Astell&Kern SEM2 | All-in-One Module

Use code SE180-COMBO at checkout to get the SEM2 and a SE180 case free with the purchase of a new SE180. 

Shape your Sound with SEM2

SEM2 is an Interchangeable All-in-One module for the SE180. 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).

Circuit Separation Structure of Main Body and Module

By physically separating the main body from the All-in-One module, we completely block power and RF noise that may occur from the main body. This creates an independent structure that prevents noise from interfering with music playback.

Balanced and unbalanced signals are separated for each channel to provide the best possible sound through independent circuit design without interference.

Main

DAC Module

Specs

General Specifications

Product Name
SEM2

Model
PAP12

Body Material
Aluminum, Stainless Steel, Polycarbonate

Body Color
Moon Silver

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)

DAC
AKM AK4497EQ x2 (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
3.53oz (100g)

Operating Temperature
0℃ ~ + 40℃ (32℉~ 104℉)

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

Audio Performance

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

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

THD+N
[Normal Gain] 0.0006% @ 1kHz, Unbalanced / 0.0005% @ 1kHz, Balanced [High Gain] 0.0008% @ 1kHz, Unbalanced / 0.0006% @ 1kHz, Balanced
IMD SMPTE
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)