Short answer: the SMSL D-6S. Both are rated 4.8/5 (#9 and #12 of 30 DACs), and the SMSL D-6S costs $199.99 against $398.65 for the SMSL DO200 MKII, with the ratings tied, the lower price decides it.
What the SMSL D-6S does well: Audio Science Review measured 122 dB SINAD, so its noise and distortion are transparent. Watch for: There is no volume control listed, so it relies on the amp or speakers downstream to set level.
What the SMSL DO200 MKII does well: Audio Science Review measured a SINAD of 121 dB, so its noise and distortion are inaudible. The catch: The SMSL D-6S matches its rating for about half the price, so the extra money mostly buys more inputs.
Buy the SMSL D-6S. Both are rated the same, and it costs $198.66 less than the SMSL DO200 MKII.
Looking for alternatives? See the complete Headphone Amps and DACs rankings.
Specifications Side By Side
| SMSL D-6S | SMSL DO200 MKII | |
|---|---|---|
| Price | $199.99 | $398.65 |
| Ranked | #9 of 30 in DACs | #12 of 30 in DACs |
| Device Type | DAC | DAC |
| SINAD | 122 dB (measured by Audio Science Review) | 121 dB (measured by Audio Science Review) |
| Balanced Output | Yes (XLR line out) | Yes (XLR line out) |
| Inputs | USB, optical, coaxial, Bluetooth | USB, optical, coaxial, AES/EBU, I2S, Bluetooth |
| Outputs | RCA, XLR | RCA, XLR |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD, LDAC | SBC, AAC, aptX, aptX HD, LDAC |
| DAC Chip | ES9039Q2M | 2 x ES9068AS |
| Dimensions | 5.9” x 1.7” x 5.1” (150 x 42 x 128.5 mm) | 8.3” x 1.7” x 7.3” (210 x 43 x 185 mm) |
| Weight | 1.6 lbs (710 g) | 2.6 lbs (1,200 g) |
Related Amp and DAC Comparisons
More top alternatives to SMSL D-6S:
- Topping D50 III vs SMSL D-6S
- Fosi Audio ZD3 vs SMSL D-6S
- SMSL D-6S vs SMSL D200
- SMSL D-6S vs SMSL SU-6
- SMSL D-6S vs Soncoz LA-QXD1
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 D-6S: $199.99 Amazon eBay
Pros: Audio Science Review measured 122 dB SINAD, so its noise and distortion are transparent. It offers USB, optical, coaxial and LDAC Bluetooth inputs with RCA and XLR outputs for an amp or powered speakers. It matches the rating of the Topping D70 Pro SABRE for far less.
Cons: There is no volume control listed, so it relies on the amp or speakers downstream to set level. DACs such as the Topping D70 Pro SABRE measure a touch cleaner at 123 dB, though they cost far more and the difference is not audible.
Full SMSL D-6S review and specifications →
| Released | Sep 2023 (3 years ago) |
|---|---|
| Balanced Output | Yes (XLR line out) |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD, LDAC |
| DAC Chip | ES9039Q2M |
| Device Type | DAC |
| Dimensions | 5.9” x 1.7” x 5.1” (150 x 42 x 128.5 mm) |
| Inputs | USB, optical, coaxial, Bluetooth |
| Outputs | RCA, XLR |
| SINAD | 122 dB (measured by Audio Science Review) |
| Weight | 1.6 lbs (710 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
SMSL DO200 MKII: $398.65 Amazon eBay
Pros: Audio Science Review measured a SINAD of 121 dB, so its noise and distortion are inaudible. It accepts USB, optical, coaxial, AES/EBU, I2S and Bluetooth with LDAC, aptX HD and AAC, and feeds an amp or powered speakers over RCA or balanced XLR. It matches the rating of the Gustard X18 for much less.
Cons: The SMSL D-6S matches its rating for about half the price, so the extra money mostly buys more inputs. It has no headphone output, and at 1.2 kg in a wide chassis it needs real shelf space.
Full SMSL DO200 MKII review and specifications →
| Released | Oct 2022 (4 years ago) |
|---|---|
| Balanced Output | Yes (XLR line out) |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD, LDAC |
| DAC Chip | 2 x ES9068AS |
| Device Type | DAC |
| Dimensions | 8.3” x 1.7” x 7.3” (210 x 43 x 185 mm) |
| Inputs | USB, optical, coaxial, AES/EBU, I2S, Bluetooth |
| Outputs | RCA, XLR |
| SINAD | 121 dB (measured by Audio Science Review) |
| Weight | 2.6 lbs (1,200 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons