AK 4499 DAC, SMSL M400, MQA, USB Preamp DAC, Bluetooth, I2s Optical Coaxial. One of the best measuring DACs on ASR. Subjectively the Velvet Sound AKM AK4499 is much acclaimed.Complete with all original packing and accessories.This model is unmarked and as new, from a smoke and pet free home.UK sale only. Features of SMSL M400:>Full MQA Decoding.>Industry Leading High-Performance AK4499 DAC Chip.>THD+N: 0.000058%(-124dB).>Dynamic Range: 131dB.>Signal to Noise Ratio: 131dB.>Second Generation 16-core XMOS XU216 USB Receiver.>PCM Decoding up to 32-Bit/768kHz, DSD up to DSD512 natively.>Dual Independent ACCUSILICON crystal oscillators.>ALTERA’s High-Speed Clock to process clock and Jitter free conversion.>Powerful OPAMP’s, featuring OPA1611 and OPA1612.>Ultra Low Noise Floor.>Multiple Input Supported featuring USB, Optical, Co-axial, IIS, and Bluetooth.>Latest Bluetooth V5.0 Support with Ultra Hi-Res codecs including UAT, LDAC, AptX HD, and more.>LCD Color Display.>Fully Operational Remote Control.>Dual Output Ports including Fully Balanced XLR Output, and Unbalanced RCA Output.>Power Consumption: 5W.SMSL released their latest flagship-level Desktop DAC, the SMSL M400. It features industry-leading flagship DAC chip AK4499 paired with high-quality chips to provide the users an unmatched crisp sound decoding output.Industry Leading Chipset:-SMSL M400 features an industry-leading flagship AKM DAC, AK4499 paired with second-generation 16-core XMOS XU216 USB receiver chip and dual independent crystal oscillators. The chipset provides a distortion-free and high-quality sound output rich with details. The M400 is able to decode PCM up to 32-Bit/768kHz, and DSD up to DSD512 natively. Apart from a powerful DAC and USB chip, it also features powerful OPA amp’s, OPA1611 and OPA1612.Unmatched Sound Decoding Quality:-SMSL M400 has an ultra-low distortion rating of 0.000058%(-124dB), high dynamic range and signal to noise ratio of 131dB. The DAC provides an unmatched sound decoding quality. The output has a very clean background completely noise and distortion-free.Multiple Input/Output Ports:-SMSL M400 features multiple input ports. The device features USB, Optical, Coaxial, IIS, and Bluetooth Input modes. The Bluetooth Input supports all the latest Hi-res codecs featuring UAT, LDAC, AptX HD, and More. UAT is the latest high-quality codec developed by HiBy, it features files with 24-Bit/192kHz bitrate and offers the best sound quality streaming over wireless connectivity. The device features two output options, one fully balanced XLR output, and one RCA unbalanced output.PreAMP Mode with Variable Volume Support:-SMSL M400 features Preamp mode, you can use the M400 to provide a clean decoded audio signal further to an amplifier in your chain. The PreAMP mode features two modes, fixed volume, and variable volume.Digital Audio Filters:-SMSL features six different PCM decoding filters including Slow Roll-off, Sharp Roll-off, Short Sharp Roll-off, and more. The device also features two DSD filters, narrow and wide. Users can choose between these filters with ease using the remote control included in the package.LCD Display and Fully Operational Remote Control:-SMSL M400 features an LCD color display on the front that shows basic information like active input type, active bit-rate, and output volume levels. The device is fully operational using the remote control included in the package.