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Key Features
The Astell & Kern SEM 4 DAC Module is the latest offering of optional modules for the A&futura SE180 audio player. With the ability to play high-resolution audio files up to 32-bit/768kHz PCM and native DSD512, you get to hear your favourite tracks as the producer intended. What sets the SEM4 apart is the Digital Audio Remaster function that, no matter what file you're playing, upscales to a higher sample rate that suits the source making previously unheard details flourish and breathe new life into your music. Audio will sound full and natural with lower noise and distortion artefacts with up to 14 hours of playtime, the longest of any of the SE180 modules.
Please note: Images are for demonstration purposes only, there is no media player supplied with this product.
Product Ref: 231639
Specially developed and a first for the SEM4, your audio is upscaled to a maximum PCM sample rate of 384 kHz/DSD256. This is not exclusive to certain file types, no matter what you choose to play the SEM4 will convert to a higher sample rate for enhanced audio resulting in refined and rich sonic perfection with nuances that otherwise would go unheard.
The SEM4 is the first module to be equipped with a dual AK4493SEQ DAC from Asahi Kasei. Loaded with VELVET SOUND technology, more natural audio is assured with lower distortion and noise artefacts for pure, clean audio. Specifically selected for the SEM 4 the switch and capacitor components offer up a lower power consumption for hi-res playback for up to 14 hours - the longest of all the SE180 modules.
Astell&Kern have worked tirelessly to deliver a sound that is closer than ever to the original sound. TERATON ALPHA removes power noise and makes the consumption and amplification more efficient right up to the audio output interface stage where the digital-to-analogue signal conversion (DAC) takes place
Model | SEM3 DAC module |
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Body Material | Aluminum, Stainless Steel, Polycarbonate |
Body Colour | Moon Silver |
Sample Rate | PCM: 8kHz ~ 768kHz (8/16/24/32bits per Sample)DSD Native: DSD64(1bit 2.8MHz), Stereo / DSD128(1bit 5.6MHz), StereoDSD256(1bit 11.2MHz), Stereo / DSD512(1bit 22.4MHz), Stereo |
Outputs | Unbalanced Out (3.5mm), Balanced Out (2.5mm, only 4-pole supported / 4.4m, 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 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 | 90g |
Playback Time | About 14hours (Standard: FLAC, 16bit, 44.1kHz, Unbalanced, Vol.50, LCD Off) |
Maximum upsampling PCM rate | 44.1kHz range PCM will be converted to 352.8kHz for playback48kHz range PCM will be converted to 384kHz for playbackNo conversion will be made when playing DSD with this option selected |
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Maximum DSD upsampling rate | PCM files lower than 96kHz will be converted to DSD128 for playbackPCM files over 96kHz will be converted to DSD256 for playbackDSD files below DSD256 will be converted to DSD256 for playback with this option selected |
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 |
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S/N | [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) |
Product code | AK1046 |
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