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DigitalDACsPre-AmplifiersDiscontinued
Estimated price (community-sourced)
$498
Around — community and catalog average, updates slowly
About the M400
The SMSL M400 is a desktop digital-to-analog converter and preamplifier built around an AKM AK4499EQ DAC and an XMOS XU216 USB interface. It accepts USB, optical, coaxial, I²S over HDMI, and Bluetooth inputs, and provides balanced XLR and unbalanced RCA analog outputs. It supports MQA decoding, PCM up to 32-bit/768 kHz, and native DSD512. Bluetooth 5.0 supports codecs including UAT, LDAC, aptX HD, and AAC. The unit also includes a color display and remote control.
Specifications
DAC chip: AKM AK4499EQ; USB interface: XMOS XU216; Inputs: USB-B, optical, coaxial, I²S via HDMI, Bluetooth 5.0; Outputs: balanced XLR, unbalanced RCA; Supported formats: PCM up to 32-bit/768 kHz, native DSD512; MQA: full decoding; Bluetooth codecs: UAT, LDAC, aptX HD, AAC; THD+N: 0.000058% (A-weighted); Dynamic range: up to 131 dB; SNR: up to 131 dB; Dimensions: 215 × 220 × 43 mm; Power consumption: 5 W.