Astell&Kern A&norma SR25 Hi-Fi Music Player 64GB

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Colour: Silver

If you want to come to our experience stores and experience this product for yourself, you can get support from our Hifilife Experience Experts by contacting our stores at the contact numbers below.

Astell&Kern | Hifilife Akasya: 0538 013 02 59

Astell&Kern | Hifilife Canyon: 0531 080 80 45

Astell&Kern | Hifilife Panora: 0535 366 34 83

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The new Hi-Fi Standard, A&norma SR25 , is the second model in the Astell & Kern A & norma standard series.

Starting with the AK70 , Astell & Kern 's goal was to bring high resolution sound and Astell & Kern quality to more music lovers.

This goal continued with the successor to the AK70, the A&norma SR15, and now it is further advanced with the SR25, a premium product that fully embraces Astell & Kern's philosophy and technology, and is available to the masses.

The SR25 never-ending "How can we approach the original sound the artist intended ?" It is the final answer to the question.

The SR25 improves on the SR15:

  • The new, faster Quad-Core CPU is paired with the Dual Cirrus Logic CS43198 Master Hi-Fi level DAC, first used in the SR15

  • Native playback support for DSD256

  • The new performance mode, a leader in its class, provides ultra-high quality playback without compromising

  • Redesigned circuit to enhance sound quality improvements

  • Adding Bluetooth LDAC codec to provide users with higher quality wireless sound and more options

The essence of Astell & Kern's philosophy of never compromising on sound quality is exemplified in the SR25, which showcases every musical detail and delivers flawless playback that only Astell & Kern can achieve.

Performance Mode for Ultra High-Resolution Audio

The SR25 supports native DSD256 and 32bit / 384kHz audio for the first time in an Astell & Kern entry-level product, with performance that cannot be compared to other competitors' products in the same category.

Smaller than other players, the SR25 has been developed to achieve stable, ultra-high definition sound . We have created a new Performance Mode that automatically optimizes and adjusts the memory mode in the system based on the size of the data being played on the SR25.

As the resolution of the audio source increases, a large amount of data needs to be processed quickly. If this situation is not optimized, sound degradation may occur. To avoid this, the SR25 uses the new Performance Mode to tune and optimize the system to produce near-perfect sound quality when playing hi-res audio .

Experience ultra-high resolution with the SR25's Performance Mode, which reproduces even the smallest details of the original recording the artist sought without compromise.

Excellent Circuit Design for the Highest Sound Quality
Smooth playback of digital audio at DSD256 and 32bit/384kHz requires a high-performance processor and high memory speed. An appropriate audio path is also necessary for high-speed signal processing.

Optimizing the length of the audio path is a crucial part, as if not done properly, it can cause a delay in sound between signals.

With the SR25 , the Astell & Kern team developed a completely different PCB design from the current SR15 to handle high speed signals when needed, resulting in the same audio path lengths and allowing for super high resolution audio without any lag.


In addition, newly designed audio circuits and power circuits have been implemented for distortion-free signal transmission and noise cancellation on each channel.

As a result, the Ultra-Low Noise Filter in SR25 allows you to experience Astell & Kern's flawless sound with Zero Noise.

Embark on a Musical Journey All Day Long

If the stable design and efficiency of the power supply are not taken into account properly, the difference between the input/output voltage will increase and the output voltage may become unstable when the output current is high. This can cause excessive noise that could be a significant cause of low audio quality. Additionally, low power efficiency can lead to shorter playback times.

SR25 has set a high bar for the Astell & Kern engineering team - increasing the previous Astell & Kern products' longest playback time while maintaining the signature Astell & Kern quality sound and low noise

In the SR25, the team not only implemented high-efficiency components, but focused on developing circuit optimizations to get the most out of their performance.

The result is a continuous playback time of up to 21 hours without compromising on sound quality, which is more than twice that of the previous generation SR15.

You don't have to worry about battery life during your daily travels, enjoy your music journeys with SR25.

No Compromise on Sound, Even When Connected Wireless

Similar to previous Astell & Kern players, in addition to playing 24-bit music via aptXTM HD Bluetooth, SR25 adds LDAC support to offer users more options for listening to high-resolution audio wirelessly.

Now you can enjoy Astell & Kern 's high-quality sound when paired with Bluetooth headphones and speakers.

Astell & Kern's Exclusive Metalworking Technology

Astell&Kern products are often compared to art sculptures, with colorful faces and angles not found in other products. This precise design work is based on Astell&Kern's long accumulated know-how and highly precise metalworking technology.

In order to produce this unique style Astell&Kern is famous for, 5-axis machining is performed instead of traditional 3-axis machining used in general machining. All metal must be processed at once without interruption.

In addition to 5-axis machining, Astell&Kern has perfected it's crafting of metal through thousands of hours of trial and error. Only after mastering these techniques that Astell&Kern has developed, can the beauty of the metal shine through.

The vibration-free processing machines used by Astell&Kern are the same ones used by expensive Swiss luxury watch manufacturers. This is reflected in the crafting of the volume wheel which is processed precisely like the crown of a luxury watch for the best operating feel.

Astell&Kern products are designed to achieve perfect integration at whatever angle you look at it in your hands.

The Aluminum body on the SR25 provides maximum sound quality, while suppressing noise as much as possible. The use of laser ground extension technology gives you the best sound possible, without interference or distortion.

Astell&Kern combines these small parts to make a big difference in the quality of our products that no other manufacturer can match.



Latest System Optimization for a Better User Experience

The SR25 firmware is based on Android 9.0, which adds a number of behind the scene features and upgrades to provide more stable operation over previous versions of Android OS. The use of Android 9.0 ensures the most popular music streaming apps installed via Open APP will be fully compatible with your Astell&Kern player now and with future app updates.

Astell&Kern customizes Android to provide a fully optimized system and user interface, designed to give users a smooth, fluid musical playback experience.

Using Open APP Service

The Open APP Service enables the user to install specific APK music streaming apps to the device.
Copy the desired APK into the Open Service folder of the product and install the relevant App in the Menu-Service of the product.



MQA (Master Quality Authenticated) is an award-winning British technology that delivers the sound of the original master recording.
The master MQA file is fully authenticated and is small enough to stream or download. Visit for more information.
Astell&Kern SR25 includes MQA technology, which enables you to play back MQA audio files and streams,
delivering the sound of the original master recording.




Model: SR25
Body Color: Silver
Body Material: Aluminum
Display: 3.6 inch (720 x 1,280) TFT LCD Touchscreen
Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA
MQA playback Services: (Tidal Master), Local files, External USB, MQA-CD
Sampling Rate: PCM: 8kHz ~ 384kHz (8/16/24/32 bits per sample) / DSD Native: DSD64 (1bit 2.8MHz), Stereo / DSD128 (1bit 5.6MHz), Stereo / DSD256 (1bit 11.2MHz), Stereo
Output Level: Unbalanced 2.0Vrms / Balanced 4.0Vrms (Condition No Load)
CPU : Quad Core

DAC : Cirrus Logic CS43198 x2 (Dual DAC)
Audio Analysis: Support up to 32bit/384kHz Bit-to-Bit Playback
Input : USB Type-C input (for PC and MAC)
Output : Unbalanced Output (3.5 mm) / Balanced Output (2.5 mm, only 4 poles supported)
Wi-Fi: 802.11 b/g/n (2.4GHz)
Bluetooth : V4.2 (A2DP, AVRCP, aptX HD, LDAC)
Dimensions : 2.5" (63.5mm) [W] x 4.26" (108.3mm) [H] x 0.63"(16.1mm) [D]
Weight : 178 g (6.27 oz)
Advanced features: Internet update supported (OTA)


Frequency Response: ±0.014dB (Status: 20Hz ~ 20kHz) Unbalanced / ±0.011dB (State: 20Hz ~ 20kHz) Balanced
±0.010dB (Status: 20Hz ~ 70kHz) Unbalanced / ±0.12dB (State: 20Hz ~ 70kHz) Balanced
Signal to Noise Ratio: 122dB @ 1kHz, Unbalanced / 123dB @ 1kHz, Balanced
Crosstalk: -138dB @ 1kHz, Unbalanced / -144dB @ 1kHz, Balanced
at 1 kHz

THD + N: 0.0007%, Unbalanced / 0.0008% at 1 kHz, Balanced
IMD SMPTE: 0.0004% 800Hz 10kHz (4:1) Unbalanced / 0.0003% 800Hz 10kHz (4:1) Balanced
Output Impedance: Unbalanced Output 3.5mm (1.8ohm) / Balanced output 2.5mm (1.6ohm)

Reference Clock Shifter: 25 ps (Typ) / 200 femtoseconds

Capacity : 3.150mAh 3.7V Li-Polymer Battery
Continuous Play Time: Up to 21 hours (Standard - MUSIC: FLAC, 16 bit / 44.1 kHz, Unbalanced, Volume: 50, EQ OFF, LCD OFF)
Charging Time: Approx. 2.5 hours (Standard - 5V / 2A Charge)

Internal Memory: 64GB [NAND]
External memory: microSD (Max. 1TB) x1

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

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