Static in starboard cockpit speaker only

radiojon

New Member
Sep 2, 2012
102
Franklin, TN
Boat Info
320 Sundancer 2005
Engines
Mercruiser 350 w/Bravo III Drives
Went out to the boat to work on a few projects and an intermittent problem from last year has re-appeared. Whenever I turn on the cockpit stereo on my 320DA, I get this very annoying static/hiss in one of the starboard speakers (the one mounted on the radar arch). The intensity will vary -- sometimes softer, sometimes louder -- but it won't go away. I've changed out speakers and the static still appears in just that one location, so it's not a speaker issue. The static can also be heard in the small tweeter speaker in just that location, as well; everywhere else, the sound is great.

I tried tracing the route of the speaker wire, but it just seems to disappear straight down the arch and below deck. I have no idea how it's routed back to the radio in the cabin and/or the amps below my salon sofa. I did find what looked like a negative bus bar labeled "cockpit stereo" on the forward wall of the engine room below the battery charger, but all of those connections seemed to be very secure.

The only change I've ever made to the stereo system is adding an "aux" connection next to the cockpit remote stereo controls at the helm; I routed that RCA cable back through the starboard side of the boat behind the DC panel in the salon and attached to the existing Clarion AUX connectors. But the static wasn't an issue in the beginning at all. It only started appearing late last summer.

Not sure if it's related, but I did notice that my stereo memory presets were somehow reset sometime between late fall and when I went to the boat yesterday ... as if the batteries had been disconnected and re-attached. I've had my boat on shore power in the slip the whole winter with the battery charger on and no power outages (I get an automatic email if the boat sensors don't "check-in" over 4 hours). I disconnected the cockpit refrigerator in the fall to replace it, but I only remember turning off the single breaker for the frig on the DC panel in the engine room for that, so I can't imagine how the stereo presets disappeared.

Any idea on where to look for the culprit? Thanks! Sure can't wait for boating season again!

- Mark
 
Its sound like it could be the amp connection, I had this issue on my current boat and also on my 420DA.
 
Had a friend of mine also suggest checking the amp connections. I know my amps are located under my salon sofa, but the speaker wire connections are on the opposite side of what I can access through the hinged hatch near the floor.

How do I remove the slider sofa seat to be able to access the amps entirely to check the connections on the back side? I remember trying to detach the sliding cushion before without being able to get it off -- it just slid in and out.

Thanks!

- Mark
 
I think the back cushions lift up, that's how it was with my 2005 420DA. The cushions had pins and velcro to keep them in place.
 
How much force should I use doing that, Jon? To be clear, you're saying to first slide the sofa all the way out, THEN try lifting up on the back cushion from the bottom? I don't want to break anything. :)

Thanks!
 
Jon I have the same problem except my static is in the cabin. It's definitely the amp so be prepared to swap it with a new one.
 
The amp on my 320 was in the cubby compartment under the salon couch just opened the door and there it was,
also on this boat one set of speakers where hissing all season I just swappws the head unit to a fusion and still the hissing continued,, I swapped the amp for the salon speakers and all the hissing disappeared! It's definenately your amp.
 
Wow, you guys nailed it. Got under the sofa and checked out the amp wiring today. Sure enough, I was able to isolate it to the RR speaker connection on the Clarion APX480M. Multimeter readings were all over the place for that channel so I guess the whole amp is shot. Any idea on whether it can be fixed or should I just replace it? This particular model has been discontinued, so I'd be looking at a $275 or so replacement.

Thanks again for the help!

- Mark
 
Pitch it and buy a new JL or wet sounds amp.


Sent from my iPhone using Tapatalk
 
In the process of swapping all of mine now to JL audio and ordered JL Mx 650's and JL M 10" sub for the cockpit!!!!
If your upgrading the amp check the guage of wire from the power supply to the amp. The audio guy recommended I check mine to make sure its 4awg I believe. While your changing it out.
 

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