Hey guys, yesterday my step-dad and I installed an amp and 4 speakers... it all sounds terrific, except there is a constant high pitched ringing – its not very loud but when the stereo is turned down it is very audible and quite annoying...

Any ideas? The amp is grounded to a piece of metal in the back of the car, and all the wires are covered in the rubber surrounds except for the ends where they connect to the terminals (naturally)...

For reference the amp is Jaycar response 4x100wrms, front speakers are 6.5" splits with crossover and 2" tweeters, rear speakers are 6x9s...

I've been told to get an in line car noise filter...is this what i should go for? or have I done something wrong? And if I do need a car noise filter, should I go for a 5, 20 or 40 amps rated filter?

Thanks guys

not grounding properly

have you rubbed back the metal ear where the ground? is it grounded to a suitable spot?

not grounding properly

have you rubbed back the metal ear where the ground? is it grounded to a suitable spot?

what do you mean by the metal ear? and i think it's grounded to a suitable spot... i bolted it to a piece of metal that looks like it reinforces the back right panel of my wagon... is this ok?

was meant to say near,

because paint doesnt really conduct electricity well

Could be RCA interference aswell, I've had that problem before, turned out to be a dodgy RCA.

was meant to say near,

because paint doesnt really conduct electricity well

haha i getcha, yeah it was bare metal, not painted. i think it might be the ****ty speaker wire we used for the rear 6x9s because when i put them on Low Pass Filter the high pitched ringing doesn't transmit through any speaker. Does that make sense?

6x9's shouldnt have the LPF on them :S

did i say i was leaving it on LPF permanently? i was merely saying that during my extensive testing of said 6x9s, that when they were subjected to being passed by a low filter, the aforementioned ringing was removed and my listening pleasure increased tenfold.

just saying that by letting them run only low freqs it removed all the ringing, meaning the fault must lie in the 6x9s, namely their wiring

6x9's shouldnt have the LPF on them :S
He's using that to test..

If you turn the low pass on and the ringing stops it doesn't really determine much, though that'd suggest to me rcas before earth simply because the interference on the rca would be cut out by the low pass from the amp.

He's using that to test..

If you turn the low pass on and the ringing stops it doesn't really determine much, though that'd suggest to me rcas before earth simply because the interference on the rca would be cut out by the low pass from the amp.

wouldnt it suggest the wiring on the speakers? i guess it could be either? some more tests would be really helpful to be able to nail it down.. what if i swap the RCAs at the amp end, like swap the RCAs that are for the front speakers to the rear and see if problems persist?

6x9's shouldnt have the LPF on them :S

that being said i don't mind leaving them on LPF for the added bass, all i need is the fronts :D

wouldnt it suggest the wiring on the speakers? i guess it could be either? some more tests would be really helpful to be able to nail it down.. what if i swap the RCAs at the amp end, like swap the RCAs that are for the front speakers to the rear and see if problems persist?
yeah swap the rcas, but turn the low pass off first of course.

It wouldn't suggest a problem with the speaker wire because in that case it'd be there LPF or not. The amp wouldn't be able to cut it out with a Low pass. Low pass will only cut out higher frequencies inputting into the amp from the source.

Your wiring is fine to the speakers, What RCA's are they? cheap ones or pretty good ones? if you have good shielded ones you can run them next to your power cable no worries. if they are cheap el crappo ones you will have a problem like this if its ran near a power cable

;1038767']Your wiring is fine to the speakers, What RCA's are they? cheap ones or pretty good ones? if you have good shielded ones you can run them next to your power cable no worries. if they are cheap el crappo ones you will have a problem like this if its ran near a power cable

um the RCA cables are rampage? or something? from super **** auto... so i would assume crap :(

can i run anything alongside the power cable? or will speaker and RCA cable both give me problems

thanks for the response tuffy

yeah swap the rcas, but turn the low pass off first of course.

It wouldn't suggest a problem with the speaker wire because in that case it'd be there LPF or not. The amp wouldn't be able to cut it out with a Low pass. Low pass will only cut out higher frequencies inputting into the amp from the source.

cool cheers dude! ill try swapping RCAs, then if that doesnt work ill have to trace the RCA cables along the other side of the car

Dont bother, get a 2x RCA to 3.5mm cable and plug in your ipod or something.

That will soon tell you if it's the input or the amp.

Do you have a Pioneer deck by chance?

plug the ipod/mp3 player into the amp you mean? ok will try that tomorrow

and no, kenwood deck, kdc-x8006u :happy:

Yep, just make sure volume is turned down on the Ipod first and slowly turn it up.

There will be no unusual noise if you hook that up first to test if it is the amp or the cables :D