Astell&Kern SR25 mobil afspiller

Astell&Kern SR25 er hvor man starter med Astell&Kern's univers af fantastiske mobile musikafspillere. Når man ser på specifikationerne, funktioner og ydelsen er prisen nærmest chokerende rimelig - et par gode hovedtelefoner og nydelsen er på plads.

64Gb indbygget hukommelse med mulighed for at supplere med microSD kort (Max. 1TB)

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General Specifications
Model: SR25
Body Color: Moon Silver
Body Material: Aluminum
Display: 3.6inch WVGA (720 x 1,280) TFT LCD
Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA
MQA playback: Services(Tidal Masters), Local files, External USB, MQA-CD(ripped)
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 2.0Vrms / Balanced 4.0Vrms (Condition No Load)
DAC: Cirrus Logic CS43198 x2 (Dual DAC)
CPU: Quad-Core
Decoding: Support up to 32bit / 384kHz Bit-to-Bit Playback
Input: USB Type-C input (for PC & MAC)
Outputs: Unbalanced Out (3.5mm) / Balanced Out (2.5mm, only 4-pole supported)
Wi-Fi: 802.11 b/g/n (2.4GHz)
Bluetooth: V4.2 (A2DP, AVRCP, 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)

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 / 123dB @ 1kHz, Balanced
Crosstalk: -138dB @ 1kHz, Unbalanced / -144dB @ 1kHz, Balanced
THD+N: 0.0007% @ 1kHz, Unbalanced / 0.0008% @ 1kHz, Balanced
IMD SMPTE: 0.0004% 800Hz 10kHz(4:1) Unbalanced / 0.0003% 800Hz 10kHz(4:1) Balanced
Output Impedance: Unbalanced Out 3.5mm (1.8ohm) / Balanced out 2.5mm (1.6ohm)

Clock source
Clock Jitter: 25ps(Typ)
Reference Clock Jitter: 200 Femto Seconds

Battery
Capacity: 3,150mAh 3.7V Li-Polymer Battery
Continuous Playback Time: About 21 hours (Standard - MUSIC: FLAC, 16-bit/44.1kHz, Unbalance, Volume 50, EQ OFF, LCD OFF)
Charge Time: About 2.5 hours (Standard - 5V/2A Charging)

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

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

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The New Hi-Fi Standard, A&norma SR25
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:
- Adding a new, faster Quad-Core CPU paired with the Dual Cirrus Logic CS43198 Master Hi-Fi level DAC, first used on the SR15
- Native playback support for DSD256
- A new class-leading performance mode for ultra-high quality playback without compromise
- Newly designed circuitry to improve sound quality enhancements
- Addition of Bluetooth LDAC codec to give users more options for higher quality wireless sound

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.

Performance Mode for Ultra High Resolution Sound
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.
We have developed a new Performance Mode with the SR25 that automatically optimizes 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 optimized, 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.

Perfect Circuit Design for the Highest Sound Quality
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.

Optimizing 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.