER switch to edit mode. When the ENCODER is in edit mode, a flashing
edit bar scores under the selected item to remind the user that the item is now editable by rotating the
ENCODER again. Rotate the ENCODER to change or edit the value of the selected item to whatever you
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
want, and briefly press the ENCODER again to complete the editing and exit edit mode. Pressing the BACK
button when the ENCODER is in edit mode can also bring back the ENCODER to browse mode.
For example: As illustrated on the right, the amplifier always
starts up with VOLUME menu in the middle of the display.
When you 1st rotate the ENCODER in the VOLUME menu,
you browse to the channel you wish to do the volume tuning.
The channel to which you are browsing is indicated by a
boxed enclosure. Once you press the ENCODER, the
channel to which you are browsing is editable and an
underscored edit bar is flashing to indicate the selected item
in edit mode. You then can now edit the volume by rotating
the ENCODER again. Once you complete your volume
tuning, press the ENCODER again (or press BACK button
alternatively) to exit edit mode. The edit bar below the
selected item vanishes to indicate backing to browse mode.
TIP: The above operations can be completed in a very swift way. Simply press and hold the
ENCODER on the selected item and simultaneously rotate the ENCODER to change the value of
the selected item. Release the ENCODER once you O.K. the new change. The ENCODER and the
selected item will automatically exit edit mode after you release the ENCODER.
BACK
The BACK button, as implied by the name, backs to the previous menu or exits the edit mode or browse
mode. You can always simply press the BACK button a couple of times to go back to the startup VOLUME
menu once you are lost in the menu navigation. Briefly press the BACK button when ENCODER in EDIT
mode makes ENCODER leave the edit mode; While briefly press the BACK button when ENCODER in
browse mode make the ENCODER leave the browse mode and save the edited value previously modified in
edit mode.
INFO/SET
There are two functions in the INFO/SET button.
Info: Briefly press the button to cycle through the different read-only menu for operating status or
device information.
Set: Long press the button to SETTINGS menu to set the device configurations
The INFO/SET button is for displaying device information or setting the device configurations. Briefly press
the INFO/SET button cycles through the status and information categorized as device info (INFO), Dante
(DANTE), temperature (TEMP), and fan speed (FAN). Each category may contain many items of
status/information which can be browsed by rotating the ENCODER. You can also use the ENCODER to
browse across the category boundary back and forth for quick navigation. Browsing to the end of items or
pressing the BACK button intermediately will return back to the startup VOLUME menu.
Long pressing the INFO/SET button for more than one second will bring up the device SETTINGS menu.
You can then browse the settings items by rotating the ENCODER, edit the selected item by pressing the
ENCODER, and complete the setting by pressing ENCODER again or by pressing BACK button.
TIP: Similarly to volume editing, you can also swiftly edit the selected setting item by
pressing/holding ENCODER and simultaneously rotating the ENCODER until you feel O.K. to
complete the setting by releasing the ENCODER.
LCD Display
The LCD display in the middle of the front panel shows the amplifier operating status and device
information. The initial menu shown up after power startup is the VOLUME menu. You can cycle through
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
to other menus by briefly pressing the INFO/SET button or go to SETTINGS menu by long pressing the
INFO/SET button.
Four PPM meters on the right and five parallelized/bridged indicators on the left are
permanently shown up on the display, no matter what menu is cycled through in the
middle on the display. The PPM meters show the output audio level for each channel of
the amplifier. The 0dBFS is aligned to the amplifier maximum output which means you
should never drive the input level, combined with the volume control and eXtraTone™
bass boost, over the 0dBFS. Otherwise, you hear an audible clip noise on the output of
the amplifier. There are clip hold indicators on the top of each PPM meter to bring up your attention if the
amplifier is overdriven. The 32 segments of each PPM is scaled from 0dBFS down to -60dB with each little
segment representing a 2dB difference in signal strength.
NOTE: The analog input sensitivity to drive the amplifier to its 0dBFS maximum output is
configurable in SETTINGS menu. You can cycle through 0dBu, 1V, and 1.4V for sensitivity setting
while the factory default is set to 1.4V.
Operation Menu on Display
There are totally 6 operation menus: VOLUME, INFO, DANTE, TEMP, FAN, and SETTINGS.
The UD-064/UD-064D starts up by default by showing the VOLUME menu in the middle of the display.
Briefly pressing the INFO/SET button will cycle through to the additional operation menus, in the order of
INFO, DANTE, TEMP, FAN, and back to VOLUME. Long pressing the INFO/SET button will specially
bring up the SETTINGS menu for device configurations. The details of these menus are described below,
VOLUME menu:
A speaker icon is stayed on the upper left of the display
when the content of VOLUME menu is being browsed.
The VOLUME menu is where you can tune the channel
volume individually. Rotate the encoder to browse to
different channels you wish to tune its volume, and
press the ENCODER for tuning the volume of the
selected channel.
The VOLUME menu is the default menu when the amplifier starts up. You can always press the BACK
button a couple of times to return back to VOLUME menu when you are lost in menu navigation.
NOTE:
The speaker icon on the upper left of the display will be replaced with a Dante icon if you
configure the amplifier to source input from the Dante audio network. Dante audio input will
be described later in the manual.
The position of CH2 (or CH4) can be instead displayed the cut-off frequency of the LPF
filter to CH1 (or CH3) input audio if there is a set of bridged output or a pair of parallized
inputs configured. The LPF filter will be addressed later in the manual.
When you browse and roll over the last channel in VOLUME menu, you are browsing to the
eXtraTone™ setting items which will be particularly described later in the manual.
INFO menu:
An information icon is stayed on the upper left of the
display when the content of INFO menu is being
browsed. The INFO menu is where you can browse
through the device operating information of the
amplifier, including,
MDL: Model Number of the device
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
UID: Unique ID assigned to the device
SW: Firmware Version in the device
ACin: AC Voltage (roughly estimated)
CMPRS: Compressing level on Output
NOTE:
A built-in compressor for output is automatically
engaged due to high operating temperature or low
operating voltage.
Long time operating the device in high temperature can cause the device to cease operation
due to part failure. The compressor will dynamically compress the audio in the portion of
high level when the temperature of any of the monitoring spots in the amplifier is over about
88℃ in order to reduce the power dissipation and cut heat generation.
Low AC voltage can cause audible clips due to insufficiency of rectified and filtered voltage
to drive the output to its nominal maximum. The compressor also compresses the output
audio in the portion of high level to avoid the audible clip noise when a low operating
voltage is detected.
The CMPRS item shows how many dB of output level is compressed due to high operating
temperature or low operating voltage.
The operating temperature in many of the monitoring spots in the amplifier can be found on
the TEMP menu described later.
The estimated AC voltage from the AC outlet is shown on the item next to CMPRS.
Although the reading follows the AC voltage from the AC outlet, there is about a four
seconds delay from the real voltage from the AC outlet. Also, please be informed that the
heavy loading on the output of the amplifier can pull down the operating voltage and reflect
as a lower reading of AC Voltage on the INFO menu. Therefore, the AC voltage reading in
the INFO menu is only meaningful when the amplifier does not heavily drive the loads on its
outputs. The AC voltage reading is not supposed to replace the meter that you use to
measure AC voltage on a daily basis.
DANTE menu:
UD-064D comes with a Dante interface built-in. A Dante icon is stayed on the upper left of the display
when the content of DANTE menu is being browsed. The DANTE menu is where you can browse
through the Dante related information in the amplifier, including,
Dante Name
Dante Sample Rate
Dante Clock Sync Status
Whether is the device elevated to be a clock master
Ethernet Link Speed
IP address assigned to the device
Whether the device is locked by Dante Controller
The DDM manager to which the device is enrolled
NOTE:
All the Dante related settings are configured by Dante Controller software. And the Dante
interface of UD-064D can be locked with password protect via the Dante Controller
software.
The Dante interface of UD-064D can also be enrolled in a DDM domain and be managed. In
the circumstance, the configuration of the Dante interface can't not be changed without the
allowance or the password of the DDM manager.
Also, you should make sure that the setting of the Dante sample rate of your UD-064D to
align with the sample rate of your whole Dante network. Basically, all the devices in the
same Dante network should be synced to the same sample rate.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
TEMP menu:
A thermometer icon is stayed on the upper left of the
display when the content of TEMP menu is being
browsed. The TEMP menu is where you can find the
operating temperature of all the monitored spots in the
amplifier, including
Temperature of Heatsink for amplifier of channel 1
and channel 2
Temperature of Heatsink for amplifier of channel 3 and channel 4
Temperature of Heatsink for power supply
Temperature of Transformer for power supply
Temperature of Digital Processor
The unit of temperature can be changed between ℃ and ℉ from TEMP setting item in the SETTINGS
menu.
FAN menu:
A fan icon is stayed on the upper left of the display
when the content of FAN menu is being browsed. The
FAN menu is where you can read the revolution speed
of cooling fans in the amplifier, including
Speed of Fan on rear left
Speed of Fan on rear right
Speed of Fan for power transformer
Speed of Fan on front right
The unit of fan speed can be changed between r/m (Revolutions per Minute) and r/s (Revolutions per
Second) from the FAN setting item in the SETTINGS menu.
SETTINGS menu:
A gear icon is stayed on the upper left of the display
when the content of SETTINGS menu is being browsed.
The SETTINGS menu is where you can configure the
operating parameters to the amplifier. The details of
each setting item is described in the following section.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
Device Configurations:
Long pressing the INFO/SET button more than one second will bring up the SETTINGS menu. You can
browse the content SETTINGS menu by rotating the ENCODER. Once you find the item you wish to
change the value of it, switch the ENCODER to edit mode by pressing the ENCODER on the selected item.
You will see a flashing edit bar under the selected item to indicate that the item is now editable. You can then
rotate the ENCODER again to change the value of the selected item to whatever you need. Once you feel
O.K. for the change to the item, simply press the ENCODER again or press the BACK button to leave the
edit mode.
TIP: The above operations can be completed in a very swift way. Simply press and hold the
ENCODER on the selected item and simultaneously rotate the ENCODER to change the value of
the selected item. Release the ENCODER once you O.K. the new change. The ENCODER and the
selected item will automatically exit edit mode after you release the ENCODER.
Here is the list of items in the SETTINGS menu,
PAR1&2: Input1 and Input2 are parallelized. And both
channels are fed by Input1 via XLR1. XLR2 is
disconnected internally to avoid unconscious noise
coupling.
PAR3&4: Input3 and Input4 are parallelized. And both
channels are fed by Input3 via XLR3. XLR4 is
disconnected internally to avoid unconscious noise
coupling.
PAR1~4: Input1, Input2, Input3, and Input4 are all parallelized. And all channels are fed by Input1 via
XLR1. XLR2, XLR3, and XLR4 are all disconnected internally to avoid unconscious noise coupling.
NOTE:
Three small indicators on the left of the display show up to remind users how inputs are
parallelized.
Turning on PAR1~4 will forcely disable PAR1&2 and PAR3&4 automatically.
PAR1~4 can turn on along with BTL1&2 and BTL3&4. In this circumstance, however, both
bridged BTL outputs are sourced from Input1 via XLR1 only.
BTL1&2: Output1 and Output2 are bridged to output.
Output2 is driven by the inverted audio from Input1.
Since both Output1 and Output2 are routed to
speakON1 socket, users can get bridged output from 1+
and 2+ contacts of the socket. XLR2 is disconnected
internally to avoid unconscious noise coupling.
BTL3&4: Output3 and Output4 are bridged to output.
Output4 is driven by the inverted audio from Input3. Since both Output3 and Output4 are routed to
speakON3 socket, user can get bridged output from 1+ and 2+ contacts of the socket. XLR4 is
disconnected internally to avoid unconscious noise coupling.
NOTE:
Two small indicators on the left of the display show up to remind the user how outputs are
bridged; while the user can also tell the bridge configuration from the combined bars of PPM
meters on the right of the display.
Please be informed that BTL1&2 and PAR1&2 are exclusive to each other which means
enabling BTL1&2 automatically disabling PAR1&2, and vice versa.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
Similarly, BTL3&4 and PAR3&4 are also exclusive to each other which means enabling
BTL3&4 automatically disabling PAR3&4, and vice versa.
INPUT: UD-064D comes with a Dante interface installed. This is where you can switch to receive audio
from the Dante network.
ANA: default analog audio inputs from XLR sockets are selected.
DNT: Dante network audio from RJ-45 ports is selected as input.
Please be informed that changing the source of input will reset the volume to MUTE to prevent
unconsciously overloading the amplifier due to overdriven input signal.
LPFMix: Set it to AUTO will automatically feed the
input of LPF filter with the mix of the audio from the
other channels instead, when the introduced LPF filter is
enabled. For example, if BTL3&4 is enabled while
LPFMix is set to AUTO, the mix of audio from Input1
and Input2 will replace the Input3 source and feed into
the input of the LPF filter which is introduced due to the
enabling of BTL3&4. The LPFMix won't be enabled if the LPF filter is not enabled. The usage of LPF
filter and LPFMix function will be described later in the manual.
TEMP: This is where you can switch between ℃ and ℉
as unit of temperature displayed in the TEMP menu.
FAN: This is where you can switch between r/m
(Revolutions per Minute) and r/s (Revolutions per
Second) as unit of fan speed displayed in the FAN
menu.
FAN_HI: This makes the fan run at a higher speed to
aggressively cool down the amplifier if the internal operating temperature of the amplifier suddenly
raises.. By default the setting item is disabled to make the amplifier operate quietly. The default setting
should be good for most circumstance unless you plan to put the amplifier to work in an environment
with temperature of more than 40℃ (or 104℉).
CMPRSR (Compressor): A built-in compressor will
by default automatically compress the output in low
operating voltage or high temperature. You have the
option to disable the compressor for whatever reason,
though doing so can more likely lead to audible clip
noise due to low operating voltage or amplifier shutdown due to over temperature.
NOTE: In some market, the compressor may be forcely set to engage automatically to prevent
the amplifier from inadvertently running into shutdown or causing any permanent damage in
the amplifier.
SNSTVT (Sensitivity): This is where you can set the analog input sensitivity to drive the amplifier to
its 0dBFS maximum. You can cycle through 0dBu, 1V, and 1.4V for input sensitivity while factory
default is set to 1.4V. The setting item only applies to analog input. The Dante digital input is not
affected by the setting item.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
Auto-Save and Reset Device Settings/Configurations
Auto-Save: All the items of settings or configurations, including the items for volume and eXtraTone™,
you change in edit mode are saved automatically when you press the BACK button to leave the browse
mode. When the processor is saving one or more items in the background, the background light of the
display flashes once to bring your attention to the saving activity. You don't need to press the BACK button
every time you edit a item because the processor will auto-save everything unsaved every time you press the
POWER button to switch off the amplifier. An unexpected interruption of AC power will also trigger an
auto-save activity so that you won't lose any modified setting or configuration.
Reset: For whatever reason, you may want to reset the settings of your UD-064/UD-064D back to its
factory default. To do so, press and hold the BACK button when you press the POWER button to start up the
amplifier. Once you see a message of "Device Reset to Default" with a wrench icon on the upper left of the
display, the amplifier has reset to its factory default. You can then release the BACK button and the
amplifier is ready for further operation.
Please be informed that the above reset operation does not affect the configurations of the Dante interface in
the UD-064D. To bring the configurations of the Dante interface to its factory default, you must either,
have your device connect to a computer running Dante Controller software and trigger a reset by
pressing the "Clear Config" button on the tab of device config in the device view window for your UD-
064D. You need to re-power your UD-064D for the default settings to take effect after you see a
message about "Dante Reset to Default" on the display of your UD-064D. Please be informed that you
can't reset Dante configuration via Dante Controller if the Dante interface is previously locked. You
must click the "unlock" button on the UD-064D device view window of the Dante Controller to unlock
the Dante interface before you can reset its configurations.
press and hold the DEFAULT button next to RJ-45 ports on the rear panel of your UD-064D when you
press the POWER button to start up your UD-064D. After more than 5 seconds you press the POWER
button, you can release the DEFAULT button and re-power your UD-064D for the default settings to
take effect.
Furthermore, if the Dante interface of your UD-064D is
previously enrolled in a DDM managed domain, all the
setting operations, including resetting to factory default, can
only be achieved via Dante Controller with DDM password.
If you forgot to un-enroll the Dante interface of your UD-
064D before it disconnected from the managed environment,
the Dante interface of your UD-064D is not going to work in
any other managed or unmanaged environment anymore. To
reset the Dante interface of your UD-064D from the previous
managed enrollment, you need to clear the domain
credentials in the Dante interface of your UD-064D. Solely (i.e., no other Dante device involved) connect
the Dante interface of your UD-064D to your computer with Dante Controller running, and click the "clear
Domain credentials" under the device drop down menu on device view window to your UD-064D.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
Error & Service Message
Although it is scarcely, you may see some kind of messages
with a wrench icon on the upper left of the display. This is
something about the operating event which need to be
brought up to your attention, such as follows,
Over Temp: It means the amplifier is now working at
over temperature. This message comes out with a
number showing the current operating temperature. A
message of Over Temp may immediately trigger a shutdown of DC power supply to the amplifier which
will consequently mute the audio on the outputs of the amplifier. When it happens, the amplifier is not
able to go back to work again and a message about "requiring a re-power on" will also pop up on the
display. Once you re-power the amplifier, you may also have to wait for the amplifier to cool down
below 80℃ to let the amplifier get ready to work again.
AC Shortage: It means an AC shortage is detected. This message comes out with a number showing the
current AC Voltage. When it happens, all the four internal output amplifiers will be disabled so that all
the outputs are muted. Of course, the processor in the device may enable the internal amplifiers to go
back to work after the AC source steadily comes back.
Check ACVolt: It means an abnormal AC voltage is detected. This message comes out with a number
showing the current AC Voltage. For example, if an AC voltage far above 127V but far below 220 is
detected, the error message will pop up to bring it to your attention.
Checking ACV: It means the processor is checking range of AC voltage. This message comes out with a
number showing the current AC Voltage. The message usually comes out at the very begining when you
press the POWER switch for the processor to determine how to switch the rectifier cicrcuit to meet the
voltage fed from the AC socket.
AC Over Volt.: It means an AC over voltage is detected. This message comes out with a number
showing the current AC Voltage. Although it won't have an immediate impact on the amplifier
operation, keeping the amplifier running at an excessively high AC voltage will shorten the life of the
amplifier.
DC Detected: It means a DC voltage is detected on any one of the outputs of the amplifier. All the four
internal output amplifiers are immediately disabled to prevent further possible damage on the speakers
connected. Since it belongs to a fatal event, the power supply in the device will also forcely die out and
won't startup again without a re-powering. If the message appears again after the amplifier is re-
powered on, you may have to contact the factory for repair service. Please be informed that a huge
clipped audio may also cause "DC Detected" due to the fact that the clipped portion of audio is actually
DC. Therefore, please don't overdrive the amplifier to make its output clipped.
Fan Stuck: It means any one of the fans in the amplifier gets stuck for whatever reason. This message
comes out with a number showing the fan speed of the affected fan. The error won't have a direct impact
on the operation of the amplifier initially, but can lead to a failure of over temperature in the long term.
Device Reset to Default: It reminds you that you have reset the amplifier to its factory default. As it was
mentioned previously, users can reset the amplifier to its factory default by pressing and holding the
BACK button while powering on the amplifier.
Dante Reset to Default: It means that someone has reset the Dante interface of the amplifier to its
factory default from Dante Controller software. The reset won't affect the current session of operation.
You need to re-powered the amplifier for the default settings to take effect on next run time.
Dante is Rebooting: It means that someone has triggered a reboot to the Dante interface of the amplifier
from Dante Controller software.
Dante was Rebooted: It means that the Dante interface has completed its reboot process. You may
sometimes need to re-power the amplifier for the processor in the amplifier to regain control of the
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
Dante interface.
Dante in Upgrading: Dante interface is in a process of software upgrading. Please wait for the upgrade
to complete and then re-power the amplifier.
Upgrade Done: The Dante interface of the amplifier has just completed a process of firmware upgrade.
Please re-power the amplifier.
Dante not OK: It means that Dante interface is not ready for operation. This can happen if you re-
powered on the amplifier immediately right after it was powered off. You may have to turn off the
amplifier again and wait for a couple of seconds to re-power it to let the Dante interface get a complete
recycle restart.
Most of the time, you can simply press the BACK button to ignore the error/service message even if the
power supply of the amplifier has been shut down for protection. However, a similar error/service message
may pop up again if an even worse condition occurs. For example, a message of a fan stuck at 1.2KRPM
may pop up after you ignored a message of a fan stuck at 1.5KRPM.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
eXtraTone™ to Boost the Bass Performance of Speakers
eXtraTone™ is an unprecedented digital algorithm to boost and compensate speaker for loss below its bass
cutoff.
Most speakers have their -6dB or -10dB bass cutoff frequency around 70Hz or so. Audio technicians may try
to extend acoustic response below the cutoff frequency by sending more power below the cutoff frequency
to speakers. However, sending more power below the cutoff frequency to speakers actually just wastes
energy over the speakers but does no benefit on audible bass perception to the audience.
eXtraTone™, on the contrary, cuts down the power of audio below the cutoff frequency to the speakers.
Besides boosting the audio on the cutoff frequency of the speakers, the eXtraTone™ mirrors the audio below
the cutoff frequency up to the range of frequency above the cutoff frequency in a way of harmony. Though
the audio below the cutoff frequency is cutting down, the audience can actually perceive the presence of bass
through the harmonic audio over a range of frequency above the cutoff frequency.
When eXtraTone™ is enabled, an indicator is shown up on
the bottom left of the display to remind users of its
engagement. Users browse to eXtraTone™ setting items by
rotating the ENCODER over the last item of channels in the
VOLUME menu. The setting items include,
Base Frequency: We recommend you to set this to the
-6dB or -10dB cutoff frequency of your speakers. The
eXtraTone™ provides a significant bass boost over the audio on the base frequency. Default is 63Hz.
Base Boost: Here you can set the intensity of bass boost on the base frequency set above. The
eXtraTone™ can boost a great amount of bass over the base frequency. Default is +2dB.
Harmony Boost: Here you can set the intensity of the harmonic mirror of audio below the base
frequency to pile up over the range of frequency above the base frequency. Default is +2dB.
eXtraTone™ On/Off: You have the option to turn off the eXtraTone™ feature. When it is turned off, all
the above three items are hidden in item browsing in VOLUME menu.
NOTE: The strength of Base Boost and Harmony Boost is actually dynamically controlled by the
processor in the amplifier. For example, a setting of +2dB Base Boost may actually boost audio in
base frequency up to 6dB if the input level is -30dB from its 0dBFS; while hardly more than 1dB if
the input level is almost reach its 0dBFS. The mechanism prevent the amplifier from overdrive,
while it also meke sesnse that the weak audio always requires more bass boost in the real world.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
LPF Filter and LPFMix Function for Subwoofer
Subwoofer is always power hungry, therefore, you may have to,
1. reserve more power for subwoofer by connecting subwoofer to a bridged output, or
2. have more than one subwoofer from outputs of channels with parallelized inputs.
Here are a couple of illustrations for the deployment with subwoofers.
Since the bridged output usually can provide power triple than a regular single-ended output, the first
approach can greatly boost audience's bass perception.
When you configure a set of bridged output (BTL) or a pair of parallelized inputs (PAR), a LPF (Low Pass
Filter) is automatically introduced in the signal path as the following block diagram.
The LPF filter cuts mid- and high-frequency components of audio from the output which allows you to
direct connect the subwoofer(s) to the output(s) of the amplifier without any speaker management processor
in front of the amplifier.
Please see an illustration on the right. The cutoff frequency
of the LPF filter can be adjusted on the item next to volume
setting for the BTL/PAR introducing it. The adjustable range
of cutoff frequency is 30 ~ 200Hz. You can disable or bypass
the LPF filter by roll the setting of the cutoff frequency over
200Hz, from where you can find that the reading of cutoff
frequency setting turns "noLPF" instead of "xxxHz".
In a simple or compact system where no audio console to
mix out a dedicated mono for subwoofer, you can enable the
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
built-in LPFMix function in UD-064/UD-064D to automatically generate a mono mixed from the other
channels and have the mono mix to feed to the input of LFP filter. Please look into the above block diagram
for understanding how LPFMix is positioned in the signal path. For example, if you have Left on CH1 and
Right on CH2, by enabling LPFMix as well as BTL3&4, you can have a mono mix of CH1 & CH2 to feed
the input of LPF filter when the LPF filter is enabled. By doing so, you actually get a LPF filtered output
mixed from Left and Right audio without an audio console involved.
NOTE:
The above block diagrams do not show the preceding gain controls on each respective analog
pre-amplifier
The control range of gain of each preceding gain control is about -16dB ~ +8dB. The operation
of the gain control is linked and integrated into the volume control of its corresponded channel
and is transparent to the users' operation. However, users do observe the initial volume change
on the input of LPF when users adjust the volume of the corresponded channels from where
LPFMix source in the range from 0dB down to -19 ~ -24dB (depending on the setting of
analog sensitivity).
When inputs are sourced from Dante network audio, the whole analog pre-amplifier is
excluded from the signal path, so the above block diagram is already completely depicted and,
for the above example, changing the volume1/volume2 won't affect the input level of LPF or
output level of LPFMix.
Furthermore, you have the option to enable the eXtraTone™
function along with the LPF filter, so that you can further extend
the bass performance of your subwoofer into the band of insanely
ultra low frequency. The overall frequency response might look like
the illustration on the right.
NOTE:
the LPF Filter is introduced only in the pair of channels
where either BTL or PAR is enabled.
the mono mix of LPFMix can only apply to the input of introduced LPF.
the LPFMix is forcely diabled if all the 4 channels belong to either a BTL or a PAR
configuration.
the eXtraTone™ function only applies to the pairs of LPF-filtered channels if any of the LPF
filters in the amplifier is enabled.
the LPFMix is by default set to OFF in the SETTINGS menu.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
Analog Audio Inputs
By default, the UD-064/UD-064D is configured to receive audio from
analog inputs via balanced XLR sockets on the rear panel. The
maximum acceptable signal level to the XLR input sockets is 24dBu,
and input sensitivity to drive the amplifier to its 0dBFS maximum
output can be set from SNSTVT setting item in the SETTINGS menu
mentioned previously.
The signal wiring on the contacts of XLR socket is exactly the same as industrial standard as follows,
1. Signal Ground
2. Signal +
3. Signal -
When you enable PAR1&2 (or BTL1&2), the Input2 is internally disconnected to avoid possible noise
coupling from the unused input. Similarly, when you enable PAR3&4 (or BTL3&4), the Input4 is
disconnected internally. Enabling PAR1~4 will internally disconnect Input2, Input3, and Input4 for the same
reason.
Power Output Interface
The amplifier outputs are routed to reliable and robust speakON sockets
with quick lock feature. The output of channel 2 is also routed to contact
2+/2- of speakON1 for bridged connection (a.k.a. BTL) or for Bi-Amp
speaker connection. Similarly, the output of channel 4 is also routed to
contact 2+/2- of speakON3 for the same purpose. The contact 2+/2- of
both speakON2 and speakON4 are left unconnected. See an illustration
for regular single-ended, bridged, and Bi-Amp speaker connections on the right.
speakON 1 speakON 2 speakON 3 speakON 4
contacts 1+/1- CH1 CH2 CH3 CH4
contacts 2+/2- CH2 N.C. CH4 N.C.
Since the UD-064/UD-064D amplifier is designed to be able to drive heavy load
with impedance down to 2Ω, each output of the amplifier can connect to a bunch
of parallelized speakers with equivalent impedance as low as 2Ω. Most speakers
with speakON sockets offer a pass through socket for the parallelizing, so audio
technicians can easily achieve the parallelizing of a bunch of speakers via cables
with speakON plugs.
NOTE: Though the power can be delivered from each output of the amplifier
depending on the load (impedance) connected on the output, the total power
of the amplifier can be delivered to all the connected speakers, however, is
restricted to about 4KW in AC240V environment or 3KW in AC120V environment. This is due to
the limited capacity of capacitors of the internal power supply.
USB Computer Interface
An USB2.0 port on the front panel is used for firmware upgrade on the factory side. Currently it is not
intended to be used for any application on the user side. Also, this belongs to a peripheral port and
does not offer the capability of delivering 5V power.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
Dante Audio Network Interface for UD-064D:
The UD-064D adopts Audinate Dante networking technology for AoIP (Audio over IP)
receiving. When the input of the amplifier sources from Dante audio network, a Dante
icon, instead of speaker icon, is shown on the upper left of
VOLUME menu on the display to remind users that the
digital audio from Dante network is selected as input. See
the illustration on the right for an example.
The UD-064D is by default configured to source audio from
analog inputs via XLR sockets. To source digital audio from
the Dante interface via RJ-45 ports, you need to switch the
INPUT setting item from ANA (Analog) to DNT (Dante) in
SETTINGS menu, as illustrated on the right.
The Dante interface is very network friendly with unlimited
flexibility in topology of deployment. It supports up to Layer
3 of IEEE 802.3 network standard, enabling you to organize
your audio network with the on-the-shelf Ethernet switches or to immediately transport streaming audio by
taking advantage of your existing installed network facility with no hassle. Even better, the UD-064D comes
with two Ethernet ports which allow you to physically cascade several UD-064Ds in the same network link
without an extra switch in between. Accompanying with Ethernet switches, this capability helps UD-064D
gaining flexibility and expanding territory in device deployment in audio networking.
The sample rate, as well as other configurations
such as device name and etc., for the Dante
interface of UD-064D are set via computer with
dedicated Dante Controller software. The
assignment of audio routing between UD-064D
and all the other Dante-enabled devices in the
same Dante network is also set via the Dante
Controller software. If you have a Dante Virtual
Soundcard software installed in a computer (or in
the same computer), you are even able to arrange
the audio routing with Dante Controller software
to have your DAW software direct play streaming
audio to UD-064D.
The Dante Controller software is available free
for download from the following Audinate webpage,
www.audinate.com/products/software/dante-controller
User's guide of Dante Controller can be found on the following webpage,
www.audinate.com/resources/technical-documentation
Among all the configurations and routing assignments in Dante Controller software, most importantly, you
should set the operating sample rate of your UD-064D to align with the sample rate of your whole
Dante network. Basically, all the devices in the same Dante network should be synced to the same sample
rate. You do not need to worry about the bit-depth of coding of your audio stream in network. Although the
UD-064D decodes audio in 24-bit PCM stream, it automatically does bit-depth converting when it streams
audio from other Dante-enabled devices manipulating audio data in different bit-depth.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty

UNiKA UD-064 & UD-064D Switching Power Amplifier
There are two LEDs on each of the RJ-45 ports for the Dante interface. The LEDs
reveal the network status described as follows,
Amber: 1Gbps network is detected
Green: flashing in network activity
A DEFAULT button next to RJ-45 ports is used to restore the Dante configurations of UD-064D to its
factory default. Press and hold the button when you power up the amplifier will restore the Dante interface
to its default state. Once you hold the button for more than 5 seconds after you press the power switch, you
can then release the DEFAULT button and re-power the amplifier for the default settings to take effect. The
cap of the DEFAULT button is sunk to panel to avoid your accidentally triggering the action of default
restoring.
Every Dante-enable device has a unique Dante name for identifying in the Dante
network. You can find the factory assigned Dante default name on a label in an
enclosure of Dante Default Name on the top panel of your UD-064D amplifier. The
Dante name of the Dante interface of your amplifier can be changed to whatever you like by using Dante
Controller software.
Usually, UTP (Unshielded Twisted Pair) Cat.5e cable should be good enough for all
the network installation for UD-064D. However, STP (Shielded Twisted Pair) cable
is strongly recommended if you plan to route the cable through a noisy
environment. The foil or braided screens in STP cable can provide great noise
immunity from electromagnetic interference around. Also, make sure the EIA/TIA-
568B standard is fully followed on the wiring of RJ-45 plug, as illustration on the right.
Overview Description Getting Started Configurations eXtraTone & LPF In & Out Dante Applications Specifications Warranty