dks5276 Posted December 1, 2014 Share Posted December 1, 2014 I put a ground loop on it and it cut the humming down 90%, my question is i seen on threads to replace capacitors on the amp, are they referring to the amp on sub or on receiver? Quote Link to comment Share on other sites More sharing options...
Anotherforumname Posted December 2, 2014 Share Posted December 2, 2014 Capacitor on the sub amp usually. but sometimes its more or less to it than that. Does your sub hum when nothing is plugged into it? Quote Link to comment Share on other sites More sharing options...
dks5276 Posted December 2, 2014 Author Share Posted December 2, 2014 (edited) Capacitor on the sub amp usually. but sometimes its more or less to it than that. Does your sub hum when nothing is plugged into it? it only humms when i turn on my receiver , i put a ground loop on it and its 90% effective Edited December 2, 2014 by dks5276 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted December 2, 2014 Share Posted December 2, 2014 Try a new cable yet? Quote Link to comment Share on other sites More sharing options...
dks5276 Posted December 2, 2014 Author Share Posted December 2, 2014 Try a new cable yet? ive tried several diff cables, im praying its not my receiver, id rather it be the sub since im looking to get new subs Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted December 2, 2014 Share Posted December 2, 2014 You might try THIS next then. Quote Link to comment Share on other sites More sharing options...
babadono Posted December 2, 2014 Share Posted December 2, 2014 I put a ground loop on it and it cut the humming down 90%, my question is i seen on threads to replace capacitors on the amp, are they referring to the amp on sub or on receiver? Added a what? What's a ground loop? Need to get rid of them not add them. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted December 2, 2014 Share Posted December 2, 2014 Added a what? For some reason I assumed it was a cheater plug. I have no idea why I did. Quote Link to comment Share on other sites More sharing options...
babadono Posted December 2, 2014 Share Posted December 2, 2014 Yeah me too Added a what? For some reason I assumed it was a cheater plug. I have no idea why I did. Yeah me too. But I want the OP to be specific so we can truly help him. Quote Link to comment Share on other sites More sharing options...
babadono Posted December 2, 2014 Share Posted December 2, 2014 (edited) So OP is that what you did, put a ground lifting(cheater) plug on your sub power cable? Edited December 2, 2014 by babadono Quote Link to comment Share on other sites More sharing options...
dks5276 Posted December 2, 2014 Author Share Posted December 2, 2014 (edited) I put a ground loop on it and it cut the humming down 90%, my question is i seen on threads to replace capacitors on the amp, are they referring to the amp on sub or on receiver? Added a what? What's a ground loop? Need to get rid of them not add them. i put a ground loop isolator on them , it goes in between the receiver and sub one very similar to this http://www.radioshack.com/ground-loop-isolator/2700054.html#.VH4QGTHF91Q Edited December 2, 2014 by dks5276 Quote Link to comment Share on other sites More sharing options...
dks5276 Posted December 2, 2014 Author Share Posted December 2, 2014 (edited) So OP is that what you did, put a ground lifting(cheater) plug on your sub power cable? i put a ground loop isolator on them , it goes in between the receiver and sub one very similar to this http://www.radioshack.com/ground-loop-isolator/2700054.html#.VH4QGTHF91Q Edited December 2, 2014 by dks5276 Quote Link to comment Share on other sites More sharing options...
babadono Posted December 2, 2014 Share Posted December 2, 2014 (edited) Ok you put an isolator in line with the signal input and it helped a lot. Can we step back? Did it ever not hum? What happened to make it start humming? Edited December 2, 2014 by babadono Quote Link to comment Share on other sites More sharing options...
dks5276 Posted December 2, 2014 Author Share Posted December 2, 2014 Ok you put an isolator in line with the signal input and it helped a lot. Can we step back? Did it ever not hum? What happened to make it start humming? it just starting humming one day, I researched and it was said that sometimes the capacitors go bad or dry out and can cause this, so i just assumed maybe this was the case...is there a way of testing the caps to see if they are bad before replacing them? Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted December 2, 2014 Share Posted December 2, 2014 Ok you put an isolator in line with the signal input and it helped a lot. Can we step back? Did it ever not hum? What happened to make it start humming? Maybe this is one of those musical subs that I keep hearing about, lol. Quote Link to comment Share on other sites More sharing options...
babadono Posted December 2, 2014 Share Posted December 2, 2014 Ok you put an isolator in line with the signal input and it helped a lot. Can we step back? Did it ever not hum? What happened to make it start humming? it just starting humming one day, I researched and it was said that sometimes the capacitors go bad or dry out and can cause this, so i just assumed maybe this was the case...is there a way of testing the caps to see if they are bad before replacing them? Yes there is but you need special equipment. Probably much cheaper just to replace the caps. This is a common problem with electrolytic caps, us oldtimers called it "motorboating" cuz it made radios sound like an outboard motor on a boat. You can put a shorting plug on the input to your sub and see if the sub makes the hum all by itself. If it still hums then I would say definitely replace the caps. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted December 2, 2014 Share Posted December 2, 2014 This is a common problem with electrolytic caps, us oldtimers called it "motorboating" cuz it made radios sound like an outboard motor on a boat. I just threw out a Dayton sub amp for doing just that. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted December 2, 2014 Share Posted December 2, 2014 I have a slightly different definition of "motorboating" Quote Link to comment Share on other sites More sharing options...
babadono Posted December 3, 2014 Share Posted December 3, 2014 I have a slightly different definition of "motorboating" Ok, I was imagining then I googled it, glad to know my imagination still works pretty good. Quote Link to comment Share on other sites More sharing options...
Turbox Posted December 3, 2014 Share Posted December 3, 2014 (edited) I had the same issue with one of my old subs. it was a problem with the power supply circuit. I took it in and had it repaired. Edited December 3, 2014 by Turbox Quote Link to comment Share on other sites More sharing options...
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