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 Leckerton Audio UHA-6S.MKII ranks #40, rated 2.5/5, and costs $239, so there is not much of a tradeoff to weigh.
The Loxjie D40 is the better-sounding option. Audio Science Review measured a SINAD of 122 dB, so its noise and distortion are inaudible. The tradeoff: 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 Leckerton Audio UHA-6S.MKII: It is a portable battery powered DAC and amp with micro USB, optical, coaxial and 3.5 mm analog inputs, lasting 10 hours from digital sources and 30 hours in analog mode. The catch: It is rated for only 55 mW into 32 ohms with its stock op amp, which suits in-ear monitors and easy headphones only, and sensitive in-ears may reveal hiss at 94 dB SINAD.
Buy the Loxjie D40. It is rated higher than the Leckerton Audio UHA-6S.MKII 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
| Loxjie D40 | Leckerton Audio UHA-6S.MKII | |
|---|---|---|
| Price | $209.99 | $239 |
| Ranked | #28 of 43 in DAC and Headphone Amp Combos | #40 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) | 94 dB (measured by Audio Science Review) |
| Headphone Outputs | 6.35 mm | - |
| Balanced Output | Yes (XLR line out) | No |
| Inputs | USB, optical, coaxial, I2S, AES, Bluetooth | Micro USB, optical, coaxial, 3.5 mm analog |
| Outputs | RCA, XLR | - |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD, LDAC | - |
| DAC Chip | 2 x ES9068AS | Cirrus Logic CS4398 |
| Dimensions | 9.4” x 1.7” x 7.7” (240 x 43 x 195 mm) | 2.8” x 0.8” x 4.2” (70 x 20 x 106 mm) |
| Weight | 2.4 lbs (1,100 g) | 0.4 lbs (170 g) |
| Output Power (32 ohms) | - | 55 mW (manufacturer rated, stock AD8610 op-amp; 140 mW with AD8620) |
| Output Power (300 ohms) | - | 40 mW (manufacturer rated) |
| Battery Life | - | 10 hours (USB/digital), 30 hours (analog) |
| Volume Control | - | Analog |
Related Amp and DAC Comparisons
How Loxjie D40 compares with other leading options:
- 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
Leckerton Audio UHA-6S.MKII: $239 Leckerton Audio eBay
Pros: It is a portable battery powered DAC and amp with micro USB, optical, coaxial and 3.5 mm analog inputs, lasting 10 hours from digital sources and 30 hours in analog mode. Audio Science Review measured a SINAD of 94 dB, fine for most headphones.
Cons: It is rated for only 55 mW into 32 ohms with its stock op amp, which suits in-ear monitors and easy headphones only, and sensitive in-ears may reveal hiss at 94 dB SINAD. It has no balanced output and still uses micro USB. The Pro-Ject Pre Box S2 Digital rates higher and measures cleaner, though it costs more.
Full Leckerton Audio UHA-6S.MKII review and specifications →
| Balanced Output | No |
|---|---|
| Battery Life | 10 hours (USB/digital), 30 hours (analog) |
| DAC Chip | Cirrus Logic CS4398 |
| Device Type | DAC and headphone amp |
| Dimensions | 2.8” x 0.8” x 4.2” (70 x 20 x 106 mm) |
| Inputs | Micro USB, optical, coaxial, 3.5 mm analog |
| Output Power (300 ohms) | 40 mW (manufacturer rated) |
| Output Power (32 ohms) | 55 mW (manufacturer rated, stock AD8610 op-amp; 140 mW with AD8620) |
| SINAD | 94 dB (measured by Audio Science Review) |
| Volume Control | Analog |
| Weight | 0.4 lbs (170 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons