I have bareknuckle nailbomb on my guitar. i plug it straight to my amp (backstar ht 20) every time i switch of gain channel with the slightly pass 12 o'clock my pickup started to hum. my question is it normal for humbucker to hum at that amount of gain. i really need to know , because, most of the forum i read they said that only single coil would hum and humbuckers won't if what i read was true i think there is a problem with my guitar. can anyone help me with this?