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Astell & Kern AK380 Portable Media Player

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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.

32bit 384kHz Bit to Bit Playback, Native DSD (up to 5.6 MHz) Playback, Parametric EQ with 20-band 0.1dB,

200 Femto Second VCXO Reference Clock, Scalable Amp, DNLA-based AK Connect App, Metal Touch Sensor Home Button

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.

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 5.6MHz natively, without conversion or compression.

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, ±0.1 dB to more precisely adjust the frequency and gain (dB) as well as more accurately specifying the frequency range via Q value adjustments.

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."

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.

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.

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.

General Specifications
Model AK380
Body Color Meteoric Titan
Body Material Aircraft Grade Duralumin
Display 4inch WVGA (480 x 800) Touchscreen
Supported Audio Formats WAV, FLAC, WMA, MP3, OGG, APE(Normal, High, Fast), AAC, ALAC, AIFF, DFF, DSF
Sample rate PCM : 8kHz ~ 384kHz (8/16/24/32bits per Sample) / DSD Native: DSD64(1bit 2.8MHz), Stereo/ DSD128(1bit 5.6MHz), Stereo
Output Level Unbalance 2.2Vrms / Balance 2.3Vrms (Condition No Load)
DAC AKM AK4490 x2 (Dual DAC)
Decoding Support up to 32bit / 384kHz Bit to Bit Decoding
Input USB Micro-B input (for charging & data transfer (PC & MAC)) / Connection Mode : MTP (Media Device)
Outputs PHONES (3.5mm) / Optical Out (3.5mm) / Balanced Out (2.5mm, only 4-pole supported)
Wi-Fi 802.11 b/g/n (2.4GHz)
Bluetooth V4.0 (A2DP, AVRCP)
Dimensions 3.14 ”(79.8 mm) [W] x 4.42 ”(112.4 mm) [H] x 0.70 ”(17.9 mm) [D]
Weight 8.11 oz (230 g)
Feature Enhancements Firmware upgrades supported (OTA)
Audio Performance
Frequency Response ±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
Crosstalk 130dB @ 1kHz, Unbalance / 135dB @ 1kHz, Balance
THD+N 0.0008% @ 1kHz, Unbalance / 0.0007% @ 1kHz, Balance
IMD SMPTE 0.0007% 800Hz 10kHz(4:1) Unbalance / 0.0006% 800Hz 10kHz(4:1) Balance
Output Impedance Balanced out 2.5mm (1ohm) / PHONES 3.5mm (2ohm)
Clock source
Clock Jitter 30ps(Typ)
Reference Clock Jitter 200 Femto Seconds
Battery
Capacity 3,400mAh 3.7V Li-Polymer Battery
Memory
Built-in Memory 256GB [NAND]
External Memory microSD (Max 128GB) x1
OS
Supported OS Windows XP, Windows 7,8 (32/64bit), MAC OS X 10.7 and up

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Astell & Kern AK380 Portable Media Player




Nintronics offers generous trade in prices to help make your next upgrade as seamless as possible, while greatly reducing the overall price of your purchase. Depending upon the items involved, Nintronics will be happy to send out one of our nationwide installation engineers to collect your traded in items and unbox, setup and calibrate your new equipment.

Astell & Kern AK380 Portable Media Player

"Please include age, condition, make, model and serial numbers of the units you wish to trade in. Please note if you have the original accessories, boxes, invoice etc... This will help with increasing your trade in value."




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