• AK240

'Be The Ultimate, AK240'


We thought that the Dual DAC setup would be enough, but while developing the AK240, we felt the need to further improve sound quality in order to accurately reproduce the original sound recording.


After countless hours of research and testing, we were able to find the answer. The answer was to create both a balanced output and native DSD playback through the Dual DAC setup.


Now with the AK240, we can dare say that we have gotten “that much closer” to the sound quality of the original recording.


Features :


- Native DSD Support


The process of setting up Native DSD support was not an easy task.


Since the main CPU does not process Native DSD, we needed a chip that will work with it.


It took us a long time, but we made it work.


Through countless hours of testing, we were able to achieve Native DSD playback by having the main CPU process the data, send it to the exclusive XMOS chip, then through the DAC to deliver the sound.


- Unbalanced vs. Balanced Output


The unbalanced method is the most commonly used basic method which consists of “left and right signals + ground line”.


This setup includes a ground line which blocks out external noises from the outside.


However, since the ground line cannot block out all of the external noises completely, external noises can be mixed into the signals that are transmitted, which then result in changes to the sound.


The longer the signals travel, the more external noises that will be mixed into the sound which is why it is used within a short distance of 1 to 2 meters.


Unlike the unbalanced method, the balanced method has an additional cold signal to compliment the hot signal which reduces the external noises.


The balanced method has a few advantages over the unbalanced method.


The first advantage is that the hot signal and the cold signal will remove the external noises received.


The second advantage is increased output due to the 2 transmitted signals.


Since the ground line cannot block out 100% of the external noises, noise will appear on both the hot and cold signals.


The alignment of the 2 signals allows the noise to usually appear at similar points where they will eventually be removed as the signals are transmitted.


- Dual DAC meets Balanced Output


It did not take us long to figure out that the AK240’s Dual DAC and balanced output resulted in the best sound.


- 384 GB of Massive Storage


In order to support Native DSD, MQS, and massive audio files, we had to come up with the ultimate portable music player with 256GB of storage.


With 256GB of internal memory, about 2,500 MQS (24bit/96kHz, 4 minute-long, 90MB) songs can be saved.


With the addition of a 128GB micro SD card, the AK240 can support up to a total memory capacity of 384GB


Specifications :


- Body Color : Gun Metal


- Body Material : Aircraft Grade Duralumin


- Display : 3.31inch WVGA (480 x 800) AMOLED Touchscreen


- 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


- Output Level : Unbalance 2.1Vrms / Balance 2.3Vrms (Condition No Load)


- DAC : Cirrus Logic CS4398 x 2 (Dual DAC)


- Decoding : Support up to 24bit/ 192kHz Bit to Bit Decoding


- Input : USB Micro-B input


- 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


- Dimensions : 2.59 ”(66 mm) [W] x 4.21 ”(107 mm) [H] x 0.68 ”(17.5 mm) [D]


- Weight : 6.5 oz (185 g)


- Feature Enhancements : Firmware upgrades supported (OTA)


- Output Impedance : Balanced out 2.5mm (1ohm) / PHONES 3.5mm (2ohm)


- Clock Jitter : 50ps (Typ)


- Battery Capacity : 3,250mAh 3.7V Li-Polymer Battery


- Built-in Memory : 256GB


- External Memory : microSD (Max 128GB) x1


- Supported OS : Windows XP, Windows 7,8 (32/64bit), MAC OS X 10.7 and up

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AK240

  • Product Code: AK240
  • Availability: Pre-Order
  • Rp.35,999,000


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Tags: AstellnKern, DSD, Balanced