Evolved to Serve Pro-Audio
Astell&Kern has stayed on the course, offering the truest and most natural sound possible.
The new AK380 offers the most authentic sound from any digital music format with enhanced features that are sought-after by Pro-Audio.
Every bit of the AK380 was designed for Pro-Audio in mind.
The sound that Pro-Audio people have been looking for starts with the AK380.
- 32bit 384kHz Bit to Bit Playback
- Native DSD (up to 11.2 MHz) Playback
- Parametric EQ with 20bands 0.01dB
- 200 Femto Seconds VCXO Reference Clock
- Scalable Amp
- DNLA based AK Connect App
- Metal Touch Sensor Home Button
Metal Touch Sensor
32-bit 384kHz bit-to-bit Playback
All of the AK380’s circuit design including the digital-analog converter (DAC) are ready for
32-bit processing to handle 32-bit music natively.
Other products have traditionally used sample rate converter (SRC) method down sampling for playback. However, the AK380 is capable of playing back 32-bit, 384 kHz original sound without any down sampling.
The result is the AK380 plays up to 32-bit, 384 kHz, any 24-bit music files, or double layer DSD 11.2MHz natively, without conversion or compression.
32-bit bit-to-bit Playback by the AK380
32-bit Playback by Other Products
PEQ (Parametric EQ)
A parametric equalizer (PEQ*1) was implemented in the AK380 to deliver detailed adjustment of
the original sound, and an audio digital signal processor (DSP) was added to aid in this
This frees up CPU cycles previously needed forcalculating graphic equalizers (GEQ), allowing more detailed and accurate calculations via the dedicated DSP.
The audio DSP expands the existing 10-band, ±0.5 dB graphic equalizer (GEQ*2) to 20-band, ±0.01 dB to more precisely adjust the frequency and gain (dB) as well as more accurately specifying the frequency range via Q value adjustments.
* The PEQ supports up to 8 kHz - 192 kHz (8/16/24-bit) formats, but DSD and 32-bit audio are not supported.
AK380 20-band PEQ and AK240 10-band GEQ Frequency Values
What is Parametric Equalization (PEQ*1)?
Parametric equalization refers to the ability to increase or decrease the volume within the Q
A Q value is a frequency range relative to a selected frequency. The frequency range decreases when the Q value increases and vice versa.
What is Graphic Equalization (GEQ*2)?
Graphic equalization divides the audible frequency register into several registers and increases
or decreases the level of each register with a volume slider to adjust the respective
The switches of the volume slider are connected like a graph to visually determine the frequency characteristics, hence the name "graphic equalizer."
Equipped With a Femto Clock to Deliver True Original Sound
Astell&Kern implemented a voltage-controlled crystal oscillator (VCXO) high-precision clock with a reference jitter value of 200 femto seconds*3. Femto clocks are commonly used in high-end audio systems, and the clock is measured in high-precision femtosecond units(one quadrillionth of a second).
What is VCXO?
A VCXO, or a voltage-controlled crystal oscillator, is a type of crystal oscillation device
that creates oscillation frequencies.
External environmental stimuli, which in this case mean voltage inputs, influence the frequency value. Adjustments to the voltage input tunes a precise frequency value.
What is Jitter?
Jitter refers to the undesired deviation in time that occurs in a periodic signal. In this
jitter is the error that occurs in the reference clock required to perform the sampling in
digital audio equipment.
By utilizing a femto clock, the AK380 is able to create a more accurate frequency value and make fine jitter corrections. As a result, the AK380 faithfully reproduces analog sound closer than ever to the original source when transmitting a digital signal as an analog signal.
Pressure-sensitive Metal Capacitive Touch
The AK380 is the first Astell&Kern product to utilize a metal capacitive touch interface. The pressure-sensitive Metal Touch home button responds to fine pressure changes so users operate the device with just a light touch on the metallic pad.
More Expandable Options
The AK380 offers great expandable options through its micro USB connection and balanced out
ports on the bottom of the unit.
The AK380’s functionality is expandable by connecting to a variety of devices. You can increase the output and connect to a greater variety of high-impedance professional headphones through the upcoming AK380 Amp. The AK380 Cradle features balanced output in addition to USB data transfer and charging capabilities, and the AK380 CD-ROM drive rips audio CDs directly to the AK380.
The light and the object are the main theme of the AK380 design.
Any shadow of an object portraits the exact shape from the perspective of the light at that
The way of reproducing the true sound of music from digital formats is quite similar.
Nothing more or nothing less. The design motif of the AK380 reflects our philosophy of music and
Hence, the 'light' and the 'shadows' became the inspiration of the AK380.
The AK380's design was inspired by 'light' and 'shadow'. While the design of the AK240 captured as a moment in time of light and shadow, the AK380 is designed to express the change of time with more angles on its body. You will notice the different angles of surface design as you view the AK380.
We believe that the beauty of the design shall reflect what the AK380 can do with music. As different angles of light casts different shadows, different music will give you a variety of emotions. The AK380’s design was inspired by “light” and “shadow”.
Meteoric Titan, Black
Aircraft Grade Duralumin
4inch WVGA (480 x 800) Touchscreen
Supported Audio Formats
WAV, FLAC, WMA, MP3, OGG, APE(Normal, High, Fast), AAC, ALAC, AIFF, DFF, DSF
PCM : 8kHz ~ 384kHz (8/16/24/32bits per Sample) / DSD Native: DSD64(1bit 2.8MHz), Stereo / DSD128(1bit 5.6MHz), Stereo / DSD256(1bit 11.2MHz), Stereo
Unbalance 2.2Vrms / Balance 2.3Vrms (Condition No Load)
AKM AK4490 x2 (Dual DAC)
Support up to 32bit / 384kHz Bit to Bit Decoding
USB Micro-B input (for charging & data transfer (PC & MAC)) / Connection Mode : MTP (Media Device)
PHONES (3.5mm) / Optical Out (3.5mm) / Balanced Out (2.5mm, only 4-pole supported)
802.11 b/g/n (2.4GHz)
3.14 "(79.8 mm) [W] x 4.42 "(112.4 mm) [H] x 0.70 "(17.9 mm) [D]
8.11 oz (230 g)
Firmware upgrades supported (OTA)
±0.053dB (Condition: 20Hz~20kHz) Unbalance & Balance
±0.56dB (Condition: 10Hz~70kHz) Unbalance / ±0.55dB (Condition: 10Hz~70kHz) Balance
Signal to Noise Ratio
116dB @ 1kHz, Unbalance / 117dB @ 1kHz, Balance
130dB @ 1kHz, Unbalance / 135dB @ 1kHz, Balance
0.0008% @ 1kHz, Unbalance / 0.0007% @ 1kHz, Balance
0.0007% 800Hz 10kHz(4:1) Unbalance / 0.0006% 800Hz 10kHz(4:1) Balance
Balanced out 2.5mm (1ohm) / PHONES 3.5mm (2ohm)
- Frequency Response
Reference Clock Jitter
200 Femto Seconds
- Clock Jitter
3,400mAh 3.7V Li-Polymer Battery
microSD (Max 256GB) x1
- Built-in Memory
Windows XP, Windows 7,8,10 (32/64bit), MAC OS X 10.7 and up
- Supported OS
- Audio was NOT muted during the measurement.
- The image/specification may be changed without notice to improve product performance and quality.