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 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
3.6inch 720x1280 touch display
WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF,
DFF, DSF, MQA
Services (Tidal Masters), Local files, External USB, MQA-CD(ripped)
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
CIRRUS LOGIC CS43198 x2 (Dual DAC)
Unbalanced 2.0Vrms / Balanced 4.0Vrms (Condition No Load)
Support up to 32bit / 384kHz Bit-to-Bit playback
USB Type-C input (for PC & MAC)
Unbalanced Out (3.5mm), Balanced Out (2.5mm, only 4-pole supported /
4.4mm, only 5-pole supported)
802.11 b/g/n (2.4GHz)
V4.2 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC)
2.5” (63.5mm)[W] x 4.26” (108.3mm)[H] x 0.63” (16.1mm)[D]
About 6.27oz (178g)
Firmware update supported (OTA)
Body 10g SAR (W/Kg) _ WLAN 2.4Ghz : 0.173
±0.014dB (Condition : 20Hz~20kHz) Unbalanced /
±0.011dB (Condition : 20Hz~20kHz) Balanced
±0.10dB (Condition : 20Hz~70kHz) Unbalanced /
±0.12dB (Condition : 20Hz~70kHz) Balanced
122dB @ 1kHz, Unbalanced / 124dB @ 1kHz, Balanced
-138dB @ 1kHz, Unbalanced / -144dB @ 1kHz, Balanced
0.0006% @ 1kHz, Unbalanced / 0.0005% @ 1kHz, Balanced
0.0004% 800Hz 10kHz(4:1) Unbalanced /0.0003% 800Hz 10kHz(4:1) Balanced
3.5mm (1.2ohm), 2.5mm (1.8ohm), 4.4mm (1.7ohm)
Reference Clock Jitter
Built-in Memory 64GB [NAND]
External Memory microSD (Max. 1TB) x1