It was David Hafler (I believe) who proposed the "null" test for power amplifiers. Once an amplifier so tested produced zero sound, it would ipso facto be producing zero audible distortion, for any audible artifacts produced by an amp in a null test would be, by definition, distortion. Hafler put on demonstrations of his then current (late 80’s?) amplifier, in which the amp produced no sound when nulled. The test, and Hafler’s claims regarding the threshold of distortion audibility, was covered in both Stereophile Magazine and TAS at the time.
Do equipment stands have an impact on electronics?
Mechanical grounding or isolation from vibration has been a hot topic as of late. Many know from experience that footers, stands and other vibration technologies impact things that vibrate a lot like speakers, subs or even listening rooms (my recent experience with an "Energy room"). The question is does it have merit when it comes to electronics and if so why? Are there plausible explanations for their effect on electronics or suggested measurement paradigms to document such an effect?
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- 1146 posts total
- 1146 posts total