Invective MH noise when tapping the head (hear the tapping through speaker)

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nyandres
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Joined: Fri Jan 07, 2022 10:58 pm

Invective MH noise when tapping the head (hear the tapping through speaker)

Post by nyandres » Fri Jan 07, 2022 11:57 pm

I am trying to figure out if there is simple something wrong with my amp. So this is the second invective i buy (used) which has this issue. The issue is similar to how a microphonic tube behaves on most amps.

So the issue is that given the settings below, if I tap the amp head or knobs or anything really with my hands, I can actually hear my tapping amplified through the cabinet. It happens even without a guitar cable connected with the setting below
* Amp on full power 22 watts mode
* Noise Gate switch Disabled
* Tight Switch Disabled
* The lead channel. Gain doesnt need to be all the way but the issue becomes louder with more gain (again even without a guitar cable connected)

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