A&norma SR25 MKII

A&norma SR25 MKII
The Pocket Powerhouse

  • Delivers superior sound through Astell&Kern’s latest advanced audio design technology.
  • 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.
  • Features 2.5mm, 3.5mm and 4.4mm output jacks to connect a wider variety of headphones.
  • Equipped with a Quad-Core processor paired with a top-quality Dual Cirrus Logic CS43198 DAC for balanced and ultra-detailed sound.
  • Boasts the latest high-definition 24-bit Bluetooth wireless codecs: LDAC and aptX™ HD.
  • Replay Gain function uniformly adjusts volume playback from sound sources up to 24-bit/192 kHz.

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The Pocket Powerhouse

Introducing A&norma SR25 MKII - the second-generation model of our award-winning entry-level player. Taking the much-loved original to the next level, this latest player improves on the audio performance, adds new features, such as a balanced 4.4mm headphone jack, and tweaks 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.

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Superior sound

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. At the helm is a Quad-Core processor paired with a top-quality Dual Cirrus Logic CS43198 DAC

Hi-res chops

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 24-bit Bluetooth wireless codecs: LDAC and aptX™ HD.

The right balance

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.

Seamless playback volume

The SR25 MKII 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.

Boosted connectivity

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. 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.

A&norma SR25 MKII - Gallery 4
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A&norma SR25 MKII - Gallery 2
A&norma SR25 MKII - Gallery 1
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Included in the box

  • 1x Astell&Kern A&norma SR25 MKII player
  • 1x USB-C to USB-A cable (1 metre)
  • 3x screen protectors
  • 1x Quick start guide

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
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
MD 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