| Test | 12FM6 12V 330 | 12FM6 13.5V 330 | 12FM6 15V 330 | 12FM6 16.5V 330 |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.04, -0.03 | +0.04, -0.03 | +0.04, -0.03 | +0.04, -0.03 |
| Noise level, dB (A): | -89.9 | -89.9 | -90.4 | -90.6 |
| Dynamic range, dB (A): | 89.6 | 89.9 | 89.7 | 90.3 |
| THD, %: | 0.635 | 0.848 | 0.644 | 0.715 |
| IMD + Noise, %: | 0.611 | 0.800 | 0.595 | 0.683 |
| Stereo crosstalk, dB: | -86.8 | -86.1 | -87.2 | -87.7 |
