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 Neutron HiFi DAC V1 ranks #33, rated 3.7/5, at $177, $22.99 cheaper, which does not close the gap in measured performance.
The Fosi Audio K7 is the better-sounding choice. 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.
Why pick the Neutron HiFi DAC V1: Audio Science Review measured a SINAD of 111 dB, clean for nearly all listening, and at 0 lbs (13 g) it is a tiny USB-C dongle. The tradeoff: Neutron doesn’t publish a power figure into 32 ohms, and it has only a 3.5 mm output with no balanced option.
Buy the Fosi Audio K7. It is rated higher, and saving $22.99 with the Neutron HiFi DAC V1 does not make up for the sound-quality gap.
Looking for alternatives? See the complete Headphone Amps and DACs rankings.
Specifications Side By Side
| Fosi Audio K7 | Neutron HiFi DAC V1 | |
|---|---|---|
| Price | $199.99 | $177 |
| Ranked | #26 of 43 in DAC and Headphone Amp Combos | #33 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) | 111 dB (measured by Audio Science Review) |
| Headphone Outputs | 3.5 mm, 4.4 mm balanced | 3.5 mm |
| Balanced Output | Yes (4.4 mm) | No |
| Inputs | USB-C, optical, coaxial, Bluetooth, 3.5 mm mic | USB-C |
| Outputs | RCA | - |
| Bluetooth Codecs | SBC, aptX HD, aptX LL | - |
| DAC Chip | AK4493SEQ | ES9219Q |
| Volume Control | Hardware knob | - |
| Equalizer | Yes (bass and treble knobs) | Yes (10 to 40-band parametric) |
| Dimensions | - | 2” x 0.8” x 0.4” (50 x 19.9 x 9.6 mm) |
| Weight | - | 0 lbs (13 g) |
Related Amp and DAC Comparisons
More worthwhile head-to-heads for Fosi Audio K7:
- 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
Neutron HiFi DAC V1: $177 Neutron HiFi eBay
Pros: Audio Science Review measured a SINAD of 111 dB, clean for nearly all listening, and at 13 g it is a tiny USB-C dongle. Its built-in parametric equalizer with 10 to 40 bands lets you correct a headphone’s frequency response without software on your phone or computer.
Cons: Neutron doesn’t publish a power figure into 32 ohms, and it has only a 3.5 mm output with no balanced option. The Loxjie D30 rates higher and measured cleaner for less.
Full Neutron HiFi DAC V1 review and specifications →
| Balanced Output | No |
|---|---|
| DAC Chip | ES9219Q |
| Device Type | DAC and headphone amp |
| Dimensions | 2” x 0.8” x 0.4” (50 x 19.9 x 9.6 mm) |
| Equalizer | Yes (10 to 40-band parametric) |
| Headphone Outputs | 3.5 mm |
| Inputs | USB-C |
| SINAD | 111 dB (measured by Audio Science Review) |
| Weight | 0 lbs (13 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons