HT5R head gets louder after an hour of playing

General Discussion Forum - Voice The Sound In Your Head
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robeisner
Posts: 1
Joined: Wed Jan 16, 2019 9:00 pm

Fri Feb 01, 2019 9:57 pm

As the title says, when I'm gigging with my HT5R head (which I run through a Marshall 1x12 cab) after the amp has been on for an hour or so it begins to get louder (and not due to me turning the volume up!). I only use it on the clean channel.
Can anyone give me any clues as to why or what I can do to fix it? I assume it's due to something getting hot?

Thanks

Rob

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