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  1. S

    Topping A90 Headphone Amplifier Review

    The issue is with the knob and not the actual pot. I unfortunately can't tell you how the knob is attached.
  2. S

    Topping A90 Headphone Amplifier Review

    Is it normal for the volume knob to be this loose before gripping the pot? Makes it really hard to make small volume changes.
  3. S

    Topping A90 Headphone Amplifier Review

    I'm in the same boat as you. If you go to the product page it now says we have to wait a few weeks.
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