Astell&Kern SR25 MKII
Portable Music Player

£699.00
FREE Home Delivery
In-stock
Estimated Delivery within 1-2 Working Days

Astell&Kern SR25 MKII Portable Music Player

A Pocket Powerhouse

True to the core values of Astell&Kern, high fidelity sound lies at the heart of the SR25 MKII, delivering exceptional audio performance to a diverse range of music lovers. The most distinctive feature of the Astell&Kern A&norma product line is its compact form factor. However, the SR25 MKII offers more detailed sound than its predecessor, allowing the clear expression of each and every instrument and vocal note.

The SR25 MKII offers more versatile connectivity options with the addition of a 4.4mm balanced output for the first time in an A&norma player, LDAC, as well as Qualcomm® aptX™ HD, which support and deliver true audiophile sound quality.

The SR25 MKII keeps everything we love about the SR25 and adds new design features. It will produce the best sound quality anywhere, anytime.

  • The SR25 MKII is a true mass premium product
  • Improved audio quality compared to the SR25
  • Versatile connectivity, with addition of 4.4mm balanced output support
  • Energy-efficient design resulting in 20 hours of continuous playback
  • Supports two-way Bluetooth and high-definition codecs (Qualcomm® aptX™ HD, LDAC)
  • ReplayGain automatically maintains constant volume
Astell & Kern SR25MKII DAP | Digital Audio Player

Performance Mode for Ultra High Resolution Sound

Not all DACs sound the same.

The SR25 MKII delivers improved performance across the board compared to the SR25, including bass response, dynamic range, soundstage, imaging and more.

The SR25 MKII utilizes Astell&Kern's latest audio design technology for clear and natural high-resolution sound with more clearly defined upper and lower ranges providing listeners with a deeper, more rounded sound.

Bit-to-Bit playback is available in models up to the SR25 MKII 32 bit 384 kHz. Native DSD audio is available up to 11.2 MHz, for uncompressed sound quality, staying true to the artist’s original intention, in high-resolution and with minimal distortion.

With seamless playback performance supporting native DSD256 up to 32 bit/384 kHz, you will derive even more pleasure from your music.

32-bit bit-to-bit Playback by the SR25 MKII

Astell & Kern SR25MKII DAP | Digital Audio Player

32-bit Playback by Other Products

Astell & Kern SR25MKII DAP | Digital Audio Player

Multiple Output Options

The SR25 MKII supports 4.4mm balanced output. With 2.5mm, 3.5mm and 4.4mm output options, you can connect an even wider variety of devices.

The 4.4mm balanced output provides improved dynamic range and bass response, supports a wide soundstage, offers clear imaging, and captures subtle details in the audio source.

Enjoy your music without worrying about adaptors.

SR25 MKII Output Structure

Astell & Kern SR25MKII DAP | Digital Audio Player

Silver Plating Shield Can

Astell&Kern products apply shield cans so that noise and electromagnetic interference, which occur when the countless parts are in operation, do not affect the audio block.

The SR25 MKII has taken it a step further by applying highly conductive, hyper-pure silver plating on the existing shield cans for perfect shielding that provides excellent audio performance.

Astell & Kern SR25MKII DAP | Digital Audio Player

Excellent Continuous Playback Time

No need to worry about battery life. The SR25 MKII can play continuously for 20 hours with just one full charge, thanks to its optimized, energy-efficient circuitry. Enjoy your own personal musical performance anytime, anywhere with the SR25 MKII’s extended playback time and its portability.

* Music in FLAC format, 16 bit, 44.1 kHz, unbalanced, volume at 50, EQ Off, LCD Off
* Playback time may vary depending on the user environment.

Wireless Hi-Fi Sound Through BT Sink

The newly introduced BT Sink function connects the SR25 MKII to an external device via Bluetooth,
similar to connecting a smartphone with a BT speaker.

Music from an external device, such as a smartphone can now be played back in high-quality on the SR25 MKII using the BT Sink function.

Astell & Kern SR25MKII DAP | Digital Audio Player

BT Connect (RX Mode/BT Sink)

Astell & Kern SR25MKII DAP | Digital Audio Player

BT Connect (TX Mode)

ReplayGain Automatically and Uniformly Adjusts Playback Volume

ReplayGain, which adjusts sound sources with different volumes to an identical level, has been applied. Now, enjoy your own playlists seamlessly through the ReplayGain feature on SR25 MKII.

- ReplayGain supports up to 24bit/192 kHz sound sources.

Astell & Kern SR25MKII DAP | Digital Audio Player

AK File Drop to enjoy wireless transfers

The new AK File Drop function in the SR25 MKII makes files transfers easier and more convenient.
Using AK File Drop, you can freely transfer files wirelessly through a PC, smartphone, or FTP program located on the same network.
Music file management is now possible with a cableless, wireless solution.

Astell & Kern SR25MKII DAP | Digital Audio Player

DESIGN

The A&norma SR25 MKII inherits the overall design identity of the A&norma SR25 model, highlighting the rhythmic freedom of music through the harmonious combination of design elements.

The top and bottom edges of the bezel are angled, giving the impression of a smaller rectangle floating freely inside the chassis. The pattern on the side is designed to draw attention to the volume wheel whilst conveying an impression of sound.

Astell & Kern SR25MKII DAP | Digital Audio Player

General Specifications

Model SR25 MKII
Body Color Mercury D. Sliver
Body Material Aluminum
Display 3.6inch HD (720 x 1,280) TFT LCD
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 Cirrus 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®aptXTM HD, LDAC)
Dimensions 2.5 ”(63.5 mm) [W] x 4.26 ”(108.3 mm) [H] x 0.63 ”(16.1 mm) [D]
Weight about 6.27 oz (about 178 g)
Feature Enhancements Firmware upgrades supported (OTA)
Operating Temperature 0? ~ + 40? (32?~ 104?)

Audio Performance

Frequency Response ±0.014dB (Condition: 20Hz~20kHz) Unbalanced / ±0.011dB (Condition: 20Hz~20kHz) Balanced
±0.10dB (Condition: 20Hz~70kHz) Unbalanced / ±0.12dB (Condition: 20Hz~70kHz) Balanced
Signal to Noise Ratio 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), 4.4.mm (1.7ohm)

Clock Source

Clock Jitter 25ps(Typ)
Reference Clock Jitter 70ps

Battery

Capacity 3,150mAh 3.7V Li-Polymer Battery
Continuous Playback Time about 20hours (Standard : FLAC, 16bit, 44.1kHz, Unbalanced, Vol.50, EQ Off, LCD Off)
Charge Time about 2.5hours (5V 2A General Charging)

Memory

Built-in Memory 64GB [NAND]
External Memory microSD (Max. 1TB) x1

OS

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