S.M.S.L. M400 MQA
| Model | AK4499 |
| PCM | 32Bit/768kHz |
| DSD | DSD512 |
| MQA | YES |
| USB Bridge | XMOS XU216 |
| Recommended | YES, good audio, rich features, heat issue during our tests, reliability must be watched, clean/quiet beetween PCM<>DSD, no trigger 12v, basic and limited remote control |
| Ratings | |
| Reviewed |  |
High-fidelity MQA audio DAC
Support MQA decoding.
Flagship DAC chip AK4499, the audio industry’s highest performance.
The THD+N is as low as 0.000068% (-123dB)!
When using A-weighted measurement, it is as low as 0.000058% (-124dB)！
Dynamic range up to 131dB!
USB uses the second XMOS XU216,support native DSD and 32bit 768kHz!
The clock system uses 2 ACCUSILICON ultra-low phase noise crystal oscillators.
Using ALTERA’s high-speed CPLD to process the clock and reduce the JITTER.
Specially designed and enhanced power supply system provides ultra-low noise power supply with output noise as low as 1.5uVrms!
The latest Bluetooth supports LDAC, APTX / HD, SBC, AAC and the industry’s highest specification 24bit / 192kHz UAT format!
Support LVDS level differential I2S reception (using HDMI interface), it can accept the lowest jitter digital audio!
Users can update the system and USB firmware through the USB interface.
Using color LCD screen and newly developed user interface, full-function remote control.
Use USA ti’s opa1611, opa1612 top-level op amp.
Using lots of audiophile grade components, high precision, low temperature drift and resistors and capacitor!
Specifications
Input ………………………………………….. USB / Optical / Coaxial / I 2S / Bluetooth
Output ……………………………………………………………………………. RCA /XLR
THD+N ……………………………………………………………….0.000068%(-123dB)
…………………………………………………………….. 0.000058%(-124dB) (A-WTD)
Dynamic range ………………………………………………………… XLR 131dB
RCA 125dB
SNR ……………………………………………………………………………………. 131dB
USB transmission ……………………………………………………….Asynchronization
USB compatibility ………………………Windows 7 / 8 / 8.1 / 10, Mac OSX、 Linux
Bit depth ………………………………USB / I 2S 1bit， 16 ~ 32bit
Optical / Coaxial 1bit， 16 ~ 32bit
Sampling rate …………………………USB / I 2S PCM 44.1 ~ 768kHz
DSD 2.8224 ~ 22.5792MHz
Optical / Coaxial PCM 44.1 ~ 192kHz
Bluetooth specification：
UAT ………………………………………24bit/192kHz (1200kbps/900kbps/600kbps)
LDAC ………………………………………..24bit/96kHz (990kbps/660kbps/330kbps)
aptX-HD …………………………………………………………..24bit/48 kHz_576kbps
aptX ……………………………………………………………..16bit/44.1 kHz_352kbps
SBC ………………………………………………………………16bit/44.1 kHz_328kbps
AAC ………………………………………………………………16bit/44.1 kHz_320kbps
Power Consumption ……………………………………………………………………….5W
Standby power ……………………………………………………………………….. <0.5W
Size ……………………………………………………………220X215X43mm (WxHxD)
Weight ………………………………………………………………………………… 1.53kg