AK240
The AK240 is a portable digital audio player with a dual-DAC design, a balanced 2.5mm output and native DSD playback. It is aimed at listeners who carry high-resolution music files and want a one-piece metal player with a 3.31-inch touchscreen and 256GB of built-in storage.
- Dual Cirrus Logic CS4398 DACs
- Native DSD64 and DSD128 playback
- 2.5mm balanced and 3.5mm unbalanced outputs
- 3.31-inch AMOLED touchscreen
- 256GB built-in memory plus microSD
- USB DAC mode with DoP; OTA firmware updates
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The AK240 is a portable music player built around two Cirrus Logic CS4398 DAC chips, which keep the left and right channels separate. A dedicated XMOS chip handles DSD data, so DSD64 and DSD128 files play natively and are not converted to PCM. PCM formats such as FLAC, WAV, ALAC and AIFF are supported up to 24-bit/192kHz.
The player has a 3.31-inch AMOLED touchscreen, a ten-band equaliser with 0.5dB steps and storage for custom EQ presets. It holds 256GB internally, and a microSD slot adds more. Firmware can be updated over Wi-Fi (OTA). The body is made of aircraft-grade duralumin in a Gun Metal colour.
Headphones connect to the 3.5mm output or the 2.5mm four-pole balanced output. A 3.5mm optical output is also fitted. A USB Micro-B port handles charging and file transfer with a computer, and it lets the player work as a USB DAC with native DSD over DoP. The equaliser is not available in USB DAC mode.
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Specifikacije
- Znamka
- Astell&Kern
- Model
- AK240
- Kategorija
- Hi-Fi in domači avdio › Predvajalniki
General
- Model
- AK240
- Body color
- Gun Metal
- Body material
- Aircraft Grade Duralumin
- Display
- 3.31inch WVGA (480 x 800) AMOLED Touchscreen
- Firmware upgrades
- Supported (OTA)
Audio
- DAC
- Cirrus Logic CS4398 x2 (Dual DAC)
- Supported audio formats
- WAV, FLAC, WMA, MP3, OGG, APE(Normal, High, Fast), AAC, ALAC, AIFF, DFF, DSF
- Sample rate
- FLAC, WAV, ALAC, AIFF : 8kHz ~ 192kHz (8/16/24bits per Sample) / DSD Native : DSD64 (1bit 2.8MHz), Stereo / DSD128 (1bit 5.6MHz), Stereo
- Decoding
- Support up to 24bit/192kHz Bit to Bit Decoding, DSD64/128
- Clock jitter
- 50ps (Typ)
Audio performance
- Output level
- Unbalance 2.1Vrms / Balance 2.3Vrms (Condition No Load)
- Frequency response
- ±0.023dB (20Hz~20kHz) Unbalance & Balance / ±0.3dB (10Hz~70kHz) Unbalance & Balance
- Signal to noise ratio
- 116dB @ 1kHz, Unbalance / 117dB @ 1kHz, Balance
- Crosstalk
- 130dB @ 1kHz, Unbalance / 135dB @ 1kHz, Balance
- THD+N
- 0.0007% @ 1kHz, Unbalance / 0.0005% @ 1kHz, Balance
- IMD SMPTE
- 0.0004% 800Hz 10kHz(4:1) Unbalance / 0.0003% 800Hz 10kHz(4:1) Balance
- Output impedance
- Balanced out 2.5mm (1ohm) / PHONES 3.5mm (2ohm)
Inputs and outputs
- 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)
Connectivity
- Wi-Fi
- 802.11 b/g/n (2.4GHz)
- Supported OS
- Windows XP, Windows 7,8,10 (32/64bit), MAC OS X 10.7 and up
Storage and power
- Built-in memory
- 256GB [NAND]
- External memory
- microSD (Max 256GB) x1
- Battery
- 3,250mAh 3.7V Li-Polymer Battery
Physical
- Dimensions
- 2.59 in (66 mm) [W] x 4.21 in (107 mm) [H] x 0.68 in (17.5 mm) [D]
- Weight
- 6.5 oz (185 g)