NuPrime DAC-9 User manual

NuPrime
DAC-9

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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.

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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 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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From Hi-Res to Extreme Resolution
High-volume storage has become cheap enough for the proliferation of hi-res music
beyond CD quality (16-bit/44.1kHz). Storing 24-bit/96 kHz or 192 kHz music with PCM
encoding in uncompressed format (typically WAV) or lossless compression format (such as
FLAC, M4A, WMA) has become standard practice for audio enthusiasts.
Music is typically recorded in 24 or 32-bit PCM or DSD format at the recording studio. It is
then converted to lower resolution format for mass-market distribution.
Pulse-code modulation (PCM) is a method used to digitally represent sampled analog
signals. It is the standard form of digital audio in computers, compact discs, digital
telephony and other digital audio applications. In a PCM stream, the amplitude of the
analog signal is sampled regularly at uniform intervals and each sample is quantized to
the nearest value within a range of digital steps. A PCM stream has two basic properties
that determine the stream's fidelity to the original analog signal: the sampling rate, which
is the number of times per second that samples are taken, and the bit depth, which
determines the number of possible digital values that can be used to represent each
sample. DXD is simply PCM 24-bit/352.8 kHz.
Direct-Stream Digital (DSD) is the trademark name used by Sony and Philips for their
system of digitally recreating audible signals for the Super Audio CD (SACD). DSD
uses pulse-density modulation encoding – a technology to store audio signals on digital
storage media that are used for the SACD. The signal is stored as delta-sigma modulated
digital audio, a sequence of single-bit values at a sampling rate of 2.8224 MHz (64 times
the CD Audio sampling rate of 44.1 kHz, but only at 1⁄32768 of its 16-bit resolution).