Monitor Audio Radius 370HD Hum Problem with 12v Trigger


Active Member

Looking for any thoughts with the problem of a very noticeable 'hum' when I connect my Monitor Audio R370HD sub to an Onkyo TX-SR806 amplifier and switched/controlled by the 12v trigger. When the sub is switched on via the 'on' or 'auto' position there is no hum; the hum is only present when the on/auto/12v trigger switch on the sub is in the 12v trigger position, and the 12v signal from the Onkyo 806 is active.

Thanks in advance,

Last edited:

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