SMSL DO400 Fully Balanced Audio Decoder & Headphone Amplifier ES9039MSPRO DAC

SMSL DO400 | Fully Balanced ES9039MSPRO Desktop DAC & Headphone Amplifier

The SMSL DO400 is an all-in-one fully balanced desktop DAC and headphone amplifier built for audiophiles. Equipped with the flagship ESS ES9039MSPRO chip, full MQA hardware decoding, XMOS XU316 USB processor and PLFC fully balanced amplifier circuit, it provides ultra-low distortion, high-power headphone drive and rich connectivity. Ideal for desktop Hi-Fi, high-end headphones and active speaker systems.

Flagship ESS ES9039MSPRO DAC + Full MQA Decoding
The ESS ES9039MSPRO 8-channel parallel DAC chip supports full MQA and MQA-CD hardware decoding. THD+N as low as 0.00005% (-125dB). It produces an ultra-quiet noise floor, revealing fine musical details with transparent sound.

XMOS XU316 USB Chip & High-Resolution Playback
Powered by 3rd-gen XMOS XU316 asynchronous USB solution. Supports PCM up to 32Bit/768kHz and native DSD512. Fully decodes lossless high-resolution audio and faithfully restores every musical nuance.

Fully Balanced PLFC Circuit with Strong Output Power
4-way fully balanced Precision Linear Feedback Circuit (PLFC). Delivers 6W×2 at 16Ω and 3W×2 at 32Ω. Easily drives hard-to-drive high-impedance flagship headphones with solid dynamics and clean transients.

Bluetooth 5.1 with LDAC Wireless Hi-Fi Streaming
Built-in Bluetooth 5.1 module supports LDAC, aptX HD, aptX, AAC and SBC. Enjoy near-lossless wireless high-res music streaming from smartphones, tablets and other portable sources.

Comprehensive Input & Output Interfaces
Multiple digital inputs: USB, Optical, Coaxial, Bluetooth, HDMI-I2S, AES/EBU.
Outputs: XLR balanced / RCA single-ended line out, plus three headphone ports: 4-Pin XLR, 4.4mm balanced, 6.35mm single-ended.

Premium OPA1612 Op-Amps & CNC Aluminum Chassis
Adopts high-precision OPA1612 op-amps for natural tone balance. CNC-machined aluminum alloy housing offers excellent electromagnetic shielding to suppress background noise.