Audinst Inc. is audio component manufacturing company that launched in 2009. With the goal of bringing PC-based audio components to the hi-fi grade level, the company possesses technical staff with excellent know-how’s on digital and analog sound technology along with professional designing part with outstanding aesthetic senses in external-type equipment design. We are putting our utmost effort in making unique high quality products for both domestic and overseas markets, to become the unrivaled, leading company in the field.

HUD-mini was developed to realize sound quality that could be attained from Hi-Fi audio equipment only by connecting to USB port of notebook or desktop PC. It has simple and elegant design with easy installation and mobility using external USB DAC, and it was designed as high performance Hi-Fi audio equipment internally applying integrated design to the maximum in small space to make best performance in spite of compact size.

Equipped with Highest Grade of
OPAMP and High Performance
Headphone Amplifier

 
It realized high performance and high fidelity
audio with very low distortion of THD+N
0.00003% and ultra low noise by the adoption
of LME49860 of National Semiconductor for
DAC output stage. Also, you can enjoy sufficient
sound volume using the headphone of less than
300Ω by the adoption of AD8397 of Analog
Device. High quality audio signal which is
generated through high-level components is
applied to speaker, earphone or headphone

as it is providing HiFi level of audio environment. 

High End Performance
Our high-end audio USB DAC
provides the dramatic high quality
playback, bringing out the latent
possibilities of PC Audio from
computer-based average audio
quality to CDquality sound through
our advanced technologies.

Feature
● Application of high purity TCXO on Clock Generator of USB Controller.
● Application of high performance ALPS potentiometer on head phone output volume controller.
● Application of high grade film capacitor of WIMA on a low-pass filter terminal.
● A total of five special purpose regulators, high performance low-ESR and many tantalum
capacitors are applied for supplying stable and high quality power.
● The DAC power terminal is applied with high performance solid capacitors of super low-ESR
& high ripple current.
● A highest quality metal film resistor of Vishay-Dale applied for high-end audio equipment is
adopted.
● DDC function is mounted capable of outputting a USB digital audio signal to the S/PDIF
(Optical TX).

Loaded with Burr-Brown PCM1791A,
the high quality D/A Converter
The PCM1791A provides balanced voltage
outputs, allowing the user to optimize analog
performance externally. The PCM1791A also
accepts interface to external digital filter devices
(DF1704, DF1706, PMD200). The PCM1791A
also supports the time-divisionmultiplexed
command and audio (TDMCA) data format.
Sampling rates upto 200 kHz are supported.
The data converters use TI’s advanced segment
DAC architecture to achieve excellent dynamic
performance and improved tolerance to clock
jitter.

Installation of Temperature Compensated Crystal Oscillators (TCXO)
TCXO is made of an extremely thin crystal, creating peculiar
vibration when applied with electricity. It is often used on
resonance circuit to generate uniform frequency of electronic
circuits. However, frequency error in which vibration counts of
TCXO vary can arise depending on outside temperature, and
such appearance can become a main reason for errors or
frequency distortions on precision electrical equipments. In order
to reduce frequency discrepancies due to exterior temperature,
TCXO uniformly maintains interior temperature within crystal
oscillator and fixates the frequency, making it an essential
component for audio equipments sensitive to frequencies.

Slim & Smooth Design
A subdued silver colored body is
curvaceously treated to receive a smooth
feeling when grasped with one hand,
and a finishing touch of slim panel on
front/rear surfaces maximizes a
ompactness of the product.

Equipped with Highest Grade of OPAMP and
High Performance Headphone Amplifier
It realized high performance and high fidelity audio with very low
distortion of THD+N 0.00003% and ultra low noise by the adoption of
LME49860 of National Semiconductor for DAC output stage. Also, you
can enjoy sufficient sound volume using the headphone of less than
300Ω by the adoption of AD8397 of Analog Device. High quality audio
signal which is generated through high-level components is applied
to speaker, earphone or headphone as it is providing Hi-Fi level of
audio environment.

Equipped with LDO Regulator of High Performance and Ultra Low Noise and Inverter Circuit for Power Stage
Positive and negative voltages are required to drive high performance
OPAMP of dual power type. After the rectification process of USB
power supplied via USB port to stable power without noise through
LDO regulator and Low-ESR capacitor, the best analog signal with
ampleness and density which can be attained from high-end
equipments can be created by the provision of consistent dual power to
OPAMP circuit via high performance inverter.

88.2 kHz Support
88.2 kHz rarely supported on most of USB Audio DAC is supported in
native mode. ※88.2 kHz support enables a multiple up-sampling relative
to 44.1kHz, which is an audio CD format.

Anti-POP Circuit Mounted
The line-out output terminal is mounted with an anti-POP circuit to
minimize pop noise generated from a speaker when a computer is
turned on or off.

Convenient Portability and Compatibility
Convenient portability enabling easy installation with a simple USB cable at any place where a
computer is available, and optimal compatibility free from user OS environment just by plugging
without a cumbersome installation of driver to automatically recognize Windows XP/Vista/
Windows 7/8 and Mac OS X

※ Installation by being downloaded with a separate driver from website enables use
of Qsound (Windows XP excepted) and AC3-Passthrough function from windows,
and is supported by 24bit/88.2kHz and the like.

Super light and compact Mini DAC
Most of DACs are imagined as being
somewhat unsophisticated, but HUD-mini is
so light and small-sized as to be held in
one hand, thereby providing a convenient
portability. Although there is a disadvantage
in that small size may restrict DAC function
to decrease sound quality, HUD-mini is fully
complemented to overcome the restriction,
and has come a long way to reduce
egradation of sound quality based on
objects of super-lightness, compactness
and accumulated technology only available
at Audinst.

Interface
USB 1.1 and USB 2.0 Full Speed compliant
Resolution / Sampling rate
16 / 24bit, 44.1 / 48 / 88.2 / 96kHz
D/A Converter
24bit / 192kHz, 113dB SNR
Headphone Impedance
16~300Ω

Package Contents
- HUD-mini body
- User’s Manual (including warranty)
- USB Cable (USB A to B Type, 1.5M)
- RCA Cable (1.5M)

- Rubber feet (Body Fixing)


Line Out / Headphone Connectors
RCA / Stereo phone & Stereo mini
Digital Out(S/PDIF)
Optical
OS
Windows XP / Vista / Windows 7 / 8,
Mac OS X
Dimension(mm) / Weight
Dimenstion(mm) : 100(W) x 75(D) x 22(H)
Weight : 160g