| Test | Aune X1 MK2 USB 16/44 | Aune X1 MK2 USB 16/48 | Aune X1 MK2 USB 24/44 | Aune X1 MK2 USB 24/48 | Aune X1 MK2 USB 24/96 |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.02, -0.07 | +0.01, -0.07 | +0.01, -0.07 | +0.01, -0.07 | +0.01, -0.07 |
| Noise level, dB (A): | -95.7 | -96.3 | -105.9 | -105.8 | -105.8 |
| Dynamic range, dB (A): | 96.2 | 96.5 | 105.9 | 105.8 | 105.8 |
| THD, %: | 0.0010 | 0.0012 | 0.0010 | 0.0011 | 0.0022 |
| IMD + Noise, %: | 0.0047 | 0.0046 | 0.0023 | 0.0024 | 0.0030 |
| Stereo crosstalk, dB: | -85.9 | -85.5 | -85.9 | -85.9 | -85.8 |
