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Author Topic: Soft Clipping Test  (Read 395 times)

David Samborsky

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Soft Clipping Test
« on: September 24, 2020, 11:24:11 AM »
Introduction

The Ultimate Preamplifier features a soft clipping feature which clips in much the same way a push-pull tube amplifier does but does so more accurately and consistently.

Measurements


Conclusion

The soft clipping works extremely well and in textbook fashion according to the measurements below. In fact it works so well there are no more distortion artifacts above 3rd order so even the most ardent of tube aficionados would welcome its tube like characteristics which can be turned on or off at will.



« Last Edit: September 25, 2020, 06:45:21 AM by David Samborsky »
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David Samborsky

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Soft Clipping of 1kHz sinewave at 0dB full scale.
« Reply #1 on: September 24, 2020, 11:29:34 AM »


Symmetrical clipping means the absence of 2nd harmonic distortion and dominating 3rd harmonic distortion but no higher frequency distortion artifacts which should be music to the ears of tube aficionados.

« Last Edit: September 25, 2020, 04:04:28 AM by David Samborsky »
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David Samborsky

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Soft Clipping of 1kHz sinewave at -10dB full scale.
« Reply #2 on: September 24, 2020, 11:34:12 AM »



« Last Edit: September 25, 2020, 04:04:45 AM by David Samborsky »
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Soft Clipping of 1kHz sinewave at -20dB full scale.
« Reply #3 on: September 24, 2020, 11:35:25 AM »
« Last Edit: September 25, 2020, 04:05:01 AM by David Samborsky »
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Soft Clipping of 1kHz sinewave at -30dB full scale.
« Reply #4 on: September 25, 2020, 03:56:44 AM »
« Last Edit: September 25, 2020, 04:05:17 AM by David Samborsky »
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David Samborsky

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Soft Clipping Sweep of THD + N vs Amplitude.
« Reply #5 on: September 25, 2020, 03:59:24 AM »
Below -35dBFS the measurements are dominated by noise !

« Last Edit: September 25, 2020, 04:15:39 AM by David Samborsky »
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