Re: Stereo Buzzing sound
Skip the Radio Shack route. Go to a real quality stereo shop, the higer end ones that have guys that install custom systems on boats and vehicles. They will know what you need. Those guys do it all day and dont mess with junk, they cant afford to do things twice... Not that you need to have them do any work, just give them the symptoms and take the time to get the model #s of the stereo and amp, and have the specs for the stereo and any amps or equalizers so they can tell you what you need. The more you have to give them , shows them you are serious and have your stuff together, You should go in person, I find that best, especially if you are nice. It shows them that you have a real need, and gives them a chance to sell you what you need. If the ground is shared with the engine, that will induce noise. You can move the ground wire around to also help "find" a quieter spot, as the stereo itself is usually not close to the alternator, but because the juice is coming from the battery and the battery is being charged by the alternator= noise. New engines have high voltage ignition systems, so = even more chance of noise. You can get "a" noise suppressor, but they make different sizes and quality matters ! You may need a supressor that attaches in-line with alternator to battery AND one that goes between the battery and the stereo AND one that goes between battery and amp. The more the quieter....
Good boating..