ABX Double Blind Test Results: Distortion
SMWTMS ABX Test Results
| Grundge Distortion | Result | Correct | p less than |
|---|---|---|---|
| 7% THD |
|
210 / 256 = 82% | 0.0005 |
| 3% THD |
|
154 / 242 = 64% | 0.0005 |
|
Grundge distortion was created by a diodes in feedback of op amp circuit. The op amp feedback resistors were adjusted to get the quoted THD percentage on a THD meter. |
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The different symbol means it is unlikely the percent correct score occurred by chance and thus the null hypothesis was disproven, which substantiates a real difference in sound quality. |
|
The same symbol means that it is likely the correct score occurred by chance, the null hypothesis is not rejected, which means no difference was found. It does remain possible a difference may be substantianted with further testing. |
Send questions or comments on the ABX Web Page to David Carlstrom.