Short answer: the Topping D50 III. It ranks #1 of 30 DACs by measured performance, rated 4.9/5, at $229. The SMSL D-6S ranks #9, rated 4.8/5, at $199.99, $29.01 cheaper, a saving that is not big enough to make up the sound-quality gap.
Why pick the Topping D50 III: Audio Science Review measured 123 dB SINAD, so its noise and distortion are transparent. Watch for: Balanced output uses 6.35 mm TRS jacks rather than XLR, so XLR gear needs adapter cables.
What the SMSL D-6S does well: Audio Science Review measured 122 dB SINAD, so its noise and distortion are transparent. It supports aptX HD Bluetooth, which the Topping D50 III lacks. The tradeoff: There is no volume control listed, so it relies on the amp or speakers downstream to set level.
Buy the Topping D50 III. It is rated higher, and the $29.01 saving on the SMSL D-6S is not enough to make up the difference.
Want more options? Browse the full Headphone Amps and DACs rankings.
Specifications Side By Side
| Topping D50 III | SMSL D-6S | |
|---|---|---|
| Price | $229.00 | $199.99 |
| Ranked | #1 of 30 in DACs | #9 of 30 in DACs |
| Device Type | DAC | DAC |
| SINAD | 123 dB (measured by Audio Science Review) | 122 dB (measured by Audio Science Review) |
| Balanced Output | Yes (TRS line out) | Yes (XLR line out) |
| Inputs | USB-C, optical, coaxial, Bluetooth | USB, optical, coaxial, Bluetooth |
| Outputs | RCA, 6.35 mm TRS balanced | RCA, XLR |
| Bluetooth Codecs | SBC, LDAC | SBC, AAC, aptX, aptX HD, LDAC |
| DAC Chip | 2 x ES9039Q2M | ES9039Q2M |
| Volume Control | Digital (joystick, remote) | - |
| Equalizer | Yes (10-band parametric) | - |
| Dimensions | 4.9” x 1” x 5.2” (125 x 26 x 131 mm) | 5.9” x 1.7” x 5.1” (150 x 42 x 128.5 mm) |
| Weight | - | 1.6 lbs (710 g) |
Related Amp and DAC Comparisons
How Topping D50 III compares with other leading options:
- Topping D50 III vs SMSL DO200 MKII
- Topping D50 III vs Fosi Audio ZD3
- Topping D50 III vs SMSL D200
- Topping D50 III vs SMSL SU-6
- Topping D50 III 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
Topping D50 III: $229.00 Amazon eBay
Pros: Audio Science Review measured 123 dB SINAD, so its noise and distortion are transparent. It packs USB-C, optical, coaxial and LDAC Bluetooth inputs, a remote controlled volume, 10 band parametric EQ and balanced TRS outputs into a compact chassis for an amp or powered speakers. It matches the rating of the Topping D900 for a small fraction of the price.
Cons: Balanced output uses 6.35 mm TRS jacks rather than XLR, so XLR gear needs adapter cables. Bluetooth lacks aptX and AAC, offering only SBC and LDAC.
Full Topping D50 III review and specifications →
| Released | Mar 2024 (2 years ago) |
|---|---|
| Balanced Output | Yes (TRS line out) |
| Bluetooth Codecs | SBC, LDAC |
| DAC Chip | 2 x ES9039Q2M |
| Device Type | DAC |
| Dimensions | 4.9” x 1” x 5.2” (125 x 26 x 131 mm) |
| Equalizer | Yes (10-band parametric) |
| Inputs | USB-C, optical, coaxial, Bluetooth |
| Outputs | RCA, 6.35 mm TRS balanced |
| SINAD | 123 dB (measured by Audio Science Review) |
| Volume Control | Digital (joystick, remote) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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