Home Reviews Astell&Kern A&norma SR25 Review

Astell&Kern A&norma SR25 Review

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Product Specifications

Astell&Kern A&norma SR25

General Specifications
– Body colours:Moon Silver, Oynx Black
– Body material:Aluminum
– Display:3.6 inch WVGA (720 x 1,280) TFT LCD
– DAC:Cirrus Logic CS43198 x2 (Dual DAC)
– CPU:Quad-Core
– Input:via USB-C Port
– Wi-Fi:802.11 b/g/n (2.4GHz)
– Dimensions:63.5 mm (2.5 “) [W] x 108.3 mm (4.26 “) [H] x 16.1 mm (0.63 “) [D]
– Weight:about 178 g (6.27 oz)
– Feature enhancements:Firmware upgrades supported (via OTA)
 
Audio Specifications
– 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 : 8 kHz ~ 384 kHz (8/16/24/32 bits per Sample) /
DSD Native: DSD64(1 bit 2.8 MHz), Stereo / DSD128 (1 bit 5.6 MHz), Stereo / DSD256 (1 bit 11.2 MHz), Stereo
– Output Level:Unbalanced 2.0 Vrms / Balanced 4.0 Vrms (Condition No Load)
– Decoding:Support up to 32 bit / 384 kHz Bit-to-Bit Playback
– Output:Unbalanced Out (3.5 mm) / Balanced Out (2.5 mm, only 4-pole supported)
– Frequency Response:±0.014 dB (Condition: 20 Hz~20 kHz) Unbalanced / ±0.011 dB (Condition: 20 Hz~20 kHz) Balanced
±0.10 dB (Condition: 20 Hz~70 kHz) Unbalanced / ±0.12 dB (Condition: 20 Hz~70 kHz) Balanced
– Signal to Noise Ratio:122 dB @ 1 kHz, Unbalanced / 123 dB @ 1 kHz, Balanced
– Crosstalk:-138 dB @ 1 kHz, Unbalanced / -144dB @ 1 kHz, Balanced
– THD+N:0.0007% @ 1 kHz, Unbalanced / 0.0008% @ 1 kHz, Balanced
– IMD SMPTE:0.0004% 800 Hz 10 kHz(4:1) Unbalanced / 0.0003% 800 Hz 10 kHz(4:1) Balanced
– Output impedance:Unbalanced Out 3.5 mm (1.8 ohms) / Balanced out 2.5 mm (1.6 ohms)
 
Clock source
– Clock jitter:25 ps (Typ)
– Reference clock jitter:200 Femto Seconds
 
Memory
– Built-in memory:64 GB [NAND]
– External memory:microSD (Max. 1TB) x1
 
Battery Specifications
– Capacity:3,150 mAh 3.7 V Li-Polymer Battery
– Charging time:About 2.5 hours (Standard – 5 V / 2 A Charging)
– Battery life:– About 21 hours (Standard – MUSIC: FLAC, 16-bit/44.1kHz, Unbalance, Volume 50, EQ OFF, LCD OFF)
– Battery charging method:via USB-C Port
 
Bluetooth Specifications
– Bluetooth version:4.2
– Bluetooth codec supported:aptX HD / LDAC
 
What’s in the Box
– A&norma SR-25
– USB-A to USB-C cable
– Protective film
– microSD card slot cover
– Quick start guide
– Warranty card
– Price:– SGD 1,099
– USD 699
 

For more information, visit Astell&Kern’s Website

Part 1: Introduction, Design & Build
Part 2: Usability
Part 3: Sound Quality
Part 4: Product Specifications
Part 5: Review Ratings, Summary

6 COMMENTS

    • The SR25 would underpower the HD650; my recommendation is to have the HD650 powered by a desktop DAC/Amplifier or a desktop amplifier. Alternatively, if you prefer something portable, you can try the FiiO M15

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