SEM4 is an interchangeable all-in-one module for the SE180.

With its release, Astell&Kern has expanded the potential of the SE180 once again.
SEM4, born from the key concept of ‘Shape Your Sound’ is equipped with the AK4493SEQ dual DAC, the latest DAC from Asahi Kasei, which minimizes loss and noise interference from the original sound while offering 14 hours of playback performance — the longest among SEM modules.

SEM4 supports up to 32bit/768kHz, Native DSD512 and you will be able to enjoy even more vivid, original sound with the introduction of digital audio remaster (DAR) technology.



Specification:
Housing Material: Aluminum, Stainless Steel, Polycarbonate
Sample Rate:
PCM: 8kHz ~ 768kHz (8/16/24/32bits per Sample)
DSD Native: DSD64(1bit 2.8MHz), Stereo / DSD128(1bit 5.6MHz), Stereo
DSD256(1bit 11.2MHz), Stereo / DSD512(1bit 22.4MHz), Stereo
Output: Unbalanced Out (3.5mm), Balanced Out (2.5mm, only 4-pole supported / 4.4mm, only 5-pole supported)
Output Level:
[Normal Gain] Unbalanced 2Vrms / Balanced 4Vrms (Condition No Load)
[High Gain] Unbalanced 3Vrms / Balanced 6Vrms (Condition No Load)
Digital-Analog Converter: AKM AK4493SEQ x 2 (Dual DAC)
Decoding: Support up to 32bit / 768kHz Bit-to-Bit playback
Dimensions: 3.03"(77mm) [W] x 2.99"(76mm)[H] x 0.78"(19.9mm)[D]
Weight: 3.17oz (90g)
Operating Temperature: 0℃ ~ + 40℃ (32℉~ 104℉)
Playback Time: about 14hours (FLAC, 16bit, 44.1kHz, Vol.50, LCD Off)
Frequency Response:
±0.09dB (Condition: 20Hz~20kHz) Unbalanced / ±0.04dB (Condition: 20Hz~20kHz) Balanced
±0.65dB (Condition: 20Hz~70kHz) Unbalanced / ±0.65dB (Condition: 20Hz~70kHz) Balanced
Signal-Noise Ratio:
[Normal Gain] 121dB @ 1kHz, Unbalanced / 121dB @ 1kHz, Balanced
[High Gain] 125dB @ 1kHz, Unbalanced / 125dB @ 1kHz, Balanced
Crosstalk:
Normal Gain] -134dB @ 1kHz, Unbalanced / -138dB @ 1kHz, Balanced
[High Gain] -135dB @ 1kHz, Unbalanced / -143dB @ 1kHz, Balanced
THD+N:
[Normal Gain] 0.0003% @ 1kHz, Unbalanced / 0.0004% @ 1kHz, Balanced
[High Gain] 0.0005% @ 1kHz, Unbalanced / 0.0006% @ 1kHz, Balanced
IMD SMPTE: 0.0003%, 800Hz 10kHz (4:1), Unbalanced / 0.0003%, 800Hz 10kHz (4:1), Balanced
Output Impedance: 3.5mm (1ohm) / 2.5mm (1.5ohm) / 4.4mm (1.5ohm)