SMSL
SMSL SU-9 Pro
Last updated August 1, 2026
We may earn an affiliate commission from links on this page — this never affects our picks. Read our full affiliate disclosure.
A desktop DAC built around the flagship ES9039MPRO chip, with Bluetooth 5.0 LDAC and both RCA and XLR outputs.
Official product pageOverview
The SU-9 Pro is a desktop DAC using ES9039MPRO D/A chips across 8 channels with 11 OPA1612A op-amps, a 3rd-generation XMOS XU316 USB interface, and a self-developed CK-03 jitter processing circuit. It supports PCM up to 768kHz, DSD up to DSD512, and MQA decoding, plus built-in Bluetooth 5.0 with LDAC and aptX/HD for wireless sources, all housed in a CNC-milled aluminum shell with a tempered glass display.
Pros
- ES9039MPRO flagship DAC chip with a 3rd-gen XMOS XU316 USB interface
- Supports PCM up to 768kHz and DSD512, plus MQA decoding
- Built-in Bluetooth 5.0 with LDAC/aptX HD for wireless high-res streaming
- Both RCA and XLR balanced outputs (up to 134dB SNR on XLR)
Cons
- A DAC only — pair with a separate headphone amp, since no headphone output is listed in its specifications
- 7 working-day pre-order fulfillment window, non-cancellable and non-refundable
Specifications
- DAC Chip
- ES9039MPRO (8 channels, 11x OPA1612A op-amps)
- USB Interface
- 3rd-gen XMOS XU316
- Inputs
- USB, Optical, Coaxial, Bluetooth
- Outputs
- RCA, XLR
- Line Output (XLR)
- 5.2Vrms
- Line Output (RCA)
- 2.5Vrms
- THD+N
- 0.0005% (-125dB, unweighted)
- SNR
- 134dB (XLR), 128dB (RCA)
- USB Sampling
- 44.1-768kHz PCM; DSD 2.8224-22.5792MHz
- Dimensions
- 187.5 × 154 × 40mm
- Weight
- 0.79kg
FAQs
Does the SU-9 Pro have a headphone amp built in?
No — based on its listed specifications this is a DAC with RCA/XLR line outputs, not a DAC/amp combo, so it needs a separate headphone amplifier.
Does it support wireless sources?
Yes — it has built-in Bluetooth 5.0 with LDAC and aptX/aptX HD codec support.
What formats does it decode?
PCM up to 768kHz, DSD up to DSD512, and MQA, over USB.
You might also like
AZLA SednaEarfit Max
Replacement silicone eartips with a hexagonal filter pattern, sized using data from 788 ear-canal measurements.
E1DA 9038D6K
A pocket-sized USB DAC/amp built around the ES9038Q2M chip, with every unit individually calibrated.
DDHiFi DJ65A AL
A 6.35mm-to-3.5mm audio adapter with a surgical-grade stainless steel housing and a 24K gold-plated plug.
Shanling M3 Ultra
A mid-range Android digital audio player with dual ES9219C DAC chips and up to 20.5 hours of battery life.