April Music Stello DA100 User Manual

Stello DA100

High-End Digital-to-Analog Converter

(USB input supported)

April Music, Inc.

Thank you for purchasing DA100 digital-to-analog converter.

DA100 is not just an ordinary low-priced DAC in the market but a
simply true high-end audio quality 24 Bit/192 kHz upsampling DAC.
Only the best quality components are used and the world-class
design features which is well known by our legendary DA220 DAC
are adopted in a more compact platform.

DA100 also comes with USB (Universal Serial Bus) standard port for
the wider PC applications.

Try DA100 with any of your digital sources and you will be surprised
how the digital sound can change into so musically involving notes.

DA100 is made especially for you who understand what music means
in our daily lives!

Sit back, relax and enjoy the music!

April Music, Inc

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1. Overview

1) Simply High-End D-A Converter

DA100 is simply a reference-quality high-end digital-to-analog converter
which has adopted the state-of-the-art technologies and tuned for the pure
reproduction of the music. It is not just a DAC but a true high-end solution for
the serious audiophiles.

DA100 is equipped with high performance circuitries like special digital
input receiver, true 192 kHz/24 Bit upsampling, jitter free circuit, AKM4395
DAC Chipset which are used only for the top high-end application, 6th-order
digital filter, and the full discrete class A analog output stage.

These functions are only available for those of DAC with the priced at 4 or 5
times more. DA100 is simply a musically-correct high-end DAC as well as its
super performance guarantees the longer time of enjoyment without any
problems.

2) 4 Digital Inputs including new USB 1.1

DA100 has 4 digital inputs. 1 Coaxial, 2 Optical (Toslink) and it also comes

with one USB (Universal Serial Bus) for PC or Notebook connection.

Just plug your computer to DA100 with included USB cable and you will be
amazed by the dramatic upgrade of sound level from your PC. Even a 1/10
compressed 128k MP3 files can be heard as close as the original WAV files
thanks to a special circuitries only designed for DA100.

Not only music files, but you can also enjoy DVD or any music or movie files
in your computer with high-end quality sound.

You can also connect your Cable TV settop-box, HDTV settop-box or a Game
machine to experience the real dynamics and wide stage as well as the detailed
micro-dynamics which are only possible through the really high priced DAC in
the market.

DA100 is a versatile reference-audio-quality DAC for the variety of
applications.

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3) Premium Quality Components

Most of the components used in DA100 are true high-end audio quality grade.
All the chipsets are first grade including digital receiver, 24 Bit/ 192 kHz
upsampling chip and DAC (120 dB of dynamic range!).

Premium quality capacitors like WIMA polyprophylene and 1% resistors are
used throughout the whole circuits to guarantee the super quality of audio
playback.

Gold plated RCA connectors are specially selected and the switches are all
industrial standard to support the longer life of usage.

Look carefully into the inside of DA100 and you will find out easily why this
unit is sounding so amazing. No gimmicks but genuine components and true
design!

4) Powerful Power Supply

Power supply for DA100 is also specially designed. 25VA custom-made
toroidal power transformer is used for the fluent supply of energy for the
circuitries.

And the regulation circuit has a very low output impedance
(20mΩ@10Khz) to support the high quality of output power supply for the
circuits with its super low hum and riffle characters.

You can easily change supply voltage by selecting the proper one with
a slide switch. From 100~117V to 220~240V/50-60 Hz, you can use DA100 in
any places in the world.

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2. Front Panel

POWER :

Turn the switch lever up to turn on the unit. Red LED will be on to

indicate the DA100 is operating.

UPSAMPLE : You can select either 192kHz/24 Bit upsampling or Bypass.

‘BYPASS’ means the digital output is exactly same as the digital input (up to
96kHz/24 Bit).
You should be the judge to decide which mode is better because the musicality
and nuance vary depending on the recording status of the sources.
Generally, we recommend 192 upsampling for most of the playback.

LOCK : Indicate that the input digital signal has been detected by DA100.

INPUT : Select one input you want to listen out of 4 digital inputs.

1 Coaxial, 2 Optical and 1 USB (Universal Serial Bus) inputs are supplied.

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