S.M.S.L D100 Desktop DAC & Headphone Amplifier
The S.M.S.L D100 is a compact high-resolution desktop DAC and headphone amplifier designed for music lovers seeking clean, detailed sound in a space-efficient form. Built around the ESS ES9081 DAC chip and XMOS XU-316 USB processor, it delivers excellent measured performance, full MQA support across all digital inputs, and a true balanced headphone output up to 400mW, making it an ideal all-in-one solution for desktop listening and active speaker systems.
ESS ES9081 DAC with 8-Channel Parallel Summing
At the heart of the D100 is the ESS Technology ES9081 DAC chip configured with 8-channel parallel summing architecture. This design achieves low distortion of 0.00035% (-109dB) on the RCA line output and a dynamic range of up to 121dB. Paired with the XMOS XU-316 asynchronous USB processor, the D100 supports true 32-bit high-resolution audio and provides transparent, highly resolved sound reproduction.
High-Resolution Audio and Full MQA Decoding
The D100 natively supports PCM up to 32-bit/768kHz and native DSD512 via USB. Optical and coaxial inputs handle PCM up to 24-bit/192kHz. Full MQA decoding is available across all digital inputs—USB, optical, and coaxial—allowing users to enjoy master-quality audio from streaming services, MQA-CDs, and digital transports without compromise.
True Balanced Headphone Amplifier
Featuring a true balanced headphone amplifier circuit, the D100 offers both 4.4mm balanced and 6.35mm single-ended outputs. It delivers up to 400mW × 2 into 32Ω and supports headphones up to 600Ω. The low noise floor and clean power delivery make it suitable for sensitive IEMs as well as efficient full-size headphones, providing clear dynamics and a quiet background.
Independent Dual USB-C Design
The D100 incorporates two separate USB-C ports—one dedicated to audio data and the other for auxiliary power. This physical separation helps minimize ground-loop noise and power interference from computers while also allowing external power when connecting to smartphones or tablets, reducing battery drain on mobile devices.
RCA Line Output with Preamp Function
In addition to headphone outputs, the D100 provides a high-quality RCA line output rated at 2Vrms. Volume control can be applied to the line output, enabling the unit to function as a digital preamplifier for active speakers or external power amplifiers in a compact desktop setup.
Premium CNC Aluminum Chassis and Display
Housed in a precision CNC-machined aluminum alloy chassis measuring 127 × 31.7 × 126.7 mm and weighing only 338g, the D100 offers excellent build quality and electromagnetic shielding in an ultra-compact footprint. A 1.66-inch fully laminated tempered glass display provides clear status information with a modern, clean aesthetic.
About SMSL
Foshan ShuangMuSanLin Electronics Co., Ltd. (SMSL) is an established manufacturer specializing in high-fidelity desktop audio. Focusing on digital-to-analog converters, balanced headphone amplifiers, and power amplifiers, SMSL has built a global reputation for combining rigorous measured performance, clean industrial design, and practical feature sets across a wide range of price points.
Technical Specifications
Input Modes: USB / Optical / Coaxial
Output Modes: RCA Line Out | 6.35mm Single-Ended | 4.4mm Balanced
Line Output Level: 2Vrms
Headphone Output Power: 350mW × 2 @ 16Ω | 400mW × 2 @ 32Ω | 105mW × 2 @ 150Ω | 50mW × 2 @ 300Ω | 26mW × 2 @ 600Ω
THD+N: RCA 0.00035% (-109dB) | HP SE 0.00055% (-105dB) | HP BAL 0.000621% (-104dB)
Dynamic Range: RCA 121dB | HP SE 116dB | HP BAL 116dB
Signal-to-Noise Ratio: RCA 129dB | HP SE 116dB | HP BAL 117dB
USB Transmission: USB 2.0 Asynchronous
USB Compatibility: Windows 7/8/8.1/10/11 (driver required), macOS, Linux, Android
MQA Decoding: USB / Optical / Coaxial
Sampling Rate (USB): PCM 44.1–768kHz (16–32bit), Native DSD 2.8224–22.5792MHz, DoP up to 11.2896MHz
Sampling Rate (Optical/Coaxial): PCM 44.1–192kHz (16–24bit), DoP 2.8224MHz
Power Consumption: < 5W
Dimensions: 127 × 31.7 × 126.7 mm (W × H × D)
Weight: 338g
Q&A
What DAC chip does the SMSL D100 use?
It uses the ESS ES9081 DAC chip with 8-channel parallel summing architecture.
What is the maximum sampling rate supported via USB?
PCM up to 32-bit/768kHz and native DSD up to DSD512.
Does the D100 support full MQA decoding?
Yes, full MQA decoding is supported on USB, optical, and coaxial inputs.
What headphone outputs does the D100 have?
It features a 4.4mm balanced output and a 6.35mm single-ended output, with up to 400mW × 2 into 32Ω.
Can the D100 be used as a preamplifier?
Yes, the RCA line output supports volume control and can be used to drive active speakers or external power amplifiers.
