SEM2-Module for SE180 (AK4497EQx2)


SEM2 is an Interchangeable All-in-One module for the SE180
Shape your Sound with the Asahi Kasei AK4497EQ Dual DAC SEM2
Give your SE180 a different sound than the bundled module
SEM2 supports up to 32bit/768kHz / Native DSD512

Next generation AMP technology is also applied in the SEM2 all-in-one module.

From the selection of OP-AMP parts, to circuit design, board layout and tuning, everything has been completely redesigned to produce the best sound.

Even with a high output, the signal-to-noise (SNR), one of the important measurements of audio performance, boasts an amazing 127dB (based on AK4497EQ Dual, Balanced, High Gain).

SEM2 for SE180

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


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 AK4497EQ x2 (Dual DAC)


Support up to 32bit / 768kHz Bit-to-Bit playback


3.03"(77mm)[W] x 2.99"(76mm)[H] x 0.78"(19.9mm)[D]


3.53oz (100g)

Operating Temperature

0℃ ~ + 40℃ (32℉~ 104℉)

Playback Time

about 10.5hours (FLAC, 16bit, 44.1kHz, Vol.50, LCD Off)

Frequency Response

±0.07dB (Condition : 20Hz~20kHz) Unbalanced /
±0.06dB (Condition : 20Hz~20kHz) Balanced
±0.68dB (Condition : 20Hz~70kHz) Unbalanced /
±0.67dB (Condition : 20Hz~70kHz) Balanced

Signal-Noise Ratio

[Normal Gain] 122dB @ 1kHz, Unbalanced / 124dB @ 1kHz, Balanced
[High Gain] 125dB @ 1kHz, Unbalanced / 127dB @ 1kHz, Balanced


[Normal Gain] -138dB @ 1kHz, Unbalanced / -145dB @ 1kHz, Balanced
[High Gain] -138dB @ 1kHz, Unbalanced / -147dB @ 1kHz, Balanced


[Normal Gain] 0.0006% @ 1kHz, Unbalanced / 0.0005% @ 1kHz, Balanced
[High Gain] 0.0008% @ 1kHz, Unbalanced / 0.0006% @ 1kHz, Balanced


0.0002%, 800Hz 10kHz (4:1), Unbalanced / 0.0002%, 800Hz 10kHz (4:1), Balanced

Output Impedance

3.5mm (1ohm) / 2.5mm (1.5ohm) / 4.4mm (1.5ohm)


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