Persistent Whine in Cockpit Speakers

[aroos]

We have a C30 with the stock Fusion stereo system. There are 4 pairs of speakers including a pair in the cockpit. When the house power is on, even with the stereo off, we get a non-stop high pitched whine out of the cockpit speakers and only those speakers. It's there when music plays as well. To those with well preserved high pitch hearing it's very annoying when at rest in an otherwise quiet environment. We've had a very good boat stereo tech out 2 times and he's installed and then replaced a surpressor (?) on the output for the cockpit speakers. It works initially and then the whine returns. I've experimented at anchor turning off all power draws one by one (2 fridges, wine cooler, lights, etc.) but nothing eliminates the whine apart from turning the house battery switch off. The solar panel is, of course, operating so perhaps that's the issue. Any ideas?

 

[knotflying]

I wish I could get wine from my cockpit speakers!! :lol:

 

[HRowland]

Yours may be like the R29s which I believe have a separate zone amplifier for the cockpit speakers. This amp is supposed to automatically power on when audio is present. There may be a problem with this amp.

Howard

 

[Mystical]

Our 29 does it as well. we have tried everything to get rid of it, but at this point just deal with it.

 

[linedoctor]

I've worked quite a bit with supporessors when I was in the telecommunications industry. They best place to put them is at the connection between the speaker wire and the speaker....in other words, as close to the speaker as physically possible.