| Test | 12FM6 16.5V 33 | 12FM6 16.5V 330 |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.04, -0.11 | +0.04, -0.03 |
| Noise level, dB (A): | -94.9 | -90.6 |
| Dynamic range, dB (A): | 94.1 | 90.3 |
| THD, %: | 1.093 | 0.715 |
| IMD + Noise, %: | 1.065 | 0.683 |
| Stereo crosstalk, dB: | -67.7 | -87.7 |