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I've been using this amplifier for a while now, and loving it, however for a few months now my audio has been crackling while adjusting the volume knob in any direction from 0-100. Any adjustment I make results in crackles and noise (the audio itself still sounds fine when playing music at a set volume). Is this an issue with my amplifier or could it be my DAC or headphone cable? I'm using a Grace Design Balanced Dac and using XLR cables.

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marsykev
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jgillingham
71
Jul 1, 2021
It's likely to be an amplifier issue. Maybe the contact surfaces inside the volume control are worn or dirty, or maybe a faulty coupling capacitor (if there are any in this amp) allows DC voltage on the volume control, which can cause the symptoms you describe even if the control is in excellent condition.