The UD-064/UD-064D is a high-efficient switching power amplifier with a concise and intuitive digitalcontrol interface and elegant style of aluminum facet. Despite its high-power driving capability, theamplifier remains incredibly compact of 1U height and lightweight of under ten kilograms due to itsadoption of power-efficient and advanced switching technologies in both power supply and signalamplification.

2.4KW Totally in Heavy Load of 4Ω
The UD-064/UD-064D amplifier is by default configured to operate as x4 individual channels (i.e., in x4single-ended outputs) with 600W of driving capability for each channel with 4Ω speaker. You can evendrastically extend the drive capability of the amplifier to the kilowatt range, if you configure a pair ofoutputs to work in bridge mode to drive an 8Ω speaker.
Furthermore, each pair of the outputs of UD-064/UD-064D amplifier also supports driving parallelized Hi-Z speakers of either 70V or 100V subcategory if the pair of the outputs is configured to operate for BTL.

eXtraTone™ to Compensate Speaker for Bass Loss
The UD-064/UD-064D amplifier comes with an unprecedented eXtraTone™ mechanism to compensatespeaker for its intrinsic bass loss by boosting the bass audio on cutoff frequency of the speakers andmirroring the audio below the the cutoff frequency in a way of harmonic audio over a range of frequencyabove its cutoff frequency. While doing so the amplifier does not need to waste energy by sending powerbelow the cutoff frequency to speakers, the harmonic mirror of audio below the cutoff frequency enforcesthe audience perceptible feel of the presence of audio below the cutoff frequency.

SUB LPFilter and auto mono mix dedicated for subwoofer (SUBMix)
When a set of bridge outputs is configured in the UD-064/UD-064D amplifier, a LPF (Low Pass Filter)with adjustable cut-off frequency is automatically introduced in the signal path. When you decide to have asubwoofer on the bridged output, the LPF becomes a SUB LPFilter so that you can direct connect yoursubwoofer to the amplifier without any external SUB LPFilter in between. Evenmore, if only one pair ofchannels is configured as bridged output, you can enable SUBMix which automatically feeds the SUBLPFilter with a mono mixed from the other channels. That is a way you don’t need an extra mixer togenerate L+R mix specific for the subwoofer.

Adjustable Delay to Each Output
You have the option to enable a lossless digital delay right in the signal path ahead of the power stage of theUD-064/UD-064D amplifier. There are actually 4 delays for the 4 channel outputs and the delay time ofeach delay is independently adjustable up to 157ms in step of mini-second. The 157ms of delay time isequal to 54m (or 177ft) in speaker displacement which should be far enough for a small to mediumperformance venue.

Extended Sensitivity Control for Analog and Dante Inputs Respectively
Sensitivity control can be independently configured for analog and Dante inputs in the UD-064/UD-064Damplifier. Even more, the control range of both sensitivity are extended to 24dBu which means the analogsensitivity can be adjustable from 0dBu up to 24dBu while the Dante sensitivity can be adjustable from-24dB up to 0dB. The extended range of sensitivity control allows the amplifier to easily align with theother similar devices with a variety of sensitivities.

Concise and Intuitive Digital Control Interface
All the features and functionalities of UD-064/UD-064D amplifier are precisely controlled digitally toavoid over time annoying degradation or deviation introduced by traditional analog treatment. Forsimplified operation, there are mere two buttons and one encoder for the whole control and monitoringoperation. While the control interface is concise, the information from it is far rich. Besides the digitalvolume control and 32-segment PPM meter with clip hold for each output channel, the digital processorthoroughly provides device information including temperature of each heatsink and transformer, revolutionspeed of each fan, AC voltage, input parallelized and output bridged settings, and etc.. Of course, all thedevice configuration, such as input parallelization, output bridging, input selecting, input sensitivityselecting, 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 amplifier are constantly monitored by a digital processor and theprocessor automatically compresses the audio to avoid audio clip due to low operating voltage or to avoidoverheat failure due to high operating temperature.
Low operating internal voltage can be caused by insufficient AC voltage on the field or heavy load on theamplifier outputs. The digital processor compresses the peak portion of audio in a timely manner to avoidclip sound due to the possible output being capped by the low operating voltage. This dramaticallyimproves the audio perceptibility by the audience whereas only a little of loudness on peak volume issacrificed.
Operating temperature in the amplifier is always a big impact to the performance of the amplifier. Theprocessor in the UD-064/UD-064D amplifier tightly controls the revolution speed of the fans in the chassisto cool down the temperature in every heatsink and power transformer. In extreme case, if the fans withtheir max revolution speed still can’t blow out the heat fast enough, the built-in audio compressor in theamplifier will compress the peak volume of audio to cut down the power dissipation to avoid device failuredue to overheat.

Auto-Switch for AC Voltage Selection
At power-on startup, the processor in the UD-064/UD-064D amplifier automatically switches the rectifiercircuit in the amplifier according to the range of AC voltage from the outlet. Which means the amplifier canwork straightaway in an environment of AC range in either 110~127V or 220~240V without the userhaving 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 thatmake the UD-064/UD-064D amplifier still survive to operate in an AC voltage under its 80% of nominalvoltage. For example, after the amplifier is powered on, it can keep working fine at an AC voltage of 180Vwhen it is supposed to be powered by an AC source of 220~240V, though the maximum output power canbe slightly limited because of the insufficient of the supplied voltage.

Auto-Save on Power Loss
After power up, the processor in the UD-064/UD-064D amplifier automatically brings up all the previoussettings used in previous run time. The processor can even gradually turn up the output volume from muteto their previous so that, on every power recycle, the user doesn’t need to set the volume again whileavoiding pop noise on power rush simultaneously. The processor can even capture the settings, includingvolume 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 fullydigitally by receiving digital audio from the popular Dante network. We fully integrate the Dante capabilityto our UD-064D amplifier so that users can also quickly browse all the Dante information, such as DanteName, Sample Rate, Sync status, IP address, device lock status, DDM enrollment, and etc., on the displayof the front panel. The UD-064D can even display the events received from the Dante Network, includingevents for device identify, clear configuration, reboot, firmware upgrading, and etc.

• 300W x 4 in single-ended outputs configuration with 8Ω speaker, or
• 600W x 4 in single-ended outputs configuration with 4Ω speaker, or
• 1200W x2 in bridged outputs configuration with 8Ω speaker, or
• 600W x2 in bridged outputs configuration to drive a bunch of parallelized 70V/100V Hi-Z speakers
• High-efficient switching power supply and Class-D Switching power amplifier
• eXtraTone™ to compensate speaker for loss below its bass cutoff
• A subwoofer dedicated Low Pass Filter (SUB) is automatically introduced on channels configured as bridged output
• SUBMix auto feeds input of subwoofer dedicated SUB LPFilter with a mono mixed from the other pair of channels
• A Low Pass Filter (LPF) is automatically introduced on channels configured as bridged output for 70V/100V Hi-Z speakers
• Up to 157ms individual delay control over each output of the amplifier
• Concise and intuitive digital operating interface to cut learning curve
• All-time PPM meter with clip hold indicator for every output channel
• Cooling fans with digital speed controlled
• 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 of either 110~127V or 220~240V
• Wide range of tolerance in AC voltage
• Sensitivity of inputs of both Analog and Dante (UD-064D) adjustible in a ranage over 24dB
• Dante network interface in 1Gbps link speed (UD-064D)
• Dante audio sample rate up to 96KHz (UD-064D)
• Dante Domain Manager (DDM) is supported, and
• Dante Director, a cloud-based management platform, is also supported (UD-064D)
• Dante firmware updating from Dante Controller (UD-064D)
• Two RJ-45 ports for Dante network make Daisy-chain cascading feasible (UD-064D)
• slim 1U rack-mount chassis with elegant aluminum faceplate

Model		UD-064D
Single Ended Output (< 1% THD)	AC240V	330W@8Ω 600W@4Ω
	AC220V	280W@8Ω 500W@4Ω
	AC127V	330W@8Ω 620W@4Ω
	AC120V	320W@8Ω 550W@4Ω
	AC110V	265W@8Ω 465W@4Ω
	AC100V	220W@8Ω 380W@4Ω
Bridged Output (< 1% THD)	AC240V	1.2KW@8Ω 600W@Hi-Z(70V/100V)
	AC220V	1.0KW@8Ω 600W@Hi-Z(70V/100V)
	AC127V	1.2KW@8Ω 600W@Hi-Z(70V/100V)
	AC120V	1.1KW@8Ω 600W@Hi-Z(70V/100V)
	AC110V	920W@8Ω 600W@Hi-Z(70V/100V)
	AC100V	750W@8Ω 600W@Hi-Z(70V/100V)
AC Cord Connection		1x powerCON
Output Connector		4x speakON
Input Connector		4x XLR for Analog 2x RJ-45 for Dante
Dante Input Sensitivity		-24dB ~ 0dB in step of 6dB
Analog Input Sensitivity		0.775V (0dBu) / 1V / 1.4V / 6dBu / 12dBu / 18dBu / 24dBu
Analog Input Level		24dBu max.
Analog Input Impedance		22KΩ Balanced
Volume Control		-60 ~ 0dBFS per Channel
Delay Control		0 ~ 157ms per Channel
SUB Filter for SubWoofer		20~250Hz, -12dB/Oct
LPF Filter for Hi-Z Speakers		5~18KHz, -12dB/Oct
PPM meter with clip hold		32 segments per channel
Digitized Scaling		0dBFS at maximum output
Audio Encoding		Uncompressed 24-bit PCM
Sample Rate (Audio Process)		48KHz
Sample Rate (Dante Interface)		44.1KHz / 48KHz / 96KHz
Ethernet		x2 Gigabit RJ-45 Ports
Networking Mode		Switch Mode (a.k.a. Daisy-chain)
Dante Audio Latency		< 2ms typical
Dante Node to Node Distance		100m with Cat.5e Cable
Gain (Dante in)		36.6dB @0dBFS
Gain (Analog in)		31.5dB @sensitivity of 1.4V
Frequency Response		20Hz ~ 20KHz ±1dB @-1dBFS
S/N Ratio (A-weighting)		> 85dB @0dBFS
THD + Noise		< 0.15% @-3dBFS
Dynamic Range (A-weighting)		> 90dB
Crosstalk		< -85dB @1KHz
Output Impedance (20~1000Hz)		< 30mΩ
AC Voltage		110~127V or 220~240V Auto-Switching
AC Power Consumption		< 1650Watts
Operation Temperature		0 ~ 40℃
Operation Rel. Humidity		0 ~ 90%
Construction		Metal Chassis with Aluminum Front Panel
Dimensions (HxWxD)		44mm x 483mm x 490mm
Net Weight (including Power Cord)		9.3Kg

All the result are tested under load of 4Ω and AC source of 120V/60Hz or 240V/50Hz if not specified.
The above information is subject to change without notice.