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The SR25 is the second model in the Astell&Kern A&norma standard line.
Beginning with the AK70, Astell&Kern's goal was to bring high resolution audio and the Astell&Kern sound to more music lovers. This goal continued with the successor to the AK70, the A&norma SR15, and now evolves further as the SR25, a premium product that fully embraces Astell&Kern's philosophy and technology, now available to the masses.
The SR25 is the latest answer to our never-ending question of "How do we get closer to the original sound the artist intended?" The SR25 improves on the SR15 by:
The essence of Astell&Kern's philosophy that sound quality is never compromised is exemplified in the SR25, which expresses every musical detail and bit-perfect playback as only Astell&Kern can.
The SR25 supports native DSD256 and 32bit/384kHz audio for the first time in an Astell&Kern standard product and boasts performance that cannot be compared with other competitors' products.
The SR25, which is smaller than other players, has been developed to achieve stable, ultra-high resolution sound. Astell&Kern have developed a new Performance Mode with the SR25 that automatically optimises and sets the memory mode in the system according to the data size of the source being played.
As the resolution of the sound source increases, it is necessary to process a large amount of data rapidly. If this part is not optimised, sound breakup may occur. To prevent this, the SR25 uses the new Performance Mode to adjust and optimize the system in order to produce near perfect sound quality when playing back high resolution audio.
Experience ultra-high resolution with the SR25's Performance Mode, which reproduces even the smallest, minute details of the original recording the artist was looking for, without compromise.
Proper playback of DSD256 and 32bit/384kHz digital audio requires a high-performance CPU and fast memory speed, along with an audio path suitable for high-speed signal processing.
Optimising the length of the audio path is a very important part, as failing to properly do so can create a time delay between the signals resulting in sound abnormalities.
With the SR25, the Astell&Kern team developed a completely different PCB design from the existing SR15 to process the high speed signals where required, resulting in audio path lengths that are the same, allowing for super-high resolution sound without any delay.
Furthermore, newly designed audio patterns and power circuits for distortion-free signal transmission and noise rejection are applied to each channel.
The result is an Ultra Low Noise Filter that allows you experience Astell&Kern's flawless sound, with Zero Noise, on the SR25.
If the power supply's stable design and efficiency are not properly taken into consideration, the input/output voltage difference becomes large, and when the output current is large, the output voltage can become unstable. This leads to excessive noise being generated, which can be a major cause of poor sound quality. In addition, poor power efficiency will result in a shorter playback time.
The SR25 set a big challenge for the Astell&Kern engineering team – add the longest playback time of any previous Astell&Kern product, while maintaining the signature Astell&Kern quality sound, and a low-noise floor. In the SR25, the team not only applied highly efficient components, but they focused on developing circuit optimizations to get the most out of their performance. The result is up to 21 hours of continuous play time, more than double the previous generation SR15, with no compromise in sound quality.
No need to worry about battery life while on your daily journey, just have fun on your Music Trip with the SR25.
In addition to 24-bit music playback via aptXTM HD Bluetooth as in previous Astell&Kern players, the SR25 adds LDAC support to give users more options to listen to high resolution audio wirelessly.
Now you can enjoy Astell&Kern's high-quality sound when paired to Bluetooth earphones, headphones and speakers.
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 their products that no other manufacturer can match.
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 customises Android to provide a fully optimised system and user interface, designed to give users a smooth, fluid musical playback experience.
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 mqa.co.uk 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.
The new design of A&norma SR25 incorporates drastic changes without losing the balance between an optimal user experience, looks and keeping the A&norma design identity. The harmonious combination of these various design aspects symbolise the rhythmic feel and freedom of music.
The player features layers of various sized rectangular surfaces with added angles to invoke the sense of pulsating musical rhythm from its design. Precisely milled cuts resemble various reflections of light and create a depth of space around the volume wheel that further emphasizes the bold light reflections that are created at different angles of view.
On the back, the bold oblique cut surface of the rear glass meets the triangular shapes that surround the volume wheel. The patterns of the rear glass beautifully express the spreading of light when it is reflected off the surface. The rhythmic pattern on the rear glass will change as light is reflected at different angles.
The new SR25 is ideal for one-handed operation and is a perfect fit no matter which hand you choose to hold it in. The angle of the front screen and extra space around it gives you the perfect grip when it's held.
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