| Test | 12AE6A 12V 330 | 12AE6A 13.5V 330 | 12AE6A 15V 330 | 12AE6A 16.5V 330 |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.04, -0.04 | +0.04, -0.04 | +0.04, -0.04 | +0.04, -0.04 |
| Noise level, dB (A): | -85.9 | -86.1 | -86.1 | -86.3 |
| Dynamic range, dB (A): | 85.3 | 85.6 | 85.7 | 85.8 |
| THD, %: | 0.262 | 0.287 | 0.421 | 0.339 |
| IMD + Noise, %: | 0.255 | 0.263 | 0.405 | 0.319 |
| Stereo crosstalk, dB: | -83.5 | -83.0 | -83.2 | -82.7 |