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i have a pioneer headunit,a kenwood amp and 2 mtx subs.i was replacing my rear speakers in my blazer and i got a spark somehow and now im getting a humming sound from my speakers.i've never had this problem.i checked all the fuses all the wiring is right.what could be the problem???
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sounds like maybe a speaker wire is touching ground somewhere? tough to say at this point though,
where did the spark come from, the speaker area or the cd player area?
was the cd player on at the time?
is the humming coming from the subs only or all the speakers?
i was putting new 5 1/4 speakers in the rear door. it must of hit something and made a spark it was a big one too. i cant figure out how and the humming came from the subs and speakers.i just switched amps to see if the sound stopped but it didint which means it must be the deck or the rca output?
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weird. If I were you I think the place I would start is to remove the RCA cables from your cd player that go the amp. (try removing them at the amp first since that's easier, and dont let them get against ANYTHING!) if that stops the noise then we'll work from there. If not, remove them at the rear of the cd player and see. if that doesnt help, you'll need to remove your cd player completely. Then wire it to the battery and a speaker to see if, by itself, not using the vehicle's wiring, produces the same noise.
Hopefully removing the RCAs fixes the problem and like I said, let me know if it does and we'll go from there.
Good luck@
the weird thing is the rest of the speakers like the front and rear going through the stereo work. i had just the front speakers connected to the stereo and the rear ones to the amp.the rear speaker wires must have touched something positive.the only thing it could of touched is the window motor.The noise stops when i take out the rca so i hooked it up to the battery separate like you said and the thump was constant and i also noticed before when i first noticed the problem I touched the wiring harness the subs would make noise.I tried putting the acc. and the power together and when i moved the ignition they made noise.so its like the stereo is sending straight power through the rca's to the subs and rear speakers,what i dont understand is that spark came from the rear factory speaker wire from there to the harness then i connected the wires to the 2nd amp.i have 2 amps one for the subs and one for the rear.why wouldnt it blow the fuse on the amp and i dont have it hooked up and its still making that noise.the stereo must be the problem.the spark must of traveled through the amp and burned something in the stereo.how would i check if my amp is bad??
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yeah, unfortunatly the fuses in amplifiers wont blow unless there is a serious short in the amp. Actually the purpose of the fuse in the amplifier isnt to protect the amplifier from damage. it's to protect your car from burning to the ground once the amplifier has already had some sort of major malfunction. the fuse doesnt really protect the amp at all.
If you zapp the RCAs that can definatly cause a permantent problem in the cd player, you probably blew the ground and now have a floating ground. if so, you can always try to permanently ground the sheild of the RCA cables (can be riskey but usually (99%) wont hurt anything.) basically you can just take a very thin wire and sneak it under the ground screw (terminal) at the amplifier and touch it to the outter sheild of the RCA cable while its pluged into the amp. this will ground the sheild. sometimes it makes it worse, sometimes it makes it better. but if you got something across a posative that shorted out and blew the ground in the cd player, this may help. JUST MAKE SURE that the ground wire touches only the outter "shield" or ring of the RCA cable, not the tip part.
Try it! Let me know how it goes!
this never ends! i put another stereo in and switched amps! and im still hearing it.but when i changed stereos the subs didnt do anything but there was a little noise from the 5 1/4 and now when i put my g/f's stereo back in her car the damn thing doesnt work!!!!!!!!! i think my truck is cursed.could it be bad ground on the amp because ive heard that humming and popping noise before when i first hooked it up and it was the ground.could that spark disrupt ground somewhere and i switched rca's cables too.
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the spark wouldn't have runined the ground on the amp but your amp does need to be properly grounded (tight to bare metal) to function properly.
The spark may have runined curcuitry though and caused permanent damage.
Do me a favor. make sure your amplifier is properly grounded, (tight bolt to unpainted, clean, shiny metal) and get a piece of 14 gauge wire, run it from this ground up to your cd player and attach it to the cd player's ground (so the bolt has 2 wires on it, one that goes to your amp's ground, and this other one that goes to the cd player) dont use the ground from the wiring harness, only use this one.
See what that does.
i tried and its the same problem,i tried different grounds for the stereo and amp,but the weird things is when i took the power wire and touched it with the power wire from factory plug just for connection sake and the amp went on without the stereo or the ignition on.i still dont know if its the stereo or its the amp.who can i take it to?could it be the power wire is getting interference from the chassis or something of that sort?
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sounds like you have the remote wire for the amp going to the Red wire of the cd player instead of the blue remote wire on the cd player. that wont cause the interference though.
as for your question about the power wire getting interference from the chassis YES! thats pretty much exactly what happens, the car is made of steel which is actually a horrible conductor. the only reason it works is cuz theres so much of it. when you run copper posatives but use steel negatives, often times there's a voltage difference between the negatives between where the cd player's neg, is and the amplifier's neg is. Since the RCA cables between them either carry their own ground or rely on the ground of the car like a floating ground, the small volatage difference causes a voltage change in the RCA cable which gets amplified 100X by the amplifier and results in noise. this is why I asked you to try that "common ground" technique.
Other than runing your own common ground buss bar and your own power wires, etc. I'm not sure what else you can do to get rid of the noise.
i just bought a ground loop isolator and i heard music but it wasnt loud at all and the music sounded like an echo.the words were cutting off like in two different tones one word would be alright but in echo and the other words would be in the background real low also like an echo.im thinking its something to do with the truck but i dont know what or where to start. cuz i know that spark couldnt be enough to ruin the stereo or the amp.even if the ground was compromised it would spark right? ground is ground unless its touched by a pos. wire but then that would make a spark. plus everything in the truck works besides this problem.
Answerwell, the ground loop isolator still relies on both systems having proper sheilds on the RCAs. sometimes these are grounded so if a portion of the cd player's RCA's grounding system blew then the Ground loop isoloator wouldnt work right either. Again you can try the trick of manually grounding the sheild of the RCA cable (on the cd player side only of the isolaotor would probably work).
