Doctor Smith
Prominent Member
I have a BK P12 300 connected to a denon amp via a single phono cable.
I was watching a quiet movie last night when I noticed a slight hum coming from my sub.
When there is no sound source going to the sub but power and phono cable are connected I can hear the hum. When I turn up gain volume the hum gets louder.
If I unplug phono cable but leave sub powered on the hum disappears. The phono cable is 5 metres long. Any ideas?
Cable was quite expensive so I want to be certain it's a faulty cable before I replace it. Thanks
I was watching a quiet movie last night when I noticed a slight hum coming from my sub.
When there is no sound source going to the sub but power and phono cable are connected I can hear the hum. When I turn up gain volume the hum gets louder.
If I unplug phono cable but leave sub powered on the hum disappears. The phono cable is 5 metres long. Any ideas?
Cable was quite expensive so I want to be certain it's a faulty cable before I replace it. Thanks