The A&norma line of portable audio players from Astell&Kern are designed to be an industry standard to play back high-resolution audio for the masses.  The A&norma line is a “Mass Premium” product that futures a stunning, high-end, luxurious design and reproduces sound as it was intended by the artist and engineer who originally recorded it, at an affordable price.

The Astell & Kenr SR25 MK II is a refresh of the widely popular SR25 player released in 2020.  Like the SR25, the SR25 MK II features two Cirrus Logic 43198 MasterClass DACs in dual-mono configuration, but adds a number of new features.  The SR25 supports native playback of DSD256 and 32-bit/384KHz PCM high-resolution audio.

Users can wirelessly stream 24-bit hi-res audio to compatible speakers, headphones or IEMs with support for LDAC and aptX HD Bluetooth codecs.

Other features include a 3.6-inch HD touchscreen, 64GB of internal memory with support for microSD cards up to 1TB, Wi-Fi, DLNA networking, USB digital audio output, and the ability to use the SR25 as a USB DAC for your Mac or Windows-based PC.

The SR25 MK II supports MQA, and with a full decoder built in, can unfold all the way to the original resolution of the file.  MQA playback is supported both via downloaded MQA audio files and through the Tidal app, allowing users to stream high resolution audio via Tidal Masters.

Astell&Kern’s latest user interface and support for Open App service is included in the SR25 MK II, which adds Android APK support, allowing users to install additional music streaming services to their player by simply copying and installing the corresponding APK file for the music service they wish to add.  Services supported include Apple Music, Amazon Music, Spotify, Tidal, SoundCloud, Qobuz, SiriusXM, Tune-In, myTuner, Bandcamp and Deezer (supported streaming services varies by country).  Offline content for supported apps can be stored in either internal or external player memory so you can listen to your favorite music streaming service tracks on the go.

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 is a true mass premium productImproved audio quality compared to the SR25Versatile connectivity with addition of 4.4mm balanced output supportEnergy-efficient design resulting in 20 hours of continuous playbackSupports two-way Bluetooth and high-definition codecs (Qualcomm aptX HD, LDAC)ReplayGain automatically maintains constant volume

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

Better Sound. Familiar Feel

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.

The SR25 MKII is capable of bit-to-bit playback for files up to 32bit/384kHz and Native DSD up to 11.2MHz, allowing 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 32bit/384kHz, you will derive even more pleasure from your music.

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.

Excellent Continuous Playback Time

No need to worry about battery life. The Astell & Kern SR25 MK2 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 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.

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.

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.

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.

ReplayGain Automatically and Uniformly Adjust 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.