derrickdj1 Posted September 16, 2015 Share Posted September 16, 2015 Try a Y spliter on the sub end into the red and white sub jack. Quote Link to comment Share on other sites More sharing options...
Mikekid Posted September 16, 2015 Author Share Posted September 16, 2015 Never thought of that either.... Will have to go get another one as the one I have is being used for the single sub out on the back of the receiver. Do you think I should use one on both subs? Thanks derrickdj1. Quote Link to comment Share on other sites More sharing options...
babadono Posted September 16, 2015 Share Posted September 16, 2015 I believe the sound you are hearing is noise induced onto the input cable upon a static discharge. The static is using the shield on your cable to get to ground which induces a common impedance mode noise into the input of your sub which is single ended(not balanced) and therefore has very low CMR. The solution(or at least partial solution) is to give the static an easier path to ground. Does the sub have 2 or 3 prong input power cable? 3 Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted September 16, 2015 Share Posted September 16, 2015 The Y splitter plugged into both sub inputs helps prevent EMF ( Eletromagnetic Force) and RF(Radio Frequency). Quote Link to comment Share on other sites More sharing options...
Mikekid Posted September 17, 2015 Author Share Posted September 17, 2015 Both subs are 3 prong. I'll try an adapter tomorrow and get back. Thanks! Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted September 17, 2015 Share Posted September 17, 2015 Both subs are 3 prong. I'll try an adapter tomorrow and get back. Thanks! I'd be really surprised if that fixed it. The problem is on the signal side as Eric stated. If there was a practical way to ground the couch, that would probably take care of your problem. What material is on the cushion covers? Quote Link to comment Share on other sites More sharing options...
Mikekid Posted September 17, 2015 Author Share Posted September 17, 2015 The couch covers are cloth. It is a recliner at both ends, so most of the frame is metal. Quote Link to comment Share on other sites More sharing options...
minermark Posted September 17, 2015 Share Posted September 17, 2015 Both subs are 3 prong. I'll try an adapter tomorrow and get back. Thanks! First things first. Three prong plugs is what you want, plug them into a KNOWN grounded outlet. My question is: are these outlets REALLY Grounded? have you checked? 1 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted September 17, 2015 Share Posted September 17, 2015 so most of the frame is metal. If the legs are metal, I'd try some of those rubber carpet saver discs under each leg. They would insulate it from the carpet and in turn cable. They're cheap. 1 Quote Link to comment Share on other sites More sharing options...
twistedcrankcammer Posted September 17, 2015 Share Posted September 17, 2015 Carl, I didn't know you were a professor. Better than being the Skipper or Gilligan. Put your white floppy hat on to cover up your baldness and you look like Gilligan though! Rog Quote Link to comment Share on other sites More sharing options...
Mikekid Posted September 20, 2015 Author Share Posted September 20, 2015 CEC... The couch is built on a metal base running around the entire edge of couch. It's a heavy sob. No legs. I know you guys are right in that it's a ground issue creating static running through the sub cable. I am going to look for some kind of thin rubber, or wood runners to put under the entire metal base of this thing. Just need to find something fairly thin, but tall enough to clear this rug so we don't have to use a ladder to get on the couch. (We are kind of short people) I think you have me going the right direction ..... I have not tried the foil option yet. Going to the store soon. Worth a try too. Thanks so much for all the replies here!~ And a few good laughs too! Mike. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted September 20, 2015 Share Posted September 20, 2015 Let us know how it turns out. 2 Quote Link to comment Share on other sites More sharing options...
JL Sargent Posted September 20, 2015 Share Posted September 20, 2015 Eh, get a bottle of Downy fabric softener and mix in a spray bottle with water. Spray across the seating area of the couch. I bet this corrects the problem. Quote Link to comment Share on other sites More sharing options...
A1UC Posted September 20, 2015 Share Posted September 20, 2015 (edited) Sure its the sub Edited September 20, 2015 by A1UC 1 Quote Link to comment Share on other sites More sharing options...
Mikekid Posted September 20, 2015 Author Share Posted September 20, 2015 (edited) CECAA850, I just finished wrapping the sub cable behind the couch with 2 layers of tinfoil and then stuffed it back under. All of these years listening to this and it was as simple as wrapping in tinfoil!!!! 90% FIXED! We can barely hear it now. This is one of the reasons I have been checking in to this forum for so many years now (June 1999). I appreciate you and the others here more than you know. If you ever wind up out here in western Montana, I owe you a dinner. Thanks so much! Mike. Edited September 20, 2015 by Mikekid Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted September 21, 2015 Share Posted September 21, 2015 Awesome! 1 Quote Link to comment Share on other sites More sharing options...
babadono Posted September 22, 2015 Share Posted September 22, 2015 (edited) I'm having a hard time wrapping my mind around why this works. Are we talking about the signal input cable being wrapped with tinfoil? Or the power cord? Or both? And then it is just floating? Anybody got an explanation? Oh and BTW its aluminum foil not tin right? Edited September 22, 2015 by babadono Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted September 22, 2015 Share Posted September 22, 2015 Oh and BTW its aluminum foil not tin right? I'd assume so. I've been saying "tin" as opposed to "aluminum" foil for years. I guess out of laziness. Quote Link to comment Share on other sites More sharing options...
babadono Posted September 22, 2015 Share Posted September 22, 2015 Oh and BTW its aluminum foil not tin right? I'd assume so. I've been saying "tin" as opposed to "aluminum" foil for years. I guess out of laziness. Funny how things get ingrained in our culture, the product's been made out of aluminum for who knows how long but we all still say "tinfoil". It is not your laziness I don't think. Quote Link to comment Share on other sites More sharing options...
artto Posted September 27, 2015 Share Posted September 27, 2015 (edited) Both subs are 3 prong. I'll try an adapter tomorrow and get back. Thanks! First things first. Three prong plugs is what you want, plug them into a KNOWN grounded outlet. My question is: are these outlets REALLY Grounded? have you checked? Wrong! All your equipment should be grounded at one point only. Everything else should have their grounds isolated (lifted) with a 3 to 2 prong adapter. This lets the system ground "float" and seek it's own level and avoids ground loops (which can be even more dangerous). "Ideally" one would have their audio equipment on a separate circuit using it's own isolated ground (isolated from the rest of the circuits in the building). Yes, check to make sure the electrical outlet that everything is plugged into is actually grounded. Also check that the polarity is correct. Many older homes are not. Floating grounds in home wiring were generally allowed well into the 80's. You can buy a polarity checker at most hardware and electrical parts stores. The electrical ground wire is usually green. If there isn't any green wire in the electrical outlet junction box then the building is just sending the ground through the wiring conduit. Building codes vary by location/community, and change over time. If static electricity is getting in the signal line you might have a loose connection (cable or equipment connector). If you live in a dry climate you might want to consider a humidifier. Also consider a permanent static treatment for the upholstery and carpet. Edited September 27, 2015 by artto Quote Link to comment Share on other sites More sharing options...
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