Digital Audio Player AK240 SS 4
Digital Audio Player AK240 SS 3Digital Audio Player AK240 SS 2Digital Audio Player AK240 SS 1

Digital Audio Player Astell&Kern AK240SS (Stainless Steel)

The Astell and Kern AK240ss is the Stainless Steel version of the Astell and Kern AK240 and gives an even more stunning sonic performance

Product Description

The unwavering strength of stainless steel.

At Astell&Kern, they study countless materials to remain faithful to our design philosophy: Deliver the unique beauty and pure essence of the raw material intact without needless processing.

“A pure, perfect metal that requires no processing unlike alloys mixed with different metals.”
“A strong, non-corrosive metal that does not easily bend or damage.”
“A metal that can restore damage through polishing.”
This type of metal is already widely used on high-end timepieces.Unlike the previous iterations that employed duralumin, the Astell&Kern AK240SS is constructed with stainless steel to take full advantage of its inherent benefits. Due to the extremely difficult processing techniques and high costs when compared to aluminum, stainless steel is generally reserved to high-end timepieces. We at Astell&Kern have created the most special version of the AK240 to date using stainless steel to bring you only the best.
The clear sound of stainless steel.
One aspect of Hi-Fi and car audio absolutely cannot be overlooked. The ground eliminates noise that is inevitably generated by electrical signals in all products with electric circuits. Because the ground is one of the factors that can dramatically affect sound, it must not be neglected in Hi-Fi audio equipment such as the AK240.
The standard AK240 utilized an anodized duralumin body with a few ground points applied via laser etching.On the contrary, the AK240SS takes advantage of the entire pure stainless steel body as ground for a marked improvement in sound quality over the previous iteration through more ground points on a wider area.Without any changes to the hardware or firmware, you will be able to experience a clearer, more focused sound previously unheard in the standard AK240.

The AK240 Features
After successfully launching the AK100 and the AK120 models, Astell & Kern wondered, “What is the ultimate sound quality?” After much consideration, they decided to move a step further with the goal, which is to deliver the sound “exactly as the artist had intended” for us to hear. Moving from the AK100 to AK120, Astell & Kern decided to provide a Dual DAC setup to create better left and right channel separation with clearer sound quality. 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, Astell & Kern 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, Astell & Kern can dare say that they have gotten “that much closer” to the sound quality of the original recording.

General Specifications
  • Aircraft Grade Duralumin
  • 3.31inch WVGA (480 x 800) AMOLED Touchscreen
  • WAV, FLAC, WMA, MP3, OGG, APE(Normal, High, Fast), AAC, ALAC, AIFF, DFF, DSF
  • FLAC, WAV, ALAC, AIFF : 8kHz ~ 192kHz (8/16/24bits per Sample)
    / DSD Native : DSD64 (1bit 2.8MHz), Stereo / DSD128 (1bit 5.6MHz), Stereo
  • Unbalance 2.1Vrms / Balance 2.3Vrms (Condition No Load)
  • Cirrus Logic CS4398 x2 (Dual DAC)
  • Support up to 24bit/192kHz Bit to Bit Decoding, DSD64/128
  • USB Micro-B input (for charging & data transfer (PC & MAC))
    / Connection Mode : MTP (Media Device)
  • PHONES (3.5mm) / Optical Out (3.5mm) / Balanced Out (2.5mm, only 4-pole supported)
  • 802.11 b/g/n (2.4GHz)
  • V4.0
  • 2.59 ”(66 mm) [W] x 4.21 ”(107 mm) [H] x 0.68 ”(17.5 mm) [D]
  • 6.5 oz (185 g)
  • Firmware upgrades supported (OTA)
Audio Performance
  • Frequency Response – ±0.023dB (Condition: 20Hz~20kHz) Unbalance & Balance
  •  – / ±0.3dB (Condition: 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)
Clock source
  • Clock Jitter – 50ps (Typ)
  • Capacity – 3,250mAh 3.7V Li-Polymer Battery
  • Built-in Memory – 256GB [NAND]
  • External Memory – microSD (Max 128GB) x1

Additional Information

Weight 1 kg
Dimensions 30 x 30 x 10 cm


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