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Astell&Kern

Astell&Kern’s new KANN MAX high-resolution digital audio player achieves a higher power output in a more compact design

Astell&Kern, the global leader in premium portable high-resolution audio devices, reveals the KANN MAX portable digital audio player (DAP), the 4th model in its acclaimed KANN series. Adored by audiophiles all over the world for its performance focused on high output and ultra-clear sound, the KANN MAX achieves a higher power output (15Vrms) than its award-winning predecessor, theKANN ALPHA.

By applying advanced design and audio technology, this newfound power is also housed in a more compact and lightweight chassis. The result is an even wider variety of headphones, including sophisticated high impedance models, can be optimally driven without the need for additional amplification. Music fans can experience the original studio-quality sound without compromise – anywhere, anytime.

Astell&Kern KANN MAX key features at a glance:

  • Features 4-step gain level with maximum 15Vrms output to support a wider variety of headphones without distortion
  • Innovative circuit design with ultra-high output and low noise in an even smaller-sized player
  • Equipped with ESS ES9038Q2M Quad-DAC for exceptionally clear and balanced sound
  • Features proprietary TERATON ALPHA Sound Solution technology
  • Supports playback of high-resolution digital audio files up to 32-bit 768 kHz/Native DSD512
  • Bluetooth 5.0 and 24-bit wireless codec (aptX™ HD, LDAC) support
  • Replay Gain function uniformly adjusts volume playback from sound sources up to 24-bit/192 kHz.

Innovative circuit design = low noise levels

As the power output increases, so does the noise level that adversely effects the audio performance. Through innovative integrated circuit design, Astell&Kern is able to achieve a low noise-level while hitting the new 15Vrms ‘Super’ output setting.

First, an analogue volume controller is applied to deliver a rich dynamic range without any loss. Next, the power supply integrated circuit for each audio section (divided into DAC, volume, and amp) is separately configured so the interference ripple noise caused by the DC-DC power supply (the shaking noise phenomenon that occurs when power is supplied) is removed. Audio noise that can be heard amplified like audio sound in the operational amp is also minimised. Lastly, by dividing a printed circuit board (PCB) the same size as the larger KANN ALPHA into 12 layers, the smaller physical size of the KANN MAX is achieved.

Quad DAC and playback

The KANN MAX is the first player in the KANN series to be equipped with four ES9038Q2M DACs for a high-output performance. By employing Quad DACs – one DAC can each be fully allocated to four individual amp channels – the depth and realism of the sound source can be expressed to the fullest.

Combined with Astell&Kern’s amplifier circuit technology that naturally and delicately raises the strengths of the DAC, its precise decoding capabilities delivers the original studio-quality sound without distortion.

The KANN MAX also plays files up to 32-bit/768kHz PCM and native DSD512, while supporting 2.5mm, 3.5mm and 4.4mm headphones connections for accommodating a greater variety of headphones and in-ear monitors (IEM). In order to minimise contact noise from the output jacks, a gold PVD coating method is applied to the headphone connector instead of the typical rings employed by other products. This improves both design and function.

The KANN MAX also adds Replay Gain functionality to the mix. This automatically and uniformly adjusts volume playback from sound sources up to 24-bit/192 kHz so playlists can be enjoyed throughout without reaching for the volume.

KANN MAX featuring TERATON ALPHA technology

The result of extensive research and development, Astell&Kern’s patented TERATON ALPHA Sound Solution is designed to deliver audio playback close to the original sound.  It effectively removes power noise and provides efficient power consumption and amplification right through to the audio output interface stage where the digital-to-analogue signal conversion (DAC) takes place – audio technology Astell&Kern has consistently developed and perfected over the years.

Connectivity

A BT Sink function connects the KANN MAX to an external device, such as a smartphone, via Bluetooth, enabling music to be played back in high-quality on the player. Elsewhere the KANN MAX boasts Bluetooth® 5.0, providing greater range and a more stable wireless connection to headphones and, along with support for 24-bit aptX™ HD and LDAC codecs, offers the best possible wireless sound quality.

Alongside Wi-Fi support, the KANN MAX features AK File Drop for easier wireless file transfers. Users can wirelessly transfer files through a PC, smartphone, or FTP program located on the same network to make music management even more convenient.

Battery and storage

Although smaller in size, all power-related components and the power circuit been developed to achieve 13 hours of continuous playback. The KANN MAX harbours 64GB on-board memory that can be expanded up to 1TB via a microSD card slot, meaning users can carry thousands of hi-res albums with them at all times.

Powerful streamlined design

Continuing the bold design concept of the KANN series, this player boasts a more streamline profile, emphasised by the hexagonal top line that narrows sharply from the bottom up, and the hairline treatment on the back that expresses both a sense of speed and power.

The Astell&Kern KANN MAX is priced £1,199 / $1,300 / €1,499 and is available mid-June 2022 from www.astellkern.co.uk

The Astell&Kern KANN MAX cases come in three colours: black, blue and beige, priced £109 / $110 / €129 and are mid-June 2022 from www.astellkern.co.uk

General Specifications

Body Colour: Anthracite Gray

Body Material: Aluminium

Display: 4.1-inch, 720 x 1280 touch screen

Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF

Sample Rate:

  • PCM: 8kHz ~ 768kHz (8/16/24/32bits per Sample)
  • DSD Native: DSD64 (1bit 2.8MHz), Stereo / DSD128 (1bit 5.6MHz), Stereo / DSD256 (1bit 11.2MHz)
  • DSD512(1bit, 22.4MHz) Stereo

Output Level:

  • [Low] Unbalanced 2Vrms / Balanced 4Vrms (Condition No Load),
  • [Mid] Unbalanced 4Vrms / Balanced 8Vrms (Condition No Load),
  • [High] Unbalanced 6Vrms / Balanced 12Vrms (Condition No Load),
  • [Super] Unbalanced 8Vrms / Balanced 15Vrms (Condition No Load)

CPU: Quad-core

DAC: ESS ES9038Q2M x4 (Quad-DAC)

Decoding: Supports up to 32-bit/768kHz Bit-to-Bit Playback

Input: USB Type-C input (for charging & PC & MAC)

Outputs:

  • Unbalanced Out (3.5mm), Optical Out (3.5mm)
  • Balanced Out (2.5mm, only 4-pole supported | 4.4m, only 5-pole supported)

Wi-Fi: 802.11 b/g/n (2.4GHz)

Bluetooth: V5.0 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC)

Dimensions: 2.68-inches (68.3mm)[W] x 4.6-inches (117mm)[H] x 0.92-inches (23.6mm)[D]

Weight: about 10.76oz (305g)

Feature Enhancements: Firmware upgrade supported (OTA)

Audio specifications*

Frequency Response:

  • ±0.023dB (Condition: 20Hz~20kHz) Unbalanced / ±0.026dB (Condition: 20Hz~20kHz) –
  • Balanced
±0.035dB (Condition:20Hz~70kHz) Unbalanced / ±0.072dB (Condition: 20Hz~70kHz) Balanced

S/N:

  • 114dB @ 1kHz, Unbalanced
  • 115dB @ 1kHz, Balanced

Crosstalk:

  • -124dB @ 1kHz, Unbalanced
  • -135dB @ 1kHz, Balanced

THD+N:

  • 0.0003% @ 1kHz, Unbalanced
  • 0.0004% @ 1kHz, Balanced

IMD SMPTE:

  • 0.0007% 800Hz 10kHz (4:1) Unbalanced
  • 0.0007% 800Hz 10kHz (4:1) Balanced

Output Impedance:

  • Unbalanced Out 3.5mm (1ohm)
  • Balanced Out 2.5mm (1.6ohm), 4.4mm (1.6ohm)

Clock Jitter: 25ps (Typ)

Reference Clock Jitter: 70ps

*Audio specifications based on Low Gain.

Storage capacity

Built-in Memory: 64GB [NAND]

External Memory: microSD x1 (Max. 1TB)

Battery

Capacity: 5,600mAh 3.8V Li-Polymer

Charge Time: about 3.5 hours (9V 1.67A Fast Charging) | 5.5hours (5V 2A General Charging)

Playback Time: about 13 hours (Standard: FLAC, 16bit, 44.1kHz, Unbalanced, Vol.40, LCD Off, LED On, Low Gain)

Supported OS: Windows 7,8,10(32/64bit) MAC OS X 10.7

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Astell&Kern’s new SEM4 DAC module for the A&futura SE180 music player features upsampling technology for an enhanced sonic performance

Astell&Kern, the global leader in premium portable high-resolution audio devices, introduces the SEM4 DAC module for its award-winning A&futura SE180 digital audio player (DAP). The fourth module in the series, this dual-DAC is the first to feature Digital Audio Remaster (DAR) upsampling technology, enhancing the sample rate of the audio source so music fans can get closer to the analogue-like original sound.

The A&futura SE180, an IF Design Award Winner 2022 and the first Astell&Kern player to boast interchangeable all-in-one DAC modules, allows music fans to customise their sound with different audio-flavoured DACs to find the hi-fi-grade sonics that suit them.

Astell&Kern SEM4 DAC module key features at a glance:

  • Equipped with an Asahi Kasei AK4493SEQ dual DAC for more natural playback
  • Specially developed Digital Audio Remaster (DAR) upsampling technology enhances sample rate and sound quality up to a maximum PCM rate of 384 kHz/DSD256
  • Features proprietary TERATON ALPHA Sound Solution technology
  • Supports play of up to 32-bit 768 kHz/Native DSD512 high-resolution digital audio files
  • Low-power consumption design provides 14 hours of playback

Introducing Digital Audio Remaster (DAR)

Specially developed for the SEM4, DAR upsamples the sound source up to a maximum PCM sample rate of 384 kHz/DSD256. Whatever file you are playing, the SEM4 will convert to a higher sample rate that suits the source. The result will be a more refined and richer sonic performance, revealing detail and nuances in your favourite music otherwise unheard.

The SEM4 Digital Audio Remaster upsampling guide:

Maximum upsampling PCM rate:

  • 44.1kHz range PCM will be converted to 352.8kHz for playback
  • 48kHz range PCM will be converted to 384kHz for playback
  • No conversion will be made when playing DSD with this option selected

Maximum DSD upsampling rate:

  • PCM files lower than 96kHz will be converted to DSD128 for playback 
  • PCM files over 96kHz will be converted to DSD256 for playback 
  • DSD files below DSD256 will be converted to DSD256 for playback with this option selected

Asahi Kasei AK4493SEQ dual DAC with VELVET SOUND™  

The SEM4 is the first Astell&Kern product to be equipped with a premium dual AK4493SEQ DAC from Asahi Kasei. Featuring VELVET SOUND™ technology, this DAC aims to deliver a more natural audio with even lower noise and distortion, along with a wider dynamic range. Carefully selected advanced switch and capacitor components allows the low-power consumption design to provide a stunning low-noise playback performance of up to 14 hours – the longest among SE180 modules.

SEM4 featuring TERATON ALPHA technology

The result of extensive research and development, Astell&Kern’s patented TERATON ALPHA Sound Solution is designed to deliver audio playback close to the original sound.  It effectively removes power noise and provides efficient power consumption and amplification right through to the audio output interface stage where the digital-to-analogue signal conversion (DAC) takes place – audio technology Astell&Kern has consistently developed and perfected over the years.

Meet the Astell&Kern A&futura SE180 DAC Module Family

The SEM4 is the fourth in a series of DAC modules exclusively designed for the premium Astell&Kern A&futura SE180 portable digital audio player. Each DAC module offers different sonic characteristics to suit the music you love. All modules support 2.5mm, 3.5mm and 4.4mm headphones connections for accommodating a greater variety of headphones and in-ear monitors (IEM)

  • SEM1 ESS ES9038PRO (supplied with the SE180 player)
  • SEM2 Asahi Kasei AK4497EQ Dual DAC
  • SEM3 ESS ES9038Q2M Quad DAC
  • SEM4 Asahi Kasei AK4493SEQ Dual DAC

The optional Astell&Kern SEM4 DAC (Asahi Kasei AK4493SEQ Dual DAC Module) is priced £369 / $400 / €429 and will be available from May from www.astellkern.co.uk

The Astell&Kern A&futura SE180 (with SEM1 ESS ES9038PRO DAC module) is priced £1,399 / $1,499 / €1,599 and is available now from www.astellkern.co.uk

Technical Specifications

Body Material: Aluminum, Stainless Steel, Polycarbonate

Body Colour: Moon Silver

Sample Rate:

  • PCM: 8kHz ~ 768kHz (8/16/24/32bits per Sample)
  • DSD Native: DSD64(1bit 2.8MHz), Stereo / DSD128(1bit 5.6MHz), Stereo
  • DSD256(1bit 11.2MHz), Stereo / DSD512(1bit 22.4MHz), Stereo

Outputs: Unbalanced Out (3.5mm), Balanced Out (2.5mm, only 4-pole supported / 4.4m, only 5-pole supported)

Output Level:

  • [Normal Gain] Unbalanced 2Vrms / Balanced 4Vrms (Condition No Load)
  • [High Gain] Unbalanced 3Vrms / Balanced 6Vrms (Condition No Load)

DAC: AKM AK4493SEQ x 2 (Dual DAC)

Decoding: Support up to 32bit / 768kHz Bit-to-Bit playback

Dimensions: 3.03″(77mm)[W] x 2.99″(76mm)[H] x 0.78″(19.9mm)[D]

Weight: 90g (3.17oz)

Playback Time: about 14hours (Standard: FLAC, 16bit, 44.1kHz, Unbalanced, Vol.50, LCD Off)

Audio Specifications

Frequency Response:

  • ±0.09dB (Condition: 20Hz~20kHz) Unbalanced / ±0.04dB (Condition: 20Hz~20kHz) Balanced
  • ±0.65dB (Condition: 20Hz~70kHz) Unbalanced / ±0.65dB (Condition: 20Hz~70kHz) Balanced

S/N:

  • [Normal Gain] 121dB @ 1kHz, Unbalanced / 121dB @ 1kHz, Balanced
  • [High Gain] 125dB @ 1kHz, Unbalanced / 125dB @ 1kHz, Balanced

Crosstalk

  • [Normal Gain] -134dB @ 1kHz, Unbalanced / -138dB @ 1kHz, Balanced
  • [High Gain] -135dB @ 1kHz, Unbalanced / -143dB @ 1kHz, Balanced

THD+N

  • [Normal Gain] 0.0003% @ 1kHz, Unbalanced / 0.0004% @ 1kHz, Balanced
  • [High Gain] 0.0005% @ 1kHz, Unbalanced / 0.0006% @ 1kHz, Balanced

IMD SMPTE: 0.0003%, 800Hz 10kHz (4:1), Unbalanced / 0.0003%, 800Hz 10kHz (4:1), Balanced

Output Impedance: 3.5mm (1ohm) / 2.5mm (1.5ohm) / 4.4mm (1.5ohm)

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Head-Fi Hero: Astell&Kern ACRO CA1000 redefines the headphone amplifier with digital audio player capabilities

Astell&Kern, the global leader in premium high-resolution audio devices has redefined the headphone amplifier with the introduction of the ACRO CA1000. Expertly combining high-performance amplifiers with digital audio player (DAP) capabilities in an incredibly compact desktop and carriable-friendly form, the powerful ACRO CA1000 delivers the optimal performance from any type of wired headphone. An array of digital/analogue inputs and outputs also ensures the ACRO CA1000 can be at the heart of any hi-fi set-up and become the ultimate system for head-fi fans. This system represents Astell&Kern’s fundamental philosophy of delivering as close to the original sound as possible and enriching the listening experience.

Astell&Kern ACRO CA1000 key features at a glance:

  • Powerful headphone amplifier with digital audio player capabilities.
  • Features a four step Gain Level that drives high impedance headphones with a 15Vrms output or below.
  • Features 3.5mm, 6.35mm unbalanced, and 2.5mm 4.4mm balanced headphone output to handle a wide variety of headphones.
  • An array of digital/analogue inputs and outputs ensures it can at the heart of any hi-fi set-up.
  • Onboard ESS ES9068AS Quad-DAC delivers a clear, detailed and balanced sound.
  • Supports high-resolution audio playback up native DSD512 and 32bit/384 kHz.
  • Crossfeed reduces listening fatigue by creating a more natural sound akin to listening to speakers.
  • Boasts Astell&Kern’s patented TERATON ALPHA Sound Solution technology.
  • A 4.1-inch, 720 x 1280px touchscreen tilts up to 60 degrees for easy control.
  • Support for Bluetooth® 5.0 provides greater range and a more stable wireless connection.
  • Support for 24-bit aptX™ HD and LDAC codecs, offers the best possible wireless sound quality.
  • Built-in battery provides up to 10.5 hours playback.

Headphone amp

To realise any hidden potential and run the most sophisticated and power-hungry headphones a dedicated amplifier is essential. The ACROCA1000 supports a four-step Gain Level setting that can run high-impedance headphones with a 15Vrms (Condition No Load) output level – without deterioration of sound quality.

Equipped with balanced 2.5mm and 4.4mm and unbalanced 3.5mm and 6.35mm outputs, the ACRO CA1000 can accommodate a wide variety of headphones. Using ultra-small relay parts, circuits for each output are physically separated from each other to minimise any internal noise interference that can adversely affect the quality of the signal and sound.

DAC magic

A digital-to analogue converter (DAC) contributes majorly to how close to the original recording the listener will experience. With a pedigree of designing and engineering award-winning premium DAPs Astell&Kern knowledge of DAC technology is unprecedented. The ACRO CA1000 arrives with a high-quality, high-performance Quad ES9068AS DAC that delivers a clear, detailed and balanced sound without distortion. The Quad-DAC also supports high-resolution audio playback up native DSD512 and 32bit/384 kHz, enabling the music fan to get even closer to the original studio sound, while revealing musical details never heard before.

First introduced in the A&futura SE180 DAP, the ACRO CA1000 features Astell&Kern’s patented TERATON ALPHA technology. The result of extensive research and development, this sound solution is designed to deliver audio playback close to the original sound through the audio output interface by use of effective power noise removal, efficient power management and amplification with minimal distortion.

The speaker effect with headphones

In a headphone environment where the left and right channels are clearly separated, ear fatigue can increase when listening over long periods. Activate the Crossfeed function and a more comfortable listening experience is revealed. This mode has the effect of blending the left and right channels, relieving ear fatigue by creating a more natural sound akin to listening to speakers. In this setting Shelf Cutoff, Shelf Gain, and Mixer Levels are adjustable according to listening tastes.

DAP credentials

More than just a powerful headphone amp, the ACRO CA1000 also features DAP capabilities, transforming it into the go-to-system for head-fi aficionados. A titling 4.1-inch touchscreen (up to 60-degrees) enables easy control of the player and amp settings with an intuitive Android OS and feature set taken from its award-winning portable DAPs.

Although not entirely mobile as an Astell&Kern DAP, this amp player hybrid system is compact and portable. Equipped with an 8,400mAh large capacity battery, the ACRO CA1000 can provide up

to 10.5 hours playback without a separate power supply. This headphone amp also supports USB-PD 2.0 (9V/3A) fast charging, so anyone with a charger that supports USB Power Delivery (USB-PD) can experience improved charging times – a one hour charge provides 50% battery, while it takes 2.5 hours for a full charge. A green light on the CA1000 will indicate when USB-PD fast charging is active.

An array of inputs and outputs allows connection of digital and analogue sources to expand the systems capabilities. These include Optical, Coaxial, Type-C USB digital inputs/outputs and RCA analog input/output.

The ACRO CA1000 harbours 256GB on-board memory that can be expanded up to 1TB via a microSD card slot, meaning users can stockpile thousands of hi-res albums. Elsewhere, Replay Gain functionality automatically and uniformly adjusts volume playback from sound sources up to 24-bit/192 kHz so playlists can be enjoyed throughout without reaching for the volume.

Connectivity

A BT Sink function connects the ACRO CA1000 to an external device, such as a smartphone, via Bluetooth, enabling music to be played back in high-quality on the headphone amp.

Elsewhere the ACRO CA1000 boasts Bluetooth® 5.0, providing greater range and a more stable wireless connection to headphones and, along with support for 24-bit aptX™ HD and LDAC codecs, offers the best possible wireless sound quality.

Alongside dual-band Wi-Fi support, the ACRO CA1000 features AK File Drop for easier wireless file transfers. Users can wirelessly transfer files through a PC, smartphone, or FTP program located on the same network to make music management even more convenient.

Any ACRO CA1000 owner with a Roon subscription can wireless stream all their high-resolution music, whether from Tidal, Qobuz services or digital music files stored on a hard-drive, computer or NAS drive, from this immersive music platform to the amp.

Out of this world design

The ACRO CA1000’s beautifully engineered aluminum body shape and the prominent and tactile volume wheel design are inspired by rugged space-age exploration vehicles that power across planetary terrain. The system still retains Astell&Kern’s signature angular shadow and light motif to seamless fit into the company’s bold and aspirational design language.

The Astell&Kern ACRO CA1000 is priced £1,999 / $2,100 / €2,299 and is available from www.astellkern.co.uk and local independent dealers.

TECHNICAL SPECIFICATIONS

General specifications

Body Colour: Moon Silver

Body Material: Aluminium

Display: 4.1-inch, 720 x 1280px touch screen

Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, 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 / DSD256(1bit 11.2MHz), DSD512(1bit, 22.4MHz) Stereo

Output Level:

Headphone Out

  • [Low] Unbalanced 2Vrms / Balanced 4Vrms (Condition No Load)
  • [Mid] Unbalanced 4Vrms / Balanced 8Vrms (Condition No Load)
  • [High] Unbalanced 6Vrms / Balanced 12Vrms (Condition No Load)
  • [Super] Unbalanced 8Vrms / Balanced 15Vrms (Condition No Load)

RCA Out

  • 2Vrms (Condition No Load)

CPU: Quad-core

DAC: ESS ES9068AS x4 (Quad-DAC)

Decoding: Support up to 32bit / 384kHz Bit to Bit playback

Headphone Outputs: Unbalanced (3.5mm, 6.35mm) / Balanced (2.5mm, 4.4mm)

Analog Inputs: RCA (Stereo pair) x1

Analog Outputs: RCA (Stereo pair) x1

Digital Inputs: Coaxial x1, Optical x1, USB(Type-C) x1

Digital Outputs: Optical(3.5mm) x1, USB(Type-C) x1

Wi-Fi: 802.11 a/b/g/n/ac (2.4/5GHz)

Bluetooth: V5.0 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC)

Dimensions: 4.12″(104.9mm)[W] x 1.77″(45mm)[H] x 5.85″(148.8mm)[D]

Weight: about 919g (32.41oz)

Feature Enhancements: Firmware upgrade supported (OTA)

Audio specifications*

Frequency Response:

  • ±0.024dB (Condition : 20Hz~20kHz) Unbalanced / ±0.018dB (Condition : 20Hz~20kHz) Balanced / ±0.048dB (Condition : 20Hz~20kHz) RCA
  • ±0.059dB (Condition : 20Hz~70kHz) Unbalanced / ±0.056dB (Condition : 20Hz~70kHz) Balanced / ±0.048dB (Condition : 20Hz~70kHz) RCA

S/N: 107dB @ 1kHz, Unbalanced / 115dB @ 1kHz, Balanced / 119dB @ 1kHz, RCA

Crosstalk: -105dB @ 1kHz, Unbalanced / -124dB @ 1kHz, Balanced / -121dB @ 1kHz, RCA

THD+N: 0.005% @ 1kHz, Unbalanced / 0.002% @ 1kHz, Balanced / 0.0004% @ 1kHz, RCA

IMD SMPTE: 0.0008% 800Hz 10kHz (4:1) Unbalanced / 0.0004% 800Hz 10kHz (4:1) Balanced /0.0003% 800Hz 10kHz (4:1) RCA

Output Impedance: 3.5mm, 6.35mm (1ohm), 2.5mm, 4.4mm (2ohm), RCA (2ohm)

Clock Jitter: 25ps (Typ)

Reference Clock Jitter: 70ps

* Audio specifications will be based on Low Gain setting.

Built-in Memory: 256GB [NAND]

External Memory: microSD x1 (Max. 1TB)

Battery Capacity: 8,400mAh 3.8V Li-Polymer

Charge Time: about 2.5hours (9V / 3A PD2.0 Fast Charging) | 7hours (5V 2A General Charging)

Playback Time: about 10.5hours (Standard: FLAC, 16bit, 44.1kHz, Unbalanced, Vol.40, LCD Off, Low Gain)

Supported OS: Windows 7, 8, 10 (32/64bit), MAC OS X 10.7 and above

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A&norma SR25 MKII: Astell&Kern unveils the second-generation model of its award-winning, ultra-portable hi-res audio player

Astell&Kern, the global leader in premium portable high-resolution audio devices, introduces the second generation model of its popular and award-winning entry-level player, the A&norma SR25 MKII. Every aspect admired about the original SR25 is retained with the new model improving on the audio performance, adding new features, such as a balanced 4.4mm headphone jack, and tweaking its already eye-catching and ultra-compact design. The A&norma SR25 MKII represents the perfect entry-point into Astell&Kern’s unrivalled world of high-resolution music playback on-the-move.

Astell&Kern A&norma SR25 MKII feature upgrades include:

  • Improved sound performance
  • 4.4mm headphone jack to deliver enhanced dynamic range, bass response, wider soundstage, clearer imaging and more detail in the audio source.
  • Replay Gain function to uniformly adjust volume playback from sound sources up to 24-bit/192 kHz.
  • AK File Drop for easier wireless file transfers.
  • BT Sink function for simpler connection of the SR25 MKII to an external Bluetooth device
  • Extra internal silver-plated shielding, first seen in the higher-end SP2000T, to protect from electromagnetic interference.
  • New, more defined volume wheel design.
  • New darker and stylish Mercury Dark Silver finish.

Even more balance and detail

This new pocket powerhouse may have a familiar look and feel but it delivers superior sound through Astell&Kern’s latest advanced audio design technology. Presenting more detail than its predecessor, the natural high-resolution sonics deliver clearly defined upper and lower ranges and a deeper, more rounded sound.

The addition of the balanced 4.4mm headphone jack, joining the 2.5mm (balanced) and 3.5mm (unbalanced) outputs, means music fans can connect an even wider variety of headphones, IEM’s and devices. The 4.4mm balanced output provides improved dynamic range and bass response, supports a wider soundstage, while capturing clear imaging and subtle details in the audio source.

As with the first-generation model, the SR25 MII handles an array of high-resolution music formats and sample rates. Support for native playback of DSD256 and 32-bit/384KHz PCM high-resolution audio, brings every music fan closer to hearing the artist’s original studio sound. Should you want to listen to your favourite hi-res music over a wireless connection, the SR25 MKII features the latest high-definition Bluetooth wireless codecs: LDAC and aptX™ HD.

Replay gain

The SR25 MKII also adds Replay Gain functionality to the mix. This automatically and uniformly adjusts volume playback from sound sources up to 24-bit/192 kHz so playlists can be enjoyed throughout without reaching for the volume.

Extra connectivity options

First introduced in the A&futura SE180 player, AK File Drop ensure easier wireless file transfers. Users can wirelessly transfer files through a PC, smartphone, or FTP program located on the same network to make music management even more convenient. Secondly, the new BT Sink function connects the SR25 MKII to an external device, such as a smartphone, via Bluetooth, enabling music to be played back in high-quality on the Astell&Kern player.

Added internal protection

Astell&Kern players apply shield cans to eliminate electromagnetic interference caused when internal components are in operation. First introduced in the higher-end A&ultima SP2000T, the SR25MKII has taken further measures by applying highly conductive, hyper-pure silver plating on the existing shield cans for extra defence against these sound performance-effecting disturbances.

Refined design

The SR25 MKII inherits the overall design identity of the original SR25 model, sporting the recognisable angled top and bottom bezel edges to give the impression the smaller inner rectangle is floating freely from the main body. The new look pattern on the side volume wheel is also more defined and tactile, drawing more attention to this area of the player. Lastly, the new darker hue of silver (Mercury D. Silver) stands apart from the original’s Moon Silver livery.

Protect your A&K player

A protective case in a choice of three eye-catching finishes is available to compliment the SR25 MKII and safeguard this premium player from the vagaries of a life on the road. Made from a soft and durable LASKINA® polyurethane fabric from Italy, this memory material offers protection against external shocks and scratches, while providing excellent grip. The fabric also mimics the texture of classic, high-end leather, for a luxurious and vibrant look, including natural leather-style creases and shine. Finishes include Denim Blue, Orange and Black.

The Astell&Kern A&norma SR25 MKII is priced £699 / $749 / €799 and is available now from www.astellkern.co.uk and local independent dealers.

The Astell&Kern A&norma SR25 MKII case is priced £59 / $60 / €69 and is available now from www.astellkern.co.uk and local independent dealers.

TECHNICAL SPECIFICATIONS

General Specifications

Model: SR25 MKII

Body Colour: Mercury Dark Silver

Body Material: Aluminium

Display: 3.6-inch HD 720 x 1280 px touch screen

Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA

Sample rate PCM : 8kHz ~ 384kHz (8/16/24/32bits per Sample) DSD Native: DSD64(1bit 2.8MHz), Stereo / DSD128(1bit 5.6MHz), Stereo / DSD256(1bit 11.2MHz), Stereo

Output Level: Unbalanced 2Vrms │ Balanced 4Vrms (Condition No Load)

CPU: Quad-core

DAC: Ciruss Logic CS43198 x2 (Dual-DAC)

Decoding: Support up to 32bit / 384kHz Bit to Bit playback

Input: USB Type-C input (for charging & PC & MAC)

Outputs: Unbalanced Out (3.5mm), Balanced Out (2.5mm, only 4-pole supported / 4.4m, only 5-pole supported)

Wi-Fi: 802.11 b/g/n (2.4GHz)

Bluetooth: V4.2 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC)

Dimensions: 2.5” (63.5mm)[W] x 4.26” (108.3mm)[H] x 0.63” (16.1mm)[D]

Weight: about 178g (6.27oz)

Firmware upgrade supported (OTA)

Operating Temperature: 0℃ ~ + 40℃ (32℉~ 104℉)

Audio performance

Frequency Response

  • ±0.014dB (Condition : 20Hz~20kHz) Unbalanced │ ±0.011dB (Condition : 20Hz~20kHz) Balanced
  • ±0.010dB (Condition : 20Hz~70kHz) Unbalanced │ ±0.012dB (Condition : 20Hz~70kHz) Balanced

S/N

  • 122dB @ 1kHz, Unbalanced
  • 124dB @ 1kHz, Balanced

Crosstalk

  • -138dB @ 1kHz, Unbalanced
  • -144dB @ 1kHz, Balanced

THD+N

  • 0.0006% @ 1kHz, Unbalanced
  • 0.0005% @ 1kHz, Balanced

IMD SMPTE

  • 0.0004% 800Hz 10kHz (4:1) Unbalanced
  • 0.0003% 800Hz 10kHz (4:1) Balanced

Output Impedance

  • Unbalanced Out 3.5mm (1.2ohm)
  • Balanced Out 2.5mm (1.8ohm), 4.4mm (1.7ohm)

Clock Source

Clock Jitter: 25pS (Typ)

Reference Clock Jitter: 70ps

Storage Capacity

Built-in Memory: 64GB [NAND]

External Memory: microSD x1 (Max. 1TB)

Battery

Capacity: 3,150mAh 3.7V Li-Polymer

Charge Time: about 2.5hours (5V 2A General Charging)

Playback Time: about 20hours (Standard : FLAC, 16bit, 44.1kHz, Unbalanced, Vol.50, EQ Off, LCD Off)

Supported OS

Supported OS: Windows 7,8,10(32/64bit) MAC OS X 10.7

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Astell&Kern

Astell&Kern’s latest A&ultima SP2000T portable digital audio player packs a next gen triple amp system

Astell&Kern, the global leader in premium portable high-resolution audio devices, introduces its newest member of its A&ultima series, the  SP2000T. Building on the class-leading sound of the A&ultima SP2000, this latest player is the first to feature a Quad-DAC, a Replay Gain function and a new Triple Amp System allowing music fans to switch between the different sonic characteristics of a normal OP-AMP (operational amp) mode, a vacuum TUBE AMP and a HYBRID AMP mode that combines the tube amp’s warm analog performance and Op-Amp’s high-resolution clarity.

Astell&Kern A&ultima SP2000T new audio design and feature innovations include:

  • Triple Amp System takes portable music listening to a new acoustic level.
  • Vacuum tube amplifier compatible with 2.5mm, 3.5mm and 4.4mm output jacks.
  • Equipped with an ESS ES9068AS QUAD-DAC for balanced and ultra-detailed sound.
  • New TERATON ALPHA Sound Solution technology.
  • Replay Gain function uniformly adjusts volume playback from sound sources up to 24-bit/192 kHz.
  • Dual-Band Wi-Fi Support for improved wireless connection.
  • Internal mechanical design to minimise noise.

NEXT GENERATION AMPLIFIER TECHNOLOGY

Boasting the most advanced amp technology of any portable player, SP2000T owners can toggle between three-amp modes to find the optimal sound to suit the music they are listening to. Based on the set-up from the original SP2000, the OP-AMP configuration offers ultra-clarity and a dynamic playback. Switch to the TUBE AMP mode and the uniquely warm and musical audio associated with vacuum tube amplifiers will be revealed.

To realise the sonic flavour of a vacuum tube amp, the SP2000T is equipped with the portable-friendly dual-triode KORG Nutube. Featuring an anode grid filament structure that operates the same as a triode vacuum tube, this smaller component, consumes far less power, yet delivers the same audio with rich overtones. The Nutube also offers a reliable continuous playback time of approximately 30,000 hours with support for the player’s onboard 2.5mm, 3.5mm and 4.4mm headphone output jacks.

BEST OF BOTH AMP WORLDS

The culmination of Astell&Kern’s rich amp design heritage and expertise, the new innovative HYBRID MODE brings together the distinctive sonic DNA of the detailed OP-AMP and expressive TUBE AMP modes, while providing five options with different mix ratios of each amp’s sound characteristics to best serve the music being played.

SPECIAL INTERNAL DESIGN

To overcome internal microphonic resonances generated by the vacuum tubes that can seriously impact sound quality, Astell&Kern’s audio engineers painstakingly designed a clever modular structure physically separate from the PCB (Printed Circuit Board). Firstly, the vacuum tubes are fixed with flexible silicone covers to minimize any mechanical vibration, while the design uses magnetic forces to float the amp in the air to reduce internal noise.

Further steps are taken to eliminate electromagnetic interference caused when internal components are in operation by applying highly conductive, hyper-pure silver plating on the existing shield cans for extra defence against these sound performance-effecting disturbances.

QUAD-DAC FOR SUPERIOR SOUND

The SP2000T comes equipped with four ES9068AS DACs, with two DACs per channel dedicated for decoding. The result is a more detailed and balanced sound with great depth and spatial realism.

This latest model is also the first to feature Replay Gain functionality that automatically and uniformly adjusts volume playback from sound sources up to 24-bit/192 kHz so playlists can be enjoyed throughout without reaching for the volume.

INTRODUCING TERATON ALPHA SOUND SOLUTION TECHNOLOGY

Following on from the A&futura SE180 player, the SP2000T is the second model to adopt Astell&Kern’s patented TERATON ALPHA Sound Solution. The result of extensive research and development, it is designed to deliver audio playback close to the original sound. The onboard DAC is not the only factor that determines the quality of sound from a DAP: Power, noise, signal conversion, circuit structure all effect the sound signature. Only when each and every one of these elements are optimised, can a player produce sound as close as the music artist and producer intended.

TERATON ALPHA technology, effectively removes power noise and provides efficient power consumption and amplification right through to the audio output interface stage where the digital-to-analogue signal conversion (DAC) takes place – audio technology Astell&Kern has consistently developed and perfected over the years.

FULL HD DISPLAY

Album artwork pops from the screen with the A&ultima SP2000T boasting a full HD display. This 5-inch touchscreen packs a 1920×1080 pixel resolution, 16.7 million colours and 441 PPI, resulting in a clean and sharp user-interface design.

CONNECTIVITY

Alongside with improved dual-band Wi-Fi support, the SP2000T features AK File Drop for easier wireless file transfers. Users can wirelessly transfer files through a PC, smartphone, or FTP program located on the same network to make music management even more convenient.

The new BT Sink function connects the A&ultima SP2000T to an external device, such as a smartphone, via Bluetooth, enabling music to be played back in high-quality on the Astell&Kern player.

Elsewhere A&ultima SP2000T boasts Bluetooth® 5.0, providing greater range and a more stable wireless connection to headphones and, along with support for 24-bit aptX™ HD and LDAC codecs, offers the best possible wireless sound quality.

The A&ultima SP2000T harbours 256GB on-board memory that can be expanded up to 1TB via a microSD card slot, meaning users can carry thousands of hi-res albums with them at all times.

The Astell&Kern A&ultima SP2000T is priced £1,999 / $2,399 / €2,299 and is available now from www.astellkern.co.uk and local independent dealers.

Technical specifications*

Body Colour: Onyx Black

Body Material: Aluminum

Display: 5.0-inch touchscreen, FHD 1920 x 1080 pixels

Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, 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 / DSD256(1bit 11.2MHz), DSD512(1bit, 22.4MHz) Stereo

Output Level: Unbalanced 3Vrms │ Balanced 6Vrms (Condition No Load)

CPU: Quad-core

DAC: ESS ES9068AS x4 (Quad-DAC)

Vacuum Tube: KORG Nutube 6P1

Decoding: Support up to 32bit / 384kHz Bit to Bit playback

Input: USB Type-C input (for charging & PC & MAC)

Outputs:

  • Unbalanced Out (3.5mm), Optical Out (3.5mm)
  • Balanced Out (2.5mm, only 4-pole supported / 4.4m, only 5-pole supported)

Wi-Fi: 802.11 a/b/g/n/ac (2.4/5GHz)

Bluetooth®: V5.0 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC)

Dimensions: 3.07″ (78.1mm)[W] x 5.55″ (141.1mm)[H] x 0.68″ (17.5mm)[D]

Weight: about 10.89oz (309g)

Feature Enhancements: Firmware upgrade supported (OTA)

Frequency Response:

  • ±0.024dB (Condition: 20Hz~20kHz) Unbalanced / ±0.038dB (Condition: 20Hz~20kHz) Balanced
  • ±0.027dB (Condition: 20Hz~70kHz) Unbalanced / ±0.052dB (Condition: 20Hz~70kHz) Balanced

S/N:

  • 121dB @ 1kHz, Unbalanced
  • 123dB @ 1kHz, Balanced

Crosstalk:

  • -137dB @ 1kHz, Unbalanced
  • -142dB @ 1kHz, Balanced

THD+N:

  • 0.0003% @ 1kHz, Unbalanced
  • 0.0003% @ 1kHz, Balanced

IMD SMPTE:

  • 0.0004% 800Hz 10kHz (4:1), Unbalanced
  • 0.0003% 800Hz 10kHz (4:1), Balanced

Output Impedance:

  • Unbalanced Out 3.5mm (1ohm)
  • Balanced Out 2.5mm (1.5ohm), 4.4mm (1.5ohm)

Clock Source

Clock Jitter: 25ps (Typ)

Reference Clock Jitter: 70ps

*Audio specifications will be based on Operational (OP) AMP.

Storage Capacity

Built-in Memory: 256GB [NAND]

External Memory: microSD x1 (Max. 1TB)

Battery

Capacity: 4,200mAh 3.8V Li-Polymer

Charge Time: About 3.5hours (9V / 1.67A Fast Charging) | 5hours (5V 2A General Charging)

Playback Time: About 9hours (Standard: FLAC, 16bit, 44.1kHz, Unbalanced, Vol.50, LCD Off, LED On, OP AMP Mode)

Supported OS 

Windows 7, 8, 10 (32/64bit), MAC OS X 10.7

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