Short answer: the Topping D50 III. It ranks #1 of 30 DACs by measured performance, rated 4.9/5, at $229. The Fosi Audio ZD3 ranks #15, rated 4.8/5, at $179.99, $49.01 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. It supports LDAC Bluetooth, which the Fosi Audio ZD3 lacks. The catch: Bluetooth lacks aptX and AAC, offering only SBC and LDAC.
Why pick the Fosi Audio ZD3: Audio Science Review measured 117 dB SINAD, so its noise and distortion are transparent. The catch: Its SINAD is a few dB behind similarly rated DACs like the SMSL D-6S, though both are transparent.
Buy the Topping D50 III. It is rated higher, and saving $49.01 with the Fosi Audio ZD3 does not make up for the sound-quality gap.
Want more options? Browse the full Headphone Amps and DACs rankings.
Specifications Side By Side
| Topping D50 III | Fosi Audio ZD3 | |
|---|---|---|
| Price | $229.00 | $179.99 |
| Ranked | #1 of 30 in DACs | #15 of 30 in DACs |
| Device Type | DAC | DAC |
| SINAD | 123 dB (measured by Audio Science Review) | 117 dB (measured by Audio Science Review) |
| Balanced Output | Yes (TRS line out) | Yes (XLR line out) |
| Inputs | USB-C, optical, coaxial, Bluetooth | USB, HDMI ARC, optical, coaxial, Bluetooth |
| Outputs | RCA, 6.35 mm TRS balanced | RCA, XLR |
| Bluetooth Codecs | SBC, LDAC | SBC, AAC, aptX, aptX HD |
| DAC Chip | 2 x ES9039Q2M | ES9039Q2M |
| Volume Control | Digital (joystick, remote) | Digital preamp (remote) |
| Equalizer | Yes (10-band parametric) | - |
| Dimensions | 4.9” x 1” x 5.2” (125 x 26 x 131 mm) | - |
Related Amp and DAC Comparisons
How Topping D50 III compares with other leading options:
- Topping D50 III vs SMSL D-6S
- Topping D50 III vs SMSL DO200 MKII
- 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
Fosi Audio ZD3: $179.99 Amazon eBay
Pros: Audio Science Review measured 117 dB SINAD, so its noise and distortion are transparent. It has unusually broad connectivity, with USB, HDMI ARC from a TV, optical, coaxial and aptX HD Bluetooth inputs, plus RCA and XLR outputs and a remote controlled digital preamp for driving powered speakers directly. It matches the rating of the SMSL D-6S for a bit less.
Cons: Its SINAD is a few dB behind similarly rated DACs like the SMSL D-6S, though both are transparent. Bluetooth lacks LDAC, which the SMSL D-6S includes.
Full Fosi Audio ZD3 review and specifications →
| Released | Sep 2024 (2 years ago) |
|---|---|
| Balanced Output | Yes (XLR line out) |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD |
| DAC Chip | ES9039Q2M |
| Device Type | DAC |
| Inputs | USB, HDMI ARC, optical, coaxial, Bluetooth |
| Outputs | RCA, XLR |
| SINAD | 117 dB (measured by Audio Science Review) |
| Volume Control | Digital preamp (remote) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons