| Test | 12AE6A 16.5V 33 | 12AE6A 16.5V 330 |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.04, -0.13 | +0.04, -0.04 |
| Noise level, dB (A): | -91.0 | -86.3 |
| Dynamic range, dB (A): | 90.6 | 85.8 |
| THD, %: | 0.513 | 0.339 |
| IMD + Noise, %: | 0.508 | 0.319 |
| Stereo crosstalk, dB: | -69.1 | -82.7 |