Short answer: the Fosi Audio SK02. Both are rated 4.2/5 (#24 and #22 of 43 DAC and headphone amp combos), and the Fosi Audio SK02 costs $99.99 against $159 for the Khadas Tone2 Pro, so with nothing between them on measured performance, price settles it.
The case for the Fosi Audio SK02: It is rated for 755 mW into 32 ohms from its 4.4 mm balanced output, enough for most planar magnetic headphones. The catch: Its 105 dB SINAD trails rivals like the Fosi Audio K7 at 116 dB, though the difference is unlikely to matter for most listening.
The case for the Khadas Tone2 Pro: Audio Science Review measured a SINAD of 118 dB, so its noise and distortion are inaudible. The tradeoff: Khadas rates it at 211 mW into 32 ohms on the balanced output, enough for most headphones but short of what many planar magnetic models want.
Buy the Fosi Audio SK02. Both are rated the same, and it costs $59.01 less than the Khadas Tone2 Pro.
Still deciding? The full Headphone Amps and DACs rankings cover every ranked option.
Specifications Side By Side
| Fosi Audio SK02 | Khadas Tone2 Pro | |
|---|---|---|
| Price | $99.99 | $159.00 |
| Ranked | #24 of 43 in DAC and Headphone Amp Combos | #22 of 43 in DAC and Headphone Amp Combos |
| Device Type | DAC and headphone amp | DAC and headphone amp |
| SINAD | 105 dB (measured by Audio Science Review) | 118 dB (measured by Audio Science Review) |
| Output Power (32 ohms) | 755 mW (manufacturer rated, balanced) | 211 mW (manufacturer rated, balanced) |
| Headphone Outputs | 3.5 mm, 4.4 mm balanced | 3.5 mm, 4.4 mm balanced |
| Balanced Output | Yes (4.4 mm) | Yes (4.4 mm) |
| Inputs | USB, optical | USB-C, coaxial, Bluetooth (with optional BT Magic dongle) |
| Outputs | 3.5 mm line out, optical | RCA, balanced RCA |
| DAC Chip | ES9038Q2M | ES9038Q2M |
| Volume Control | Hardware knob | Hardware knob |
| Dimensions | 4.8” x 2” x 1.7” (121 x 51 x 43 mm) | - |
| Weight | 0.8 lbs (380 g) | - |
| Output Power (300 ohms) | - | 83 mW (manufacturer rated, balanced) |
Related Amp and DAC Comparisons
How Khadas Tone2 Pro compares with other leading options:
- SMSL DS20 vs Khadas Tone2 Pro
- Tanchjim Luna vs Khadas Tone2 Pro
- Khadas Tone2 Pro vs SMSL D12
- Khadas Tone2 Pro vs Fosi Audio K7
- Khadas Tone2 Pro vs Loxjie D40
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 SK02: $99.99 Amazon eBay
Pros: It is rated for 755 mW into 32 ohms from its 4.4 mm balanced output, enough for most planar magnetic headphones. Audio Science Review measured a SINAD of 105 dB, clean for nearly all listening, and it rates higher than the pricier Fosi Audio K7. It also has USB and optical inputs plus line and optical outputs.
Cons: Its 105 dB SINAD trails rivals like the Fosi Audio K7 at 116 dB, though the difference is unlikely to matter for most listening. There is no Bluetooth or coaxial input and no RCA output for powered speakers, only a 3.5 mm line out.
Full Fosi Audio SK02 review and specifications →
| Released | Feb 2024 (2 years ago) |
|---|---|
| Balanced Output | Yes (4.4 mm) |
| DAC Chip | ES9038Q2M |
| Device Type | DAC and headphone amp |
| Dimensions | 4.8” x 2” x 1.7” (121 x 51 x 43 mm) |
| Headphone Outputs | 3.5 mm, 4.4 mm balanced |
| Inputs | USB, optical |
| Output Power (32 ohms) | 755 mW (manufacturer rated, balanced) |
| Outputs | 3.5 mm line out, optical |
| SINAD | 105 dB (measured by Audio Science Review) |
| Volume Control | Hardware knob |
| Weight | 0.8 lbs (380 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Khadas Tone2 Pro: $159.00 Amazon eBay
Pros: Audio Science Review measured a SINAD of 118 dB, so its noise and distortion are inaudible. It offers 3.5 mm and 4.4 mm balanced headphone outputs, RCA and balanced RCA line outputs, USB-C and coaxial inputs, and optional Bluetooth through an add-on dongle, and it rates higher than the Woo Audio WA11 Topaz for far less.
Cons: Khadas rates it at 211 mW into 32 ohms on the balanced output, enough for most headphones but short of what many planar magnetic models want. The Fosi Audio SK02 matches its rating with much more balanced power for less, and Bluetooth requires buying the separate dongle.
Full Khadas Tone2 Pro review and specifications →
| Balanced Output | Yes (4.4 mm) |
|---|---|
| DAC Chip | ES9038Q2M |
| Device Type | DAC and headphone amp |
| Headphone Outputs | 3.5 mm, 4.4 mm balanced |
| Inputs | USB-C, coaxial, Bluetooth (with optional BT Magic dongle) |
| Output Power (300 ohms) | 83 mW (manufacturer rated, balanced) |
| Output Power (32 ohms) | 211 mW (manufacturer rated, balanced) |
| Outputs | RCA, balanced RCA |
| SINAD | 118 dB (measured by Audio Science Review) |
| Volume Control | Hardware knob |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons