| Test | Cowon D2 - 12 Ohm (SF5EB) | Cowon D2 - 16 Ohm (Vibe) | Cowon D2 - 32 Ohm (Atrio) | Cowon D2 - 48 Ohm (ER-6) |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.62, -5.61 | +0.32, -3.53 | +0.15, -1.38 | +0.10, -0.75 |
| Noise level, dB (A): | -91.8 | -92.7 | -92.8 | -92.8 |
| Dynamic range, dB (A): | 91.9 | 92.7 | 92.8 | 92.8 |
| THD, %: | 0.213 | 0.084 | 0.032 | 0.028 |
| IMD + Noise, %: | 0.141 | 0.059 | 0.051 | 0.034 |
| Stereo crosstalk, dB: | -38.7 | -42.8 | -48.1 | -50.6 |
