Short answer: the Loxjie D40. It ranks #28 of 43 DAC and headphone amp combos by measured performance, rated 4.0/5, at $209.99; the xDuoo DM-01 ranks #41, rated 2.4/5, and costs $279, so there is not much of a tradeoff to weigh.
The Loxjie D40 is the better-sounding pick. Audio Science Review measured a SINAD of 122 dB, so its noise and distortion are inaudible. The catch: Loxjie doesn’t publish a 32 ohm power figure, and its headphone output is a single 6.35 mm jack with no balanced headphone option.
The case for the xDuoo DM-01: It supports a long list of Bluetooth codecs, including LDAC, aptX Adaptive and LC3, alongside USB-C. It supports aptX Adaptive Bluetooth, which the Loxjie D40 lacks. The catch: Audio Science Review measured just 38 dB SINAD, a severe and audible level of noise and distortion.
Buy the Loxjie D40. It is rated higher than the xDuoo DM-01 and costs less, so only choose the other one for a particular feature it does better.
Want more options? Browse the full Headphone Amps and DACs rankings.
Specifications Side By Side
| Loxjie D40 | xDuoo DM-01 | |
|---|---|---|
| Price | $209.99 | $279.00 |
| Ranked | #28 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 | 122 dB (measured by Audio Science Review) | 38 dB (measured by Audio Science Review) |
| Headphone Outputs | 6.35 mm | 6.35 mm |
| Balanced Output | Yes (XLR line out) | No |
| Inputs | USB, optical, coaxial, I2S, AES, Bluetooth | USB-C, Bluetooth |
| Outputs | RCA, XLR | AUX line out |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD, LDAC | SBC, AAC, aptX, aptX HD, aptX Adaptive, LDAC, LC3 |
| DAC Chip | 2 x ES9068AS | CS43131 |
| Dimensions | 9.4” x 1.7” x 7.7” (240 x 43 x 195 mm) | 6.9” x 3.4” x 2.4” (175 x 86 x 60 mm) |
| Weight | 2.4 lbs (1,100 g) | 1.6 lbs (730 g) |
| Output Power (32 ohms) | - | 1,500 mW (manufacturer rated) |
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- Schiit Magni Unity with Mesh DAC vs Loxjie D40
- Khadas Tone2 Pro vs Loxjie D40
- SMSL D12 vs Loxjie D40
- Fosi Audio K7 vs Loxjie D40
- Loxjie D40 vs Loxjie D30
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
Loxjie D40: $209.99 Amazon eBay
Pros: Audio Science Review measured a SINAD of 122 dB, so its noise and distortion are inaudible. It packs USB, optical, coaxial, I2S, AES and Bluetooth inputs with LDAC, aptX HD and AAC, plus RCA and balanced XLR line outputs for powered speakers or a separate amp.
Cons: Loxjie doesn’t publish a 32 ohm power figure, and its headphone output is a single 6.35 mm jack with no balanced headphone option. The SMSL DS20 rates higher for a little less, and at 1.1 kg in a wide chassis it is bulky for a desk.
Full Loxjie D40 review and specifications →
| Balanced Output | Yes (XLR line out) |
|---|---|
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD, LDAC |
| DAC Chip | 2 x ES9068AS |
| Device Type | DAC and headphone amp |
| Dimensions | 9.4” x 1.7” x 7.7” (240 x 43 x 195 mm) |
| Headphone Outputs | 6.35 mm |
| Inputs | USB, optical, coaxial, I2S, AES, Bluetooth |
| Outputs | RCA, XLR |
| SINAD | 122 dB (measured by Audio Science Review) |
| Weight | 2.4 lbs (1,100 g) |
- 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