Overview: The Astell & Kern AK100 from iRiver is a portable
high-fidelity audio system, capable of playing Mastering Quality Sound (MQS)--high
resolution digital audio from music mastering studios. It has a sleek, brushed
aluminum body with a 2.4" touch screen display and an analog rotary volume
control on the side. The AK100 has a built-in 32 GB flash memory with dual
microSD slots for adding even more memory. The unit is powered by a built-in
rechargeable battery, and charges via a Micro USB cable. It comes with a cloth
pouch to protect it from scratches.
Digital-to-Analog Converter: The AK100 is equipped with the Wolfson
WM8740 24-bit, 192kHz DAC, the same as found in some high-end audio equipment
(AV receivers). This DAC delivers outstanding performance with a 110dB
signal-to-noise ratio, a super-clean 0.0009% THD+N rate, a -120dB Crosstalk
specification for superb left-right separation, and a 10Hz-20kHz Frequency
Response at +0.02dB to -0.02dB.
External DAC: With Optical In and Optical Out ports, the AK100 can be
used as an external optical DAC. You can connect the unit to an optical out port
on your computer or CD player to convert your digital music files for listening
with headphones, a powered speaker, or through the Auxiliary input of your car
High Fidelity: The AK100 is capable of playing high resolution digital
music up to 24-bit, 192kHz, the same as used in the music mastering process.
This Mastering Quality Sound (MQS) includes all of the high resolution formats,
including WAV, AIFF, FLAC, and ALAC. These lossless files provide approximately
6-1/2 times more detail than a CD (16-bit, 44kHz), and can be played at sample
rates of 8kHz-192kHz and 8/16/24-bits per sample. In addition, the unit can play
MP3, AAC, WMA, OGG, and APE compressed audio files.
Built-in and Optional Memory: The Astell & Kern AK100 is equipped with 32 GB of
internal memory and dual microSD card slots, that support up to 32 GB each. That
gives you a total of 96 GB of storage space that can be used for saving music
files. The microSD slots have a sliding cover to help keep dust out. A microSD
card with sample music is included.
User Interface: The AK100 features a high-quality user interface to
make it easy to find and select your music files, change the volume, and
adjust the sound:
- 2.4" LCD Touchscreen: The full-color LCD touchscreen has a
resolution of 320 x 240 pixels. The screen displays the title and artist of
the currently playing song, along with elapsed and remaining time, with the
album art in the background. On the touchscreen, you can touch the
Play/Pause, Previous/Rewind, or Next/Fast Forward icons to control playback.
You can make adjustments to the EQ, set the repeat and random modes, and add
the song to a playlist, all using the touchscreen interface.
- Rotary Volume Knob: The AK100 has a side-mounted analog-style
rotary volume knob. The volume control range is 00.0 to 75.0 with detents at
every 0.5. As you adjust the volume, the volume range is shown numerically on the display.
- Hardware Control Buttons: There are four physical buttons on the
unit: a top-mounted power button, along with side-mounted Play/Pause,
Previous/Rewind, and Next/Fast Forward buttons.
Drawing Equalizer: The AK100 has a 5-band Equalizer that lets you set
the EQ levels by "drawing" the curve on the touchscreen. You can set the levels
of each band from -10dB to +10dB at 62Hz, 250Hz, 1kHz, 4kHz, and 16kHz. Each
band can be set one at a time by touching the desired level on the screen, or
set them all at once by a single swipe of the finger across the screen in the
shape you desire.
Micro USB: The AK100 has a Micro USB port on the bottom of the unit
for connecting the unit to your computer for downloading music files and for
charging the battery. The AK100 is compatible with Windows XP, Vista, 7 and 8,
as well as Mac OS X 10.6.5 and up.
iRiver Plus4: iRiver Plus4 is an integrated software built into memory
of the AK100 that can be loaded onto your computer when you first connect your
device. With iRiver Plus4, you can rip CDs to your computer and transfer the
music files to the device. You can manage music files using a drag-and-drop
method on the software interface.
Power Requirements: The AK100 is equipped with a 2000 mAh 3.7V
Lithium-Polymer battery. The battery charges via USB in about 5 hours. A fully
charged battery can provide up to 16 hours of continuous playback time
(Standard--Music: FLAC, 16-bit, 44kHz, Volume at 37, EQ off, and LCD off).