| Test | Millett Hybrid 12AE6A+DB 13.5V 15mA 330 | Millett Hybrid 12AE6A+DB 13.5V 20mA 330 | Millett Hybrid 12AE6A+DB 13.5V 25mA 330 |
| Frequency response (from 40 Hz to 15 kHz), dB: | +0.04, -0.04 | +0.04, -0.05 | +0.04, -0.05 |
| Noise level, dB (A): | -85.8 | -86.3 | -86.3 |
| Dynamic range, dB (A): | 85.2 | 84.8 | 85.8 |
| THD, %: | 0.297 | 0.319 | 0.319 |
| IMD + Noise, %: | 0.277 | 0.296 | 0.297 |
| Stereo crosstalk, dB: | -82.3 | -82.5 | -82.2 |