 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| HomeDiscussion GroupsBoatsPaddle BoatsSailingCruisingBuildingElectronics Related Topics CarsMotorcyclesMore Topics ... |
Boat Forum / Cruising / April 2005Speaker Buzz need help!!
Hi I'm a newbie at wiring stereos so please bear with me. On my boat I installed a new Kenwood receiver and a new Sony CD changer. Connected to an older (6 yr.) Kenwood equalizer ans Sony 3040 that's the name amp. I've installed new speakers outside, checked and upgraded all my speaker wires and connections but there is a buzz in both sets and wasn't there in the old system. I've connected a ground wire from the stereo power neg busway to a copper strip which runs all thought out the boat. I've checked the resistance on the copper by setting my meter to 20K touch both prongs together and get 0.03 rating. I then placed both prongs on the copper wire and the resistance reads 0.03 but still the buzz. If I disconnect this #16 ground wire it of course gets louder. I've tried a heaver ground wire #8 no change still the buzz.The power wires +/- to the amp are #8 Where next do I get better RCA cables than Radio Shack and if I need a separate ground for the amp where do I attach it....to one of the mounting screws holding the amp to the boats wood interior? The buzz is making me crazy trying to get rid of it in both the radio or CD's. I've also turned off at the panel board all other items, no motor and still the buzz. Today I cleaned and tightened all battery connections you guess it still there > Hi I'm a newbie at wiring stereos so please bear > with me. On my boat I installed a new Kenwood receiver and a new Sony [quoted text clipped - 17 lines] > still the buzz. Today I cleaned and tightened all battery connections > you guess it still there Try turning off the refrigerator. CN You have to try a few things to isolate the problem. For instance, are you running any other gear? Shut everything down and disconnect shore power and the buzz should go away. Add things back until the buzz appears. Also, is the source FM, AM or a CD? Can you remove the equalizer from the circuit? Its unlikely that cheap cables are the problem unless they are actually broken. For more likely is interference coming in a power line, which can be solved with a filter. > Hi I'm a newbie at wiring stereos so please bear > with me. On my boat I installed a new Kenwood receiver and a new Sony [quoted text clipped - 17 lines] > still the buzz. Today I cleaned and tightened all battery connections > you guess it still there All good advice and most things I've checked, refer is off has been for a while and I had shut everything off at the panel no change in the buzzing so turned on items 1 by 1 still nothing different. Disconnected the dock power battery charger etc no change. The buzz is the same for CD's or FM radio and no on the equalizer as the system design is that from the receiver connects to the equalizer which connects RCA cables to the amp.Cables aren't broken and forgot maybe to mention but this system worked great for years while I cruised the Caribbean and elsewhere just recently lack of use I guess the receiver just quit. It was cheaper to replace than try and fix but the new receiver wouldn't accept the old CD player so I replaced that and somewhere along this process I got buzzing speakers to boot. I think its in the ground did you read my testing resistance on the copper stripping and anything wrong there? "I've connected a ground wire from the stereo power neg busway to a copper strip which runs all thought out the boat. I've checked the resistance on the copper by setting my meter to 20K touch both prongs together and get 0.03 rating. I then placed both prongs on the copper wire and the resistance reads 0.03 but still the buzz. If I disconnect this #16 ground wire it of course gets louder". > All good advice and most things I've checked, refer is off has been for > a while and I had shut everything off at the panel no change in the [quoted text clipped - 17 lines] > resistance reads 0.03 but still the buzz. If I disconnect this #16 > ground wire it of course gets louder". Do you have an inverter running? If so try unplugging it. My inverter makes a helluva buzz on the radio, especially AM stations. CN No the inverter isn't running I'm dockside and this is a new problem as for years no buzzing with the old system. Even cleaned all the battery terminals....When I remove the ground I have the buzzing gets worse when replace its less but still there. I've even tried a larger ga ground wire still there. > No the inverter isn't running I'm dockside and this is a new problem as > for years no buzzing with the old system. Even cleaned all the battery > terminals....When I remove the ground I have the buzzing gets worse > when replace its less but still there. I've even tried a larger ga > ground wire still there. Maybe the new stereo is defective? Seems like you've about ruled out everything else. Unless, of course, there's a new vessel in a slip on either side of you that is broadcasting interference. Get a portable little radio and walk around the dock close to neighboring vessels and see if you get the buzz. CN Neighbors are the same powerboats and nobody home.....If it is the new receiver which I got on eBay then I'll just live with it. Seems every time you upgrade on small piece of equipment you have to change a lot of things....isn't technology great. I'm still convinced something isn't grounded right maybe the amp but not sure where to attach another ground except to the mounting screws > Neighbors are the same powerboats and nobody home.....If it is the new > receiver which I got on eBay then I'll just live with it. Seems every > time you upgrade on small piece of equipment you have to change a lot > of things....isn't technology great. I'm still convinced something > isn't grounded right maybe the amp but not sure where to attach another > ground except to the mounting screws Yes, you should definitely ground the metal case. The ground wire for the current (usually black) is not enough. There should be a screw or pin on the metal case where you can connect a ground. CN > All good advice and most things I've checked, refer is off has been for > a while and I had shut everything off at the panel no change in the [quoted text clipped - 17 lines] > resistance reads 0.03 but still the buzz. If I disconnect this #16 > ground wire it of course gets louder". It sounds like a grounding problem or possibly a cable that isn't completely tightened down. I'm not expert on this, but I had a similar experience with a home system. Turned out it was an inline component cable not being on tight. The buzz would certainly get worse if you remove grounding cables, but I did the same experiment on my system, and that didn't narrow it down. > Hi I'm a newbie at wiring stereos so please bear > with me. On my boat I installed a new Kenwood receiver and a new Sony [quoted text clipped - 17 lines] > still the buzz. Today I cleaned and tightened all battery connections > you guess it still there You seem to have covered off most probable causes. It's possible the radio is defective, but doubtful. One thing not mentioned, you may have a ground loop. Ground loop: When two devices are both grounded, but the grounds that they both use are at 2 different potentials. When the 2 devices get connected together (for example the amp and the receiver) the difference in ground potential between the two devices gets connected via the audio connections and voila...a ground loop. As an experiment, try connecting a temporary wire between all devices and see if it corrects the problem. If you discover a connection between devices makes the buzz go away, you can correct the problem by re-grounding the offending device to a different ground point. M |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2009 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.