Plinius Hiato - Hum when phono selected

admin_exported

New member
Aug 10, 2019
2,556
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As above, I have this amplifier and it came with the phono option although I do not use it. When phono is selected there is a loud hum through the speakers. I turned the phono gain (dip switches) to minimum and this reduced the hum but it is still there. Any ideas?

Thanks
 

nopiano

Well-known member
If you have nothing connected it will hum. Perfectly normal.

You might find shorting plugs helpful, but if it were me I'd just avoid that input. Because it is for phono cartridges it is much higher gain than the other inputs, and it is equalised to emphasise bass (there isn't much on records), hence the hum becomes prominent.
 
A

Anonymous

Guest
That seems to make sense. May hook up a TT in the future so hope the hum goes then!
 

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