Short answer: the Fosi Audio K7. It ranks #26 of 43 DAC and headphone amp combos by measured performance, rated 4.1/5, at $199.99; the xDuoo DM-01 ranks #41, rated 2.4/5, and costs $279, so there is little reason to consider the other one.
The Fosi Audio K7 is the better-sounding option. Audio Science Review measured a SINAD of 116 dB, so its noise and distortion are inaudible. The catch: Fosi Audio doesn’t publish a 32 ohm power figure, so its headroom for hard to drive headphones is unclear.
What the xDuoo DM-01 does well: It supports a long list of Bluetooth codecs, including LDAC, aptX Adaptive and LC3, alongside USB-C. It supports LDAC Bluetooth, which the Fosi Audio K7 lacks. The tradeoff: Audio Science Review measured just 38 dB SINAD, a severe and audible level of noise and distortion.
Buy the Fosi Audio K7. It is rated higher than the xDuoo DM-01 and costs less, which makes it the one to get unless you need something the other one does better.
Want more options? Browse the full Headphone Amps and DACs rankings.
Specifications Side By Side
| Fosi Audio K7 | xDuoo DM-01 | |
|---|---|---|
| Price | $199.99 | $279.00 |
| Ranked | #26 of 43 in DAC and Headphone Amp Combos | #41 of 43 in DAC and Headphone Amp Combos |
| Device Type | DAC and headphone amp | DAC and headphone amp |
| SINAD | 116 dB (measured by Audio Science Review) | 38 dB (measured by Audio Science Review) |
| Headphone Outputs | 3.5 mm, 4.4 mm balanced | 6.35 mm |
| Balanced Output | Yes (4.4 mm) | No |
| Inputs | USB-C, optical, coaxial, Bluetooth, 3.5 mm mic | USB-C, Bluetooth |
| Outputs | RCA | AUX line out |
| Bluetooth Codecs | SBC, aptX HD, aptX LL | SBC, AAC, aptX, aptX HD, aptX Adaptive, LDAC, LC3 |
| DAC Chip | AK4493SEQ | CS43131 |
| Volume Control | Hardware knob | - |
| Equalizer | Yes (bass and treble knobs) | - |
| Output Power (32 ohms) | - | 1,500 mW (manufacturer rated) |
| Dimensions | - | 6.9” x 3.4” x 2.4” (175 x 86 x 60 mm) |
| Weight | - | 1.6 lbs (730 g) |
Related Amp and DAC Comparisons
How Fosi Audio K7 compares with other leading options:
- Fosi Audio ZH3 vs Fosi Audio K7
- SMSL DS20 vs Fosi Audio K7
- Schiit Magni Unity with Mesh DAC vs Fosi Audio K7
- Khadas Tone2 Pro vs Fosi Audio K7
- SMSL D12 vs Fosi Audio K7
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 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
xDuoo DM-01: $279.00 Amazon eBay
Pros: It supports a long list of Bluetooth codecs, including LDAC, aptX Adaptive and LC3, alongside USB-C. A rated 1.5 W into 32 ohms is enough power on paper for most planar magnetic headphones.
Cons: Audio Science Review measured just 38 dB SINAD, a severe and audible level of noise and distortion. There is only a single unbalanced 6.35 mm output, and the Loxjie D30 rates far higher and measures transparent for much less.
Full xDuoo DM-01 review and specifications →
| Released | Mar 2025 (1 year ago) |
|---|---|
| Balanced Output | No |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD, aptX Adaptive, LDAC, LC3 |
| DAC Chip | CS43131 |
| Device Type | DAC and headphone amp |
| Dimensions | 6.9” x 3.4” x 2.4” (175 x 86 x 60 mm) |
| Headphone Outputs | 6.35 mm |
| Inputs | USB-C, Bluetooth |
| Output Power (32 ohms) | 1,500 mW (manufacturer rated) |
| Outputs | AUX line out |
| SINAD | 38 dB (measured by Audio Science Review) |
| Weight | 1.6 lbs (730 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons