| Test | E1405 16 Ohm (ep630) | E1405 No Load | E1405 32 Ohm (Ipod buds) | E1405 16 Ohm Repeat |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.74, -0.75 | +0.74, -0.75 | +0.74, -0.75 | +0.76, -0.77 |
| Noise level, dB (A): | -65.3 | -65.3 | -65.2 | -65.1 |
| Dynamic range, dB (A): | 64.8 | 65.0 | 64.9 | 65.0 |
| THD, %: | 2.302 | 0.037 | 0.175 | 2.725 |
| IMD + Noise, %: | 1.765 | 0.162 | 0.152 | 2.109 |
| Stereo crosstalk, dB: | -64.5 | -64.2 | -64.2 | -63.2 |