Quote:
Originally Posted by bodiezaffa
Hello,
In Frank Berryman’s review, he stated the amp ran completely silent.
When turning mine on (blue circle), there is a low but audible hum.
Is this normal or should it be absolutely silent like when it’s on standby mode.
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Is the hum from the speakers or from the transformer? I run my 403E straight to the 20A wall outlet and it's silent.
Are you using RCA or XLR? If you are using RCA inputs, be sure to short pin 2 to ground pin of XLR otherwise, the negative input of XLR will be floating. This will cause hum.
Richard