SMSL DO400 ES9039MSPRO Fully-Balanced Audio Decoder and Headphone Amplifier with XMOS XU316, PLFC, and Bluetooth LDAC

Regular price: $3,990.70
Regular price
Sale price: $3,990.70

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Product Highlights

· ESS ES9039MSPRO flagship 8-channel DAC chip

· XMOS XU316 3rd-gen USB with PCM 32-bit/768kHz and DSD512

· PLFC ultra-low distortion headphone amp: 0.0001% THD+N @ 16 Ohm

· Full MQA and MQA-CD hardware decoding

· Six inputs: USB, Bluetooth, Optical, Coaxial, AES/EBU, I2S (HDMI)

· Three headphone outputs: 4.4mm, 6.35mm, and 4-pin XLR

· Balanced XLR and RCA line outputs

· Bluetooth 5.1 Qualcomm with LDAC, aptX HD, AAC, SBC

· Suspended tempered glass display with retro knob and remote

Flagship ES9039MSPRO DAC with Fully-Balanced Headphone Amplifier

The SMSL DO400 is a high-performance fully-balanced audio decoder and headphone amplifier built around ESS Technology's flagship ES9039MSPRO 8-channel DAC chip. With the 3rd-generation XMOS XU316 USB interface supporting PCM 32-bit/768 kHz and native DSD512, full MQA and MQA-CD decoding, Qualcomm Bluetooth 5.1 with LDAC, PLFC ultra-low distortion headphone amplification achieving 0.0001% THD+N, six digital inputs including I2S and AES/EBU, and three headphone outputs alongside balanced XLR and RCA line outputs, the DO400 combines reference-grade conversion with powerful headphone drive capability in a single elegant desktop chassis.

ESS ES9039MSPRO: Flagship 8-Channel DAC

The ES9039MSPRO is ESS Technology's current flagship DAC chip, featuring 8 independent channels of conversion in a fully-differential architecture. This silicon delivers extraordinary dynamic range, vanishingly low distortion, and the spatial precision that defines reference-grade digital playback. Every format from CD-quality to high-resolution PCM and DSD is rendered with the transparency and tonal accuracy that this converter is capable of.

PLFC Ultra-Low Distortion Headphone Amplifier

SMSL's Precision Linear Feedback Circuit delivers clean, powerful output through three dedicated headphone connections. Distortion is held to just 0.0001% under a 16-ohm load, while output power scales from 350 mW for efficient IEMs to a substantial 3 watts for demanding planar magnetic and high-impedance dynamic headphones. Whether you listen through sensitive in-ear monitors or power-hungry full-size headphones, the DO400 provides the headroom and control your music demands.

XMOS XU316 with Full Format Support

The 3rd-generation XMOS XU316 USB processor enables bit-perfect asynchronous transfer supporting PCM up to 32-bit/768 kHz and native DSD512. Full MQA and MQA-CD hardware decoding reconstructs studio-authenticated master-quality audio from compatible streams and discs, delivering the three-dimensional sound field and spatial accuracy that MQA technology enables.

Six Digital Inputs for Maximum Flexibility

The DO400 accommodates virtually any digital source: USB, Bluetooth 5.1, Optical, Coaxial, AES/EBU, and I2S (HDMI LVDS). Balanced XLR and single-ended RCA line outputs feed power amplifiers or active speakers, while 4.4mm balanced, 6.35mm single-ended, and 4-pin XLR headphone outputs provide every connection standard for personal listening.

Qualcomm Bluetooth 5.1 with LDAC

Qualcomm's latest Bluetooth 5.1 platform supports LDAC, aptX HD, aptX, AAC, and SBC codecs for high-resolution wireless streaming. An external antenna ensures stable reception, and the Bluetooth input benefits from the same ES9039MSPRO conversion and PLFC amplification as every wired input.

Suspended Display with Retro-Inspired Design

A suspended tempered glass display window paired with a precision-machined retro-style volume knob gives the DO400 a distinctive aesthetic that bridges classic hi-fi charm with modern digital performance. The full-function remote control provides convenient operation from across the room.

Specifications