Short answer: the Chord Mojo 2. It ranks #21 of 43 DAC and headphone amp combos by measured performance, rated 4.3/5, at $566.86; the Gustard A20H ranks #25, rated 4.2/5, and costs $752, so there is little reason to consider the other one.
The case for the Chord Mojo 2: Audio Science Review measured a SINAD of 110 dB, which is clean for nearly all listening. The tradeoff: It costs far more than the TRN Black Pearl, which rates higher and measured cleaner at 117 dB.
What the Gustard A20H does well: A rated 2.4 W balanced into 32 ohms and 264 mW into 300 ohms is enough for planar magnetic and high impedance headphones alike. The tradeoff: Its 103 dB SINAD trails many cheaper rivals, and the Tanchjim Luna rates higher with cleaner measurements for a small fraction of the price.
Buy the Chord Mojo 2. It is rated higher than the Gustard A20H and costs less, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Headphone Amps and DACs rankings.
Specifications Side By Side
| Chord Mojo 2 | Gustard A20H | |
|---|---|---|
| Price | $566.86 | $752 |
| Ranked | #21 of 43 in DAC and Headphone Amp Combos | #25 of 43 in DAC and Headphone Amp Combos |
| Device Type | DAC and headphone amp | DAC and headphone amp |
| SINAD | 110 dB (measured by Audio Science Review) | 103 dB (measured by Audio Science Review) |
| Output Power (32 ohms) | 600 mW into 30 ohms (manufacturer rated) | 2,400 mW (manufacturer rated, balanced) |
| Output Power (300 ohms) | 90 mW (manufacturer rated) | 264 mW (manufacturer rated, balanced) |
| Headphone Outputs | 3.5 mm, 4.4 mm | - |
| Inputs | USB-C, Micro-USB, optical, coaxial | USB, I2S (HDMI), AES/EBU, coaxial, optical |
| Equalizer | Yes (UHD DSP tone control) | - |
| Dimensions | 3.3” x 2.4” x 0.9” (83 x 62 x 22.9 mm) | 13” x 2.6” x 10.2” (330 x 65 x 260 mm) |
| Weight | 0.4 lbs (185 g) | 13.2 lbs (6 kg) |
| Balanced Output | - | Yes (balanced headphone output, XLR line out) |
| Outputs | - | RCA, XLR |
| DAC Chip | - | 2 x AK4497EQ |
| Volume Control | - | Relay attenuator (60 steps) |
Related Amp and DAC Comparisons
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- SMSL DO400 vs Chord Mojo 2
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- Chord Mojo 2 vs Luxsin X9
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
Chord Mojo 2: $566.86 Amazon eBay
Pros: Audio Science Review measured a SINAD of 110 dB, which is clean for nearly all listening. A rated 600 mW into 30 ohms is enough for most planar magnetic headphones, unusual muscle for something this portable. It takes USB-C, Micro-USB, optical and coaxial inputs, offers both 3.5 mm and 4.4 mm outputs, and includes built-in DSP tone control.
Cons: It costs far more than the TRN Black Pearl, which rates higher and measured cleaner at 117 dB. The Fosi Audio DS3 also matches its rating for much less. At 185 g it is much bigger and heavier than a typical dongle, so it is less convenient to carry with a phone.
Full Chord Mojo 2 review and specifications →
| Released | 2022 (4 years ago) |
|---|---|
| Device Type | DAC and headphone amp |
| Dimensions | 3.3” x 2.4” x 0.9” (83 x 62 x 22.9 mm) |
| Equalizer | Yes (UHD DSP tone control) |
| Headphone Outputs | 3.5 mm, 4.4 mm |
| Inputs | USB-C, Micro-USB, optical, coaxial |
| Output Power (300 ohms) | 90 mW (manufacturer rated) |
| Output Power (32 ohms) | 600 mW into 30 ohms (manufacturer rated) |
| SINAD | 110 dB (measured by Audio Science Review) |
| Weight | 0.4 lbs (185 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Gustard A20H: $752 HiFiGo eBay
Pros: A rated 2.4 W balanced into 32 ohms and 264 mW into 300 ohms is enough for planar magnetic and high impedance headphones alike. Inputs include USB, I2S over HDMI, AES/EBU, coaxial and optical, with RCA and XLR line outputs and a 60 step relay volume control. Audio Science Review measured 103 dB SINAD, clean enough for nearly all listening.
Cons: Its 103 dB SINAD trails many cheaper rivals, and the Tanchjim Luna rates higher with cleaner measurements for a small fraction of the price. There is no Bluetooth input, and at 6 kg it is a very large and heavy unit for what it delivers.
Full Gustard A20H review and specifications →
| Balanced Output | Yes (balanced headphone output, XLR line out) |
|---|---|
| DAC Chip | 2 x AK4497EQ |
| Device Type | DAC and headphone amp |
| Dimensions | 13” x 2.6” x 10.2” (330 x 65 x 260 mm) |
| Inputs | USB, I2S (HDMI), AES/EBU, coaxial, optical |
| Output Power (300 ohms) | 264 mW (manufacturer rated, balanced) |
| Output Power (32 ohms) | 2,400 mW (manufacturer rated, balanced) |
| Outputs | RCA, XLR |
| SINAD | 103 dB (measured by Audio Science Review) |
| Volume Control | Relay attenuator (60 steps) |
| Weight | 13.2 lbs (6 kg) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons