Astell&Kern SR 35

General informations

A&norma SR35 the new entry-level DAP by Astell&Kern

A Digital Audio Player equipped with quadruple DAC and optimized in all respects for Hi End listening, MQA compatible and Roon ready.
SR35 is the new entry level DAP Digital Audio Player from Astell & Kern, the Korean company that has always specialized in the creation of uncompromising portable products.

CS43198 Quad DACs	2-Step gain	aptX™-HD ldac extension	MQA extension Full Decoder	Dual Band Wifi	Roon Ready	20hrs Playbacks

The SR35, which takes the place of the SR25MKII , represents a prestigious starting point for entering the world of high quality portable Hi-Fi signed by Astell&Kern.
A&norma benefits from the modern touch screen graphic interface on a 3.6" 720x1280 TFT LCD HD display , immediately appreciated for its simplicity and intuitiveness, as well as for its very captivating aesthetic appearance.

The touch-screen, like all the functions of the A&norma SR35, is governed by a new latest generation quad-core CPU useful both for processing audio signals faster and at the same time giving immediate access to the user interface.

The chassis is made entirely of aluminum turned from solid with a machine capable of working on 5 axes simultaneously, using the same technique that is applied in the construction of high-end watch cases, a particularity of A&K which ensures maximum rejection from any I disturb.

The SR35's new circuitry is also optimized to generate as little noise as possible, from the new filters to the PCB signal path. Design-wise, the new SR35, while similar to the retiring SR25MKII, has a newly designed volume knob that is more manageable and partly inspired by the SA700.

SR35 employs a quadruple DAC

A rarity for portable devices MasterHIFI™ Cirrus Logic CS43198, a chip, according to A&K, capable of returning an extremely accurate reproduction of music played live. It is possible to select the operation of the dac section in both quadruple and dual mode. When properly coupled to an analog output stage of a similar level, as in the SR35, this chip is unrivaled.

The amplification section is no different. Separate Next Generation Amp amplifiers with Teraton Alpha technology are used, where it is possible to select the output gain based on the connected headphones on two values: normal or high.

Via the USB connection, the SR35 can be used as a digital music hard disk storage and/or preamplifier with digital output , and has an internal memory of 64GB expandable up to 1tb via a microSD slot.

It features dual band WiFi connectivity with DLNA streaming via AK Connect App, and Bluetooth 5.0 aptX HD . The headphone output is with a 3.5mm jack and two further balanced outputs are available on 4-pole 2.5mm and 5-pole 4.4mm jacks .

Technical features

The A&norma SR35 plays any digital file up to 32-bit/384kHz resolution, bit-to-bit. While native DSD files are played up to 256/11.2MHz while higher resolutions are converted to PCM . SR35 is also MQA compliant and Roon ready.

• Display: 720x1280 TFT-LCD
• Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA
• Freq. of sampling:
  - PCM: 8kHz ~ 192kHz (8/16/24/32bits per Sample)
  - DSD Native: up to DSD256 (1bit 11.2MHz), Stereo
  - DSD to PCM: DSD128 (1bit 5.6MHz)
• Exit:
  - (Normal) Unbalanced 2.1Vrms / Balanced 4.0Vrms (no load)
  - (High) Unbalanced 3.1Vrms / Balanced 6.0Vrms (no load)
• DAC: Cirrus Logic CS43198 x4 (Dual DAC)
• Decoding: Supports up to 32bit / 384kHz Bit to Bit Decoding
• Input: USB Type C for charging & data transfer (PC & MAC)
• Outputs: Headphone (3.5mm) / Balanced (2.5mm, 4-pole and 4.4mm, 5-pole)
• Wi-Fi: 802.11 a/b/g/n/ac (2.4GHz and 5GHz)
• Bluetooth: V5.0 (A2DP, AVRCP, aptXtm HD, LDAC)
• Dimensions (WxHxD): 64 x 108.3 x 16.1mm
• Weight: about 184gr
• Updates: Firmware upgrades (OTA)
• Frequency Response: ±0.012dB Unbalanced / ±0.011dB Balanced (20Hz~20kHz)
• Signal/Noise: 127dB @ 1kHz unbalanced, 130dB @ 1kHz balanced
• Crosstalk: -133dB @ 1kHz unbalanced -145dB @ 1kHz balanced
• THD+N: 0.0005% @ 1kHz, unbalanced / 0.0006% @ 1kHz, balanced
• IMD SMPTE: 0.0002% 800Hz 10kHz(4:1) unbalanced & balanced
• Output impedance: Balanced out 2.5mm,4mm (2.7ohm) / headphone 3.5mm (1.1ohm)
• Battery: 3,150mAh 3.7V Li-Polymer Battery
• Autonomy about 20 hours
• Recharge 2.5 hr (with standard 5V/2A charger)
• Memory: Internal 64GB , external microSD (Max 1TB) x1
• Supported systems: Windows 10, 11 (32/64bit) MAC OS X 10.7 and above
• Chassis: Aluminum.