ABX Chamber of Horrors Grundge Processor
| Ohms | 2 k | 10 k | 20 k | 100 k | 200 k | 1 M | 2 M | 10 M |
| THD | 28% | 14% | 9% | 2.2% | 1.1% | 0.22% | 0.11% | 0.02% |
| The Grundge Box adds even order distortion that is independent of level and independent of frequency. There is no change in RMS output as the distortion amount is varied by the rheostat. The distortion levels for a few resistances are given in the table. |
Send questions or comments on the ABX Web Page to David Carlstrom.