MirageTool Posted September 9, 2013 Share Posted September 9, 2013 Hi, I was looking inside one of my speaker cabs today to try and identify the cause to a hf issue and found that the screws and part of the chasis to be rusty http://i928.photobucket.com/albums/ad122/Mirage_Tool/null_zpse39c2cf4.jpg Is this normal ? What is the cause ? Thanks Phil The speakers are approx 7 years old Link to comment Share on other sites More sharing options...
J Pearce Posted September 9, 2013 Share Posted September 9, 2013 I'd guess the cause to be humidity, that's what normally causes rust.Where are the cabs stored? Link to comment Share on other sites More sharing options...
MirageTool Posted September 9, 2013 Author Share Posted September 9, 2013 There are in a converted garage, we have a dehumidifier and a small heater that we put on frost protection in the winter. Link to comment Share on other sites More sharing options...
J Pearce Posted September 9, 2013 Share Posted September 9, 2013 I'd guess your dehumidifier isn't as effective as you think it is. It could also be from internal condensation where your cabs are moved from a hot sweaty event to a cold garage. Link to comment Share on other sites More sharing options...
kerry davies Posted September 9, 2013 Share Posted September 9, 2013 Left in the van overnight? Ever do outdoor gigs? Even left overnight in tents they could get "rained" on. Any form of condensation will do it. But at 7 years old it could be just about anything. Link to comment Share on other sites More sharing options...
MirageTool Posted September 9, 2013 Author Share Posted September 9, 2013 Thanks for the replies everyone Phil Link to comment Share on other sites More sharing options...
S&L Posted September 10, 2013 Share Posted September 10, 2013 a dehumidifier - if properly sized and maintained (i.e. moisture drained away regularly) may drop your humidity level to say 40% RH - unlikely to be much lower. and it is unlikely to respond speedily to changes in RH. at 5am just before sunrise, when your garage is coldest, the temperature may easily plummet and with your actual kg of moisture in the air fixed, your dehumidifier will kick in and so will your back ground heater but may take quite some time to restore the RH level and temperature - because as temperature drops with moisture quantity fixed, RH rises - i.e. the room becomes fractionally more humid. the metal parts in your garage will be the coldest of all. any moisture in the air will drop out of solution and condense on the cold surface. any untreated/unplated metal will be most vulnerable. Now if the moisture level in the room rises as described by other poster that will make matters worse.what will make matters considerably worse is if your dehumid unit does not automatically drain externally or does not have a sealed drain pan that is emptied regularly. Link to comment Share on other sites More sharing options...
laolu Posted September 10, 2013 Share Posted September 10, 2013 Here in the tropics, we have another very annoying phenomenon: Foam-rubber parts dissolve after a few years, from the humidity, no matter if in flight cases, headphone cushions or in front of speaker cabs. Re your original post: What was the original HF issue that led you to open the cabs? Did it have anything to do with the rust? Did you solve the problem? Norbert Link to comment Share on other sites More sharing options...
MirageTool Posted September 10, 2013 Author Share Posted September 10, 2013 The original problem was just the spade connector had come off, a simple tweak with a pair of pliers and hey presto. Link to comment Share on other sites More sharing options...
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