| Test | Classic Apple HP | 3G Apple HP | 4G Apple HP | 1G Nano Apple HP |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.14, -0.08 | +0.07, -2.85 | +0.09, -2.84 | +0.12, -0.69 |
| Noise level, dB (A): | -82.0 | -84.5 | -83.6 | -81.4 |
| Dynamic range, dB (A): | 81.8 | 84.3 | 83.8 | 81.1 |
| THD, %: | 0.0072 | 0.221 | 0.072 | 0.029 |
| IMD + Noise, %: | 0.306 | 0.920 | 0.897 | 0.473 |
| Stereo crosstalk, dB: | -41.3 | -27.2 | -42.4 | -33.3 |