NuForce uDAC-3 User manual

NuForce
uDAC-3

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FCC Notice - Declaration of Conformity Information
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 uses and can radiate
radio frequency energy and, if not installed and used in accordance with the instructions, 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 off 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 different from that to which the
receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
WARNING: Only peripherals complying with the FCC class B limits may be attached to this
equipment.
Changes or modifications made to this equipment, not expressly approved by us or parties
authorized by us could void the user’s authority to operate the equipment. 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.
SAFETY INSTRUCTIONS
There are two categories of Safety Instructions included in this manual:
•Product Warnings, (i.e., what must never be done to assure avoiding those hazards that
could cause bodily injury or property damage); and
•User Directions (i.e., what must always be done to assure the safe use of your device).
The Safety Instructions contained in this manual have been categorized in accordance with the
seriousness of the potential hazards through the use of Signal Words. Those Signal Words, and
their intended meanings, are as follows:
DANGER: Indicates that a failure to observe the Safety Instructions could result in death or
catastrophic bodily injury.
WARNING: Indicates that a failure to observe the Safety Instructions could result in serious
bodily injury.
CAUTION: Indicates that a failure to observe the Safety Instructions could result in minor
bodily injury or property damage.
NOTE: Designates important information that relates to activities and/or conditions that might
result in loss of data and/or damage to your device.
Safe Use and Operation of Your Device
This equipment emits stray RF energy and will interfere with the reception of signals by
airborne electronic navigational devices or medical devices. Do not operate this equipment
near any sensitive medical devices.
WARNING: Use only grounded AC power cords.
Always immediately disconnect the power to the equipment in the event the device emits an
unusual odor or sound or generates smoke.
WARNING: Never attempt to disassemble, repair or make any modification to your device.
Disassembly, modification or any attempt at repair could cause bodily injury or property
damage, as well as damage to the device itself.
WARNING: Your device is not a toy. Never allow children to play with your device. Misuse,
rough or improper handling of your device by children could result in serious bodily injury for
any of the enumerated safety warnings in this manual. In addition, always keep all accessories
and components out of the reach of small children as small parts might present a choking

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hazard. Seek immediate medical attention if choking occurs or if any small part has been
swallowed.
CAUTION: Never raise the sound volume level too high when using your device with
earphones. An excessive sound volume level could cause damage to your hearing.
WARNING: To reduce the risk of fire or electric shock, do not expose the unit to moisture or
water.
Do not allow foreign objects to get into the enclosure. If the unit is exposed to moisture, or a
foreign object gets into the enclosure, immediately disconnect the power cord from the wall.
Take the unit to a qualified service person for inspection and necessary repairs.
Read all the instructions before connecting or operating the component.
Keep this manual so you can refer to these safety instructions.
Heed all warnings and safety information in these instructions and on the product itself. Follow
all operating instructions.
Do not use this unit near water.
You must allow a minimum 10 cm or 4 inches of unobstructed clearance around the unit. Do
not place the unit on a bed, sofa, rug, or similar surface that could block the ventilation
openings. If the unit is placed in a bookcase or cabinet, there must be ventilation of the cabinet
to allow proper cooling. Keep the component away from radiators, heat registers, stoves, or any
other appliance that produces heat.
The unit must be connected to a power supply only of the type and voltage specified on the
rear panel.
Connect the component to the power outlet only with the supplied power supply cable or an
exact equivalent. Do not modify the supplied cable.
Do not route the power cord where it will be crushed, pinched, bent, exposed to heat, or
damaged in any way. Pay particular attention to the power cord at the plug and where the cord
exits the back of the unit.
The power cord should be unplugged from the wall outlet during a lightning storm or if the unit
is to be left unused for a long period of time.
Immediately stop using the component and have it inspected and/or serviced by a qualified
service agency if:
•The power supply cord or plug has been damaged.
•Objects have fallen or liquid has been spilled into the unit.
•The unit has been exposed to rain.
•The unit shows signs of improper operation.
•The unit has been dropped or damaged in any way

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Descriptions:
The NuForce µDAC is a high-performance USB Digital Audio Converter (DAC)
that connects your personal computer's audio to your home stereo, desktop
sound system, or headphones. The quality and versatility of the µDAC's
performance belies its diminutive size. With its extensive power supply, filtering
capabilities and charge-pump circuit as a foundation, the µDAC accurately
processes incoming data via a USB audio receiver. A D/A converter stage then
translates the data into an analog signal with a robust 2.0-Vrms-output
capability. The NuForce µDAC’s performance equals or exceeds that of a great
many audiophile CD players. The unit’s exemplary flexibility –– analog RCA,
digital coaxial, and high-performance headphone outputs –– is bound to satisfy
the needs of the most critical music lover.
Features:
!24-bit, 96kHz support
!Discrete USB audio receiver and D/A converter
!Asynchronous operation provides double jitter-reduction at data input and
over-sampling filter stages
!High voltage 2V analog output
!No capacitors in the audio signal path
!Low power consumption
!Coaxial S/PDIF output
!High-quality analog volume control
!USB powered, no external power supply required
Front Cover Descriptions:
!High performance USB Audio DAC delivers superior sound by connecting
your computer or tablet to your home stereo or headphones.
!Works with PC and Mac USB Audio
!Portable via USB power (a powered USB hub is needed for tablet with
limited USB power)