[DEMO SET] Astell&Kern iRiver AK320 High-Resolution Digital Audio Player with AK320 AMP


No Warranty

The demo units are in perfect operating condition. Sales on demo units are FINAL and CANNOT be returned.

Astell&Kern iRiver AK320 High-Resolution Digital Audio Player

The primary goal of Astell&Kern has always been to deliver the original sound and we believed that the AK380 did just that. We wanted even more people to experience the AK320 and its ability to deliver the original sound as intended.
 
24bit 192kHz bit to bit Playback
 
AK320 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.
 
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 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 PEQ supports up to 8 kHz - 192 kHz (8/16/24-bit) formats, but DSD and 32-bit audio are not supported.
 
USB DAC
 
The AK320 supports USB DAC functionality. The AK320 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 Dual-DAC is able to deliver richer audio of outstanding soundstage and resolution well beyond the limits of a built-in sound card.
 
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 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.
 
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.
 
DMP (Digital Media Player)
Finds a list of content on a media server for selection and playback.

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.

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.

DMR (Digital Media Renderer = Network Player)
Connects to a media server via media controller for content playback.
 
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.
 

Key Features

  • Dual AKM AK4490 DAC (Dual DAC)
  • DSD Playback to PCM Conversion up to 5.6 mHz
  • Exceptional Expandability - AK Amp, PEM13 Cradle
  • 128GB Internal Flash Memory + Single MicroSD Memory Card Slot (256GB)
  • Bit-to-Bit High Resolution PCM Audio Playback up to 32bit/382kHz

Key Specifications

  • Dimensions: 75 mm x 16 mm x 112 mm
  • Built-in Wi-Fi for streaming and downloading music from a networked computer via DLNA
  • Digital music player plays MP3, FLAC, WAV, ALAC, Ogg Vorbis, AAC, AIFF, APE, WMA, DFF, DSF

Astell&Kern iRiver AK320 AMP Portable Amplifier

Astell&Kern iRiver AK320 Portable Amplifier is having both excellent conductivity and specific gravity in the body material, the sound of excellent balance with a sense of depth and a sense of weight and possible by the acoustic properties of the copper. 

3,400 mAh Large-capacity Battery
 
An amplifier, which increases audio output, consumes a great amount of energy. Thus, the AK320 AMP features a 3,400 mAh large-capacity battery – identical to the one in the AK320 itself - to support up to nine hours of continuous unbalanced-output playback.
 
High Gain
 
The AK320 AMP supports 8.1 VRMS output when connected via high-gain balanced output. High-gain output is four times greater than low-gain output and supports high-impedance headphones. To protect earphones/headphones during high output, the volume is automatically adjusted when the amp is powered on or the earphones/headphones are disconnected. Furthermore, the gain can be easily adjusted via the AK320's settings.
 
Integrated Design
 
The AK320 AMP was designed as an extension of the light and shadow theme of the AK320. Continuing this design concept, the AK320 AMP retains the subtle changes and details in the emitted brilliance as light flows across its surface. The diamond pattern engraved into the volume wheel of AK320 is repeated on the amplifier's rear light for design continuity. The area of the amplifier in contact with the AK320's volume wheel reproduces the design's angle of reflection for comfortable wheel operation. The amplifier's light shining delicately through the gaps in the reflected surface visually accentuate the music’s mystique. Unlike conventional amplifiers, the AK320 AMP was designed from the ground up as a single entity when combined with the AK320. The wheel on the rear of the amplifier that connects the two devices is a representation of the volume wheel seen throughout Astell&Kern products and expresses our unique design identity.
 

Key Features

  • Charging: AK320 + AK320 AMP simultaneous charging
  • Connections: Easy connection using a Screw Cap
  • Volume control: Integrated volume control using the AK320

Key Specifications

  • Expansion-type amplifier with design unity
  • 3,400 mAh large-capacity battery
  • 8.1 VRMS high-gain balanced output
  • 4.1 VRMS unbalanced output
  • Output Level: [Low Gain] Unbalanced 2.1 VRMS / Balanced 2.1 VRMS (Condition: No Load) [High Gain] Unbalanced 4.1 VRMS / Balanced 8.1 VRMS (Condition: No Load)
  • Input: Type-B micro-USB Input (Charging & data transfer (PC & Mac))/ Connection Mode: MTP (Media Device)
  • Outputs: PHONES (3.5mm) / Balanced Out (2.5mm, only 4-pole supported)
  • Dimensions: 80.7 mm x 128.4 mm x 10.3 mm

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