Astell&Kern SR25 MKII

Faithful to Astell&Kern’s core values, high-fidelity sound is at the heart of the SR25 MKII, delivering exceptional audio performance to a wide 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 delivers more detailed sound than its predecessor, allowing for clear expression of each 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-quality sound. The SR25 MKII retains everything we love about the SR25 and adds new design features. It will produce the best sound quality anywhere, anytime.

Not All DACs Sound the Same

The SR25 MKII delivers improved performance at every level 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, natural high-resolution sound with more clearly defined upper and lower ranges, providing listeners with a deeper, more well-rounded sound.

Bit-to-bit playback is available in models up to the SR25 MKII 32-bit 384 kHz. Native DSD audio is available up to 11.2 MHz, for uncompressed sound quality true to the artist’s original intent, in high resolution and with minimal distortion. With smooth playback performance supporting native DSD256 up to 32-bit/384kHz, you’ll enjoy your music even more.

Excellent Continuous Playback Time

No need to worry about battery life. The SR25 MKII can play continuously for 20 hours on a single full charge, thanks to its optimized, energy-efficient circuitry. Enjoy your own personal music performance anytime, anywhere with the SR25 MKII’s extended playback time and portability.

• Quad-Core CPU
• Dual Cirrus Logic CS43198 DACs
• 3.6-inch HD TFT LCD screen (720 x 1,280)
• ReplayGain automatically maintains consistent volume
• 2Vrms unbalanced / 4Vrms balanced output level (no-load condition)

Compatible Formats

• Supported audio formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA
• PCM sampling rates: 8 kHz ~ 384 kHz (8/16/24/32 bits per sample) / Native DSD: DSD64 (1bit 2.8MHz), Stereo / DSD128 (1bit 5.6MHz), Stereo / DSD256 (1bit 11.2MHz), Stereo
• Decoding: Supports bit-to-bit playback up to 32-bit/384kHz

Battery

• Capacity: 3,150 mAh 3.7V Li-polymer battery
• Continuous playback time: Approx. 20 hours (Standard: FLAC, 16bit, 44.1kHz, Unbalanced, Vol.50, EQ Off, LCD Off)
• Charging time: Approx. 2.5 hours (standard 5V 2A charging)

Audio Performance

• Frequency response:
  • ± 0.014 dB (Condition: 20Hz~20kHz) Unbalanced
  • ± 0.011 dB (Condition: 20Hz~20kHz) Balanced
  • ± 0.10 dB (Condition: 20Hz~70kHz) Unbalanced
  • ± 0.12 dB (Condition: 20Hz~70kHz) Balanced
• Signal-to-noise ratio:
  • 122 dB @ 1kHz, unbalanced
  • 124 dB @ 1kHz, balanced
• Crosstalk:
  • -138 dB @ 1kHz, unbalanced
  • -144 dB @ 1kHz, balanced
• THD+N:
  • 0.0006% @ 1kHz, unbalanced
  • 0.0005% @ 1kHz, balanced
• IMD SMPTE:
  • 0.0004% 800Hz 10kHz (4:1) unbalanced
  • 0.0003% 800Hz 10kHz (4:1) balanced
• Output impedance:
  • 3.5mm unbalanced output (1.2 ohms)
  • 2.5mm balanced output (1.8 ohms), 4.4mm (1.7 ohms)

Connectivity

• USB Type-C input (for charging, PC and MAC)
• Unbalanced output (3.5mm)
• Balanced output:
  • 1x 2.5mm, only 4-pole supported
  • 1x 4.4mm, only 5-pole supported
• Wi-Fi 802.11 b/g/n (2.4 GHz)
• Bluetooth V4.2 (A2DP, AVRCP, Qualcomm aptX HD, LDAC)
  • Supports two-way Bluetooth

Memory

• Built-in memory: 64 GB [NAND]
• External memory: microSD (max. 1 TB) x1

General

• Dimensions (W x H x D): 63.5 x 108.3 x 16.1 mm
• Weight: Approx. 178 g