| Test | APUSB | ZeroDAC(modded)+Earth (Coaxial) | ZeroDAC(modded)+Earth (Optical) |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.02, -0.10 | +0.06, -0.48 | +0.06, -0.48 |
| Noise level, dB (A): | -92.8 | -92.1 | -92.7 |
| Dynamic range, dB (A): | 91.6 | 91.3 | 91.2 |
| THD, %: | 0.0019 | 0.0057 | 0.0058 |
| IMD + Noise, %: | 0.0075 | 0.0099 | 0.010 |
| Stereo crosstalk, dB: | -94.1 | -94.3 | -93.6 |
