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Astell&Kern

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Enjoy The Sound, AK300

  • AK4490
    Single DAC
  • DSD-to-PCM
    Play
  • Parametric EQ
  • 200fs VCXO
    Reference Clock
  • AK Connect
    App
  • Metal Touch
    Sensor
    Home button
  • Metal Body
    (Aluminum)
  • AMP
    (Compatible)
  • Cradle
    (Compatible)
  • CD-RIPPER
    (Support)

Enjoying music

While succeeding the state-of-the-art DAC and scalability as applied to the AK380 and AK320, the latest model has improved accessibility by being priced at a reasonable level.

AK4490’s Single DAC-DAC, DSD-to-PCM Playback, Parametric EQ with 20bands 0.01dB, 200 Femto Second VCXO Reference Clock,
Exceptional Expandability, DLNA-based AK Connect App and Metal Touch Sensor Home Button

AK300 vs. AK320 vs. AK380

AK300 vs. AK320 vs. AK380
  AK300 AK320 AK380
PCM 24bit 192kHz Bit to Bit 24bit 192kHz Bit to Bit 32bit 384kHz Bit to Bit
DSD DSD to PCM DSD to PCM Native DSD Playback
DSD64/128 → PCM 24bit 176kHz DSD64/128 → PCM 24bit 176kHz DSD 2.8MHz (DSD 64) / DSD 5.6MHz (DSD 128) / DSD 11.2MHz (DSD 256)
DAC AK4490 x1 (Single DAC) AK4490 x2 (Dual DAC) AK4490 x2 (Dual DAC)
PEQ Support Support Support
Femto Clock Support Support Support
USB DAC Max 24bit 96kHz (UAC 1.0) Max 24bit 96kHz (UAC 1.0) Max 32bit 384kHz / DSD 11.2MHz (UAC 2.0)
Built-in Memory 64GB 128GB 256GB

24bit 192kHz
bit to bit Playback

AK300 is capable of bit-to-bit playback up to 24bit, 192kHz. 32bit audio is downsampled using a sample-rate converter (SRC).
In addition, DSD 64/128 can be played back via conversion to PCM.

* 32bit, 384kHz is downsampled to 24bit, 192kHz, and 32bit, 352kHz is downsampled to 24bit, 176kHz for playback.
* DSD 64/128 is converted via DSD-to-PCM to PCM 24bit, 176kHz for playback.

32bit SRC
by
the AK300
32-bit MQS
32bit
Delivery
CPU
Conversion
to 24bit
24bit
Delivery
DAC
 
 
DSD-to-PCM
Conversion
by the AK300
DSD 64/128
DSD
Delivery
CPU
DSD-to-PCM
Conversion
PCM
Delivery
DAC
 
 

PEQ (Parametric EQ)

A parametric equalizer (PEQ*1) was implemented in the AK300 to deliver detailed adjustment of the original sound, and an audio digital signal processor (DSP) was added to aid in this process.

This frees up CPU cycles previously needed for calculating 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 AK300’s
PEQ Playback
Using Audio DSP
PCM Sound
Source
Up to 24bit,
192kHz
CPU
 
Audio DSP
Freq./dB Value
Processing
 
32-bit
DAC
 
 
The other Products
GEQ Playback
Using Audio DSP
PCM Sound
Source
PCM
Delivery
CPU
Freq./dB Value
Processing
 
24-bit
DAC
 
 
AK300 20-band PEQ and AK100 10-band GEQ Frequency Values
20-Band PEQ 10-Band GEQ
30Hz
45Hz
60Hz
90Hz
120Hz
180Hz
250Hz
380Hz
500Hz
750Hz
1kHz
1.5kHz
2kHz
3kHz
4kHz
6kHz
8kHz
12kHz
14kHz
18kHz
30Hz
60Hz
120Hz
250Hz
500Hz
1kHz
2kHz
4kHz
8kHz
16kHz

What is Parametric Equalization (PEQ*1)?

Parametric equalization refers to the ability to increase or decrease the volume within the Q value range.
A Q value is a frequency range relative to a selected frequency. The frequency range decreases when the Q value increases and vice versa.

Selected Frequency

Existing EQ value of the
Selected Frequency

Q value setting

Increase the Q value of the
Selected Frequency

Q value setting

Decrease the Q value of the
Selective Frequency

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 frequency’s characteristics.
The switches of the volume slider are connected like a graph to visually determine the frequency characteristics, hence the name ”graphic equalizer.”

AK100 Ⅱ GEQ
AK300 PEQ

Frequency

Gain (-5.0 ~ +5.0) 0.01dB

Q (0.1 ~ 4.0) 0.1dB

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 case, 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 AK300 is able to create a more accurate frequency value and make fine jitter corrections. As a result, the AK300 faithfully reproduces analog sound closer than ever to the original source when transmitting a digital signal as an analog signal.

1fs (Femto Second)*3

1 1

1015 1,000 trillion

==sec.

1ps (Pico Second)

1 1

1012 1 trillion

==sec.

1ns (Nano Second)

11

109 1 Billion

==sec.

AK300 Clock Jitter
Original Clock Jitter Embedded
Clocks the AK300
Clock Jitter
Original Clock Jitter Embedded
Clocks

USB DAC

The AK300 supports USB DAC functionality.

The AK300 can be connected to a PC or Mac via USB for use as a USB DAC that supports PCM/DSD.
When playing back music stored on a PC or Mac, the Single-DAC is able to deliver richer audio of outstanding
soundstage and resolution well beyond the limits of a built-in sound card.

* When using the AK300 as a USB DAC, its PEQ settings are not applied, and output up to 24bit, 96kHz is supported.
* DSD 64/128 is converted via DSD-to-PCM for playback. playback.

PC / MAC

Headphone

Speaker

Car

PCM USB

Line Out

AK Connect App

Astell&Kern has further enhanced DLNA functionality via the AK Connect app.
Wireless networking DLNA (version 1.0) connects to a NAS or PC, and is easily controlled with a smartphone or tablet through AK Connect. Source files on a PC or NAS can be freely transferred and streamed without the hassle of turning on the computer and physically connecting with a cable.

If on the same access point (AP) network, music files on a PC or NAS can be played back via DLNA.

AK500N / SP1000 / AK380 / AK320 / AK300
/ KANN / AK240 / AK120 / AK100 / AK70

DMP

Streaming & Download

DMS

AK300

Phone / Tablet

DMC Streaming DMS
(DMR)
DMS Streaming DMC
(DMR)

Network Player

Streaming DMR DMS
(DMC)
Streaming DMR
Streaming DMR

DMC(DMR)

Streaming & Download

DMS

PC / NAS

DMP (Digital Media Player)
Finds a list of content on a media server for selection and playback.
DMS (Digital Media Server = Network Server)
Actually stores the media content to be shared. When connected to a network, the DMS transmits/ distributes the media content for other devices to stream or download.
DMC (Digital Media Controller)
Finds a list of content on a media server and establishes a connection to a playback-capable device (renderer). By default, a DMC establishes a connection between a media server and media renderer and controls content playback-related operations.
DMR (Digital Media Renderer = Network Player)
Connects to a media server via media controller for content playback.

The AK Connect and AK Connect HD apps Download

The AK Connect and AK Connect HD apps are available for download from the Google Play Store and the Apple App Store.

[Phone] AK Connect

[Tablet] AK Connect HD

Pressure-sensitive
Metal Capacitive Touch

The AK300 features the same metal touch
interface as the AK380 and AK320.

The Metal Touch functions as a home key
and interfaces with the device via
pressure-sensitive touches.

More Expandable Options

The AK300 can be expanded to a variety of devices through the micro-USB and balanced audio out ports located at the bottom of the product.

It can be connected with the AMP as well as professional high-impedance headphones for high output and USB for data transfer and charging.
It can also be connected to the Cradle for balanced audio functionality as well as the CD-RIPPER to conveniently rip audio CDs.

The AK300's First Accessory

AMP

True Recording

Recorder

The AK300’s Bedrock

Cradle

Perfect Extractor

CD-RIPPER