Astell&Kern SR25 MKII 64GB Mercury Hi-Fi Music Player

Power Source in Your Pocket

Staying true to Astell&Kern 's core values, high-performance Hi-Fi sound is at the heart of the SR25 MKII, offering exceptional audio performance to the music lovers of a wide variety of genres. The most distinctive feature of the Astell&Kern A&norma product line is their compact structure. However, the SR25 MKII delivers more detailed sound than its predecessor, allowing every instrument and vocal note to come through clearly.

The SR25 MKII features Qualcomm® aptX™ HD that supports and delivers true audiophile audio performance, as well as providing versatile connectivity options with a 4.4mm balanced output added for the first time to an A&norma player.

The SR25 MKII preserves everything we love about the SR25 and adds new design features. It will produce the best audio performance anytime, anywhere.

Meet the A&norma SR25 MK-II.

• The SR25 MKII is a Premium product with real sound volume.
• It has improved audio performance compared to the SR25.
• With the addition of 4.4mm Balanced output support, it offers versatile connectivity options.
• Energy efficient design for 20 hours of continuous playback
• Supports two-way Bluetooth and high-definition codecs (Qualcomm® aptX™ HD, LDAC)
• ReplayGain automatically maintains a constant volume.

Performance Mode for Ultra High-Resolution Audio

Not all DACs sound the same. Being aware of this, we seek a more contemporary and new sound in every new model. Compared to its predecessor, the SR25, the SR25 MKII offers improved performance in bass response, dynamic range, soundstage, image rendering and more.

The SR25 MKII uses Astell&Kern's latest sound design technologies to deliver a clear, high definition and natural upper and lower frequency range, giving listeners a deeper, more full-bodied sound .

Bit-to-bit playback (Bit-to-Bit) is available on the SR25 MKII up to 32-bit 384 kHz. True to the artist's original intent, Native DSD audio type is available up to 11.2 MHz for uncompressed audio performance in high resolution and with minimal distortion.

Moreover, the device, which offers flawless playback performance up to 32 bit/384 kHz with native DSD256 , will allow you to enjoy your music even more.

Multiple Output Options

The SR25 MKII supports 4.4mm balanced output. You can connect an even wider range of devices with 2.5mm, 3.5mm and 4.4mm output options.

The 4.4mm balanced output provides an enhanced dynamic range and bass response, while a wide soundstage delivers a clear image and fine musical detail from the sound source.

Enjoy your music without worrying about how to listen to it.

Silver Plated Protective Armor

Astell&Kern products have protective shields to prevent acoustic noise and electromagnetic interference from affecting the sound block when countless parts are working at the same time.

The SR25 MKII has taken the protection philosophy required to achieve excellent audio performance one step further by redesigning existing shields with a highly conductive, dense pure silver coating.

No need to worry about battery life.

Thanks to its re-optimized, energy-efficient circuitry , the SR25 MKII can play music continuously for up to 20 hours* on a single full charge.

Enjoy your own personal music world anytime, anywhere with the extended playtime and portability of the SR25 MKII.

* Music in FLAC format, 16 bit, 44.1 kHz, unbalanced, volume at 50, EQ Off, LCD Off

* Playback time may also vary depending on user environment.

Wireless Hi-Fi Audio with BT Sink

The newly introduced BT Sink feature connects the SR25 MKII to an external device via Bluetooth, similar to connecting a smartphone to a BT speaker. Music from an external device such as a smartphone can now be played at high performance on the SP2000T using the BT Sink function.

ReplayGain Adjusts Playback Volume Automatically and Evenly

ReplayGain, which adjusts sound sources of different volumes to the same level, has been applied to this unique music player. Now, with the ReplayGain feature on the SP2000T, enjoy your own playlists knowing you'll have no issues with it.

* ReplayGain supports audio sources up to 24-bit/192 kHz.

AK File Drop to Enjoy Wireless Streams

The new “ AK File Drop ” feature on the SP2000T makes file transfers easier and more convenient. Using AK File Drop, you can freely transfer files wirelessly via a PC, smartphone or FTP program on the same network. Music file management is now possible with a wireless solution.

DESIGN

The A&norma SR25 MKII inherits the overall design identity of the A&norma SR25 and emphasizes the rhythmic freedom of music through the harmonious combination of new design elements.

The top and bottom edges of the bezel are angled to give the impression of a smaller rectangle floating freely inside the case. The pattern on the side is designed to draw attention to the volume up/down wheel, which gives the impression of a sound wave .

TECHNICIAL SPECIFICATIONS

• Model: SR25 MKII
• Main Body Color: Mercury Silver
• Main Body Material: Aluminum
• Display: 6inch HD (720 x 1,280) TFT LCD
• Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA
• Sampling Rate:
  • PCM: 8kHz ~ 384kHz (8/16/24/32bits Per Sample)
  • DSD Native: DSD64(1bit 2.8MHz) Stereo and DSD128 (1bit 5.6MHz) Stereo, DSD256 (1bit 11.2MHz), Stereo
• Output Level:
  • Unbalanced: 0Vrms
  • Balanced: 0Vrms (No Load)
• Number of Processors: Quad-Core
• DAC Type and Number: Cirrus Logic CS43198 x2 grain (Dual DAC)
• Resolution : Up to 32bit / 384Hz Bit-to-Bit Playback
• Inputs: USB Type-C (For Charging & PC & MAC)
• Outputs:
  • Unbalanced Output: 5mm jack,
  • Balanced Output: 5mm (only 4-pole supported), 4.4m (only 5-pole supported)
• Wi-Fi: 11 b/g/n (2.4GHz)
• Bluetooth: 2 (A2DP, AVRCP, Qualcomm®aptXTM HD, LDAC)
• Dimensions: 5mm [W] x 108.3mm [H] x 16.1mm [D]
• Weight: ~ 178g
• Working Range: 0℃ ~ +40℃
• Frequency range:
  • Unbalanced: ±0.011dB (20Hz~20kHz), ±0.012dB (20Hz~70kHz)
  • Balanced: ±0.014dB (20Hz~20kHz), ±0.010dB (20Hz~70kHz)
• STNR (Signal to Noise Ratio):
  • Unbalanced: 121dB @ 1kHz
  • Balanced: 123dB @ 1kHz
• Crosstalk:
  • Unbalanced: -138dB @ 1kHz
  • Balanced: -144dB @ 1kHz
• THD+N (Total Harmonic Distortion):
  • Unbalanced: 0006% @ 1kHz
  • Balanced: 0005% @ 1kHz
• IMD SMPTE:
  • Unbalanced: 0004% 800Hz 10kHz(4:1)
  • Balanced: 0003% 800Hz 10kHz (4:1)
• Output Impedance:
  • Unbalanced: 5mm (1.2 ohms)
  • Balanced: 5mm (1.8 ohm), 4.4mm (1.7 ohm)
• Clock Jitter Value: 25ps (Typical)
• Reference Clock Jitter Value: 70ps
• Battery Capacity: 3,150mAh 3.7V Li-Polymer Battery
• Usage Time: Up to 20 hours with a single battery (Standard: FLAC, 16bit/44.1kHz, Unbalanced Output, Volume Value 50, EQ Off, LCD On)
• Charging Time: Up to 5 hours (Standard – 5V/2A Normal Charge)
• Internal Memory: 64GB [NAND]
• External Memory: microSD (Max. 1TB) x1
• Supported Operating Systems: Windows 8,10 (32/64bit), MAC OS X 10.7 and above