Short answer: a tie on measured performance. Both are rated 4.8/5 (#11 and #14 of 30 DACs) at nearly the same price ($399 vs $399.99), so choose on features and fit.
The case for the SMSL DO200 Pro: Audio Science Review measured 122 dB SINAD, so its noise and distortion are inaudible. Watch for: It is a DAC only, so you need a separate headphone amp or powered speakers.
The case for the SMSL SU-9n: Audio Science Review measured 121 dB SINAD, so its noise and distortion are inaudible. The tradeoff: It is a DAC only, so headphones need a separate amp.
Buy the SMSL DO200 Pro or the SMSL SU-9n on features: they are rated the same at close to the same price.
Want more options? Browse the full Headphone Amps and DACs rankings.
Specifications Side By Side
| SMSL DO200 Pro | SMSL SU-9n | |
|---|---|---|
| Price | $399.00 | $399.99 |
| Ranked | #11 of 30 in DACs | #14 of 30 in DACs |
| Device Type | DAC | DAC |
| SINAD | 122 dB (measured by Audio Science Review) | 121 dB (measured by Audio Science Review) |
| Inputs | USB-C, HDMI ARC, optical, coaxial, Bluetooth | USB, optical, coaxial, Bluetooth |
| Outputs | RCA, XLR | RCA, XLR |
| Balanced Output | Yes (XLR line out) | Yes (XLR line out) |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD, LDAC | SBC, AAC, aptX HD, LDAC |
| DAC Chip | 12 x CS43131 | ES9038PRO |
| Volume Control | Digital (remote, variable/fixed modes) | Digital (remote, pre/fixed modes) |
| Dimensions | 7.4” x 1.8” x 7.3” (189 x 45 x 186 mm) | 7.4” x 1.6” x 6.1” (187.5 x 40 x 154 mm) |
| Weight | 2.5 lbs (1,150 g) | 1.7 lbs (790 g) |
Related Amp and DAC Comparisons
How SMSL DO200 Pro compares with other leading options:
- SMSL DO200 Pro vs SMSL RAW Pro-DAC1
- SMSL DO200 Pro vs SMSL VMV D1se2
- SMSL DO200 Pro vs Topping D70 Pro SABRE
- SMSL DO200 MKII vs SMSL DO200 Pro
- SMSL D200 vs SMSL DO200 Pro
Prices on this page were last checked October 11, 2026 at 4:59 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Amps and DACs In Full
SMSL DO200 Pro: $399.00 HiFiGo eBay
Pros: Audio Science Review measured 122 dB SINAD, so its noise and distortion are inaudible. Inputs include USB-C, HDMI ARC, optical, coaxial and Bluetooth with LDAC, aptX HD, aptX, AAC and SBC, which makes it easy to connect to a TV as well as a computer. It feeds amps or powered speakers through RCA or balanced XLR, with remote volume in variable mode, and costs less than the SMSL VMV D1se2 at the same rating.
Cons: It is a DAC only, so you need a separate headphone amp or powered speakers. The SMSL D-6S earns the same rating for even less if you do not need HDMI ARC. There is no I2S or AES input.
Full SMSL DO200 Pro review and specifications →
| Balanced Output | Yes (XLR line out) |
|---|---|
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD, LDAC |
| DAC Chip | 12 x CS43131 |
| Device Type | DAC |
| Dimensions | 7.4” x 1.8” x 7.3” (189 x 45 x 186 mm) |
| Inputs | USB-C, HDMI ARC, optical, coaxial, Bluetooth |
| Outputs | RCA, XLR |
| SINAD | 122 dB (measured by Audio Science Review) |
| Volume Control | Digital (remote, variable/fixed modes) |
| Weight | 2.5 lbs (1,150 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
SMSL SU-9n: $399.99 HiFiGo eBay
Pros: Audio Science Review measured 121 dB SINAD, so its noise and distortion are inaudible. It takes USB, optical, coaxial and Bluetooth with LDAC, aptX HD and AAC, and feeds an amp or powered speakers through RCA or balanced XLR, with a remote and switchable preamp or fixed output.
Cons: It is a DAC only, so headphones need a separate amp. The Topping D70 Pro SABRE rates the same with slightly higher measured SINAD, though it costs more.
Full SMSL SU-9n review and specifications →
| Balanced Output | Yes (XLR line out) |
|---|---|
| Bluetooth Codecs | SBC, AAC, aptX HD, LDAC |
| DAC Chip | ES9038PRO |
| Device Type | DAC |
| Dimensions | 7.4” x 1.6” x 6.1” (187.5 x 40 x 154 mm) |
| Inputs | USB, optical, coaxial, Bluetooth |
| Outputs | RCA, XLR |
| SINAD | 121 dB (measured by Audio Science Review) |
| Volume Control | Digital (remote, pre/fixed modes) |
| Weight | 1.7 lbs (790 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons