Short answer: the Fosi Audio ZH3. It ranks #12 of 43 DAC and headphone amp combos by measured performance, rated 4.7/5, at $199.99; the Fosi Audio K7 ranks #26, rated 4.1/5, at $199.99. With prices this close, go by the sound-quality ranking rather than the cost.
The Fosi Audio ZH3 is the better-sounding option. Audio Science Review measured a SINAD of 113 dB, clean for nearly all listening. The tradeoff: The Topping DX1 II rates higher and measures cleaner at 121 dB for less money, though with less rated power.
Why pick the Fosi Audio K7: Audio Science Review measured a SINAD of 116 dB, so its noise and distortion are inaudible. Watch for: Fosi Audio doesn’t publish a 32 ohm power figure, so its headroom for hard to drive headphones is unclear.
Buy the Fosi Audio ZH3. It is rated higher than the Fosi Audio K7 at the same price, so it is the default pick unless a specific strength of the other one matters more to you.
Looking for alternatives? See the complete Headphone Amps and DACs rankings.
Specifications Side By Side
| Fosi Audio ZH3 | Fosi Audio K7 | |
|---|---|---|
| Price | $199.99 | $199.99 |
| Ranked | #12 of 43 in DAC and Headphone Amp Combos | #26 of 43 in DAC and Headphone Amp Combos |
| Device Type | DAC and headphone amp | DAC and headphone amp |
| SINAD | 113 dB (measured by Audio Science Review) | 116 dB (measured by Audio Science Review) |
| Output Power (32 ohms) | 2,570 mW (manufacturer rated, balanced) | - |
| Headphone Outputs | 6.35 mm, 4.4 mm balanced | 3.5 mm, 4.4 mm balanced |
| Balanced Output | Yes (4.4 mm, XLR line out) | Yes (4.4 mm) |
| Inputs | USB, optical, coaxial, RCA | USB-C, optical, coaxial, Bluetooth, 3.5 mm mic |
| Outputs | RCA, XLR | RCA |
| DAC Chip | AK4493SEQ | AK4493SEQ |
| Equalizer | Yes (bass and treble) | Yes (bass and treble knobs) |
| Bluetooth Codecs | - | SBC, aptX HD, aptX LL |
| Volume Control | - | Hardware knob |
Related Amp and DAC Comparisons
More top alternatives to Fosi Audio ZH3:
- SMSL RAW-MDA1 vs Fosi Audio ZH3
- Topping DX1 II vs Fosi Audio ZH3
- SMSL DL100 vs Fosi Audio ZH3
- Topping DX3 Pro+ vs Fosi Audio ZH3
- Fosi Audio ZH3 vs SMSL DS20
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
Fosi Audio ZH3: $199.99 Amazon eBay
Pros: Audio Science Review measured a SINAD of 113 dB, clean for nearly all listening. A rated 2,570 mW into 32 ohms from the balanced output handles most planar magnetic headphones, with 6.35 mm and 4.4 mm balanced jacks. USB, optical, coaxial and RCA inputs plus RCA and XLR outputs let it double as a preamp, and bass and treble controls are built in.
Cons: The Topping DX1 II rates higher and measures cleaner at 121 dB for less money, though with less rated power. It has no Bluetooth input, and its SINAD trails most of the top-rated units in this group.
Full Fosi Audio ZH3 review and specifications →
| Released | Sep 2025 (1 year ago) |
|---|---|
| Balanced Output | Yes (4.4 mm, XLR line out) |
| DAC Chip | AK4493SEQ |
| Device Type | DAC and headphone amp |
| Equalizer | Yes (bass and treble) |
| Headphone Outputs | 6.35 mm, 4.4 mm balanced |
| Inputs | USB, optical, coaxial, RCA |
| Output Power (32 ohms) | 2,570 mW (manufacturer rated, balanced) |
| Outputs | RCA, XLR |
| SINAD | 113 dB (measured by Audio Science Review) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Fosi Audio K7: $199.99 Amazon eBay
Pros: Audio Science Review measured a SINAD of 116 dB, so its noise and distortion are inaudible. It is unusually flexible for the money, with USB, optical, coaxial and Bluetooth inputs (SBC, aptX HD, aptX LL), RCA line out, a 4.4 mm balanced headphone jack, a microphone input and bass and treble knobs.
Cons: Fosi Audio doesn’t publish a 32 ohm power figure, so its headroom for hard to drive headphones is unclear. The SMSL DS20 rates higher for a little less, and the Fosi Audio SK02 rates slightly higher for much less. Its Bluetooth lacks AAC and LDAC.
Full Fosi Audio K7 review and specifications →
| Released | Apr 2025 (1 year ago) |
|---|---|
| Balanced Output | Yes (4.4 mm) |
| Bluetooth Codecs | SBC, aptX HD, aptX LL |
| DAC Chip | AK4493SEQ |
| Device Type | DAC and headphone amp |
| Equalizer | Yes (bass and treble knobs) |
| Headphone Outputs | 3.5 mm, 4.4 mm balanced |
| Inputs | USB-C, optical, coaxial, Bluetooth, 3.5 mm mic |
| Outputs | RCA |
| SINAD | 116 dB (measured by Audio Science Review) |
| Volume Control | Hardware knob |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons