I'm putting my money on the ground...;)
ill throw my "ground loop/engine noise" problem in
installed over the weekend, friday nite i had the car on and was able to listen fine no noise.... now my cables were run in a "how can i run em to be able to listen to it today?" type running and no noise (once i fixed gain and some other simple things)
now on yesterday i ran 0/1 ga on passenger side along with speaker wire under carpet alont the corner of the floor. on the driver side i had run RCA's, remote turn on, and speaker wire. There was a bunch of factory wires already running so i thought "hey thatll be nice to follow", well last nite checked out this thread and realized that those were power wires and running RCA's 10 ft alongside power wires probabally was NOT the best choice. now i had listened to it, but not with the engine actually ON, just in ACC.....
So this morning i re-run the RCA's along the roof (there are no other power wires except along the A-pillar up front for the lamp lights) and ran it to the amp fine (almost too short lol but luckily was not).... now i also ran the RCA's for the sub even though i do not have a sub or sub amp yet so they are sitting in my trunk not connected (gonna un-hook them from the HU tommorrow). now the only thing i can think is that its a ground issue (since i just used a small lil crappy ground point that i knew was not the best ground but thought it would work to test)
heres the problem. in ACC no noise and GREAT SQ. As soon as i turn on the engine, i get a whineing noise.... it gets higher pitched with higher RPM's (and louder), and the amplifier gain directly controls volume on it.... gain all the way down=hardly noticeable whine, but its still there gain all the way up (or even 1/2 way) gives me inaudible music and all i get is the whineing
all connections are run fine and the only 2 possible causes are 1: RCA's or 2: bad ground
Quick question (I hope!)....
I have an older (stock) stereo in my daughters 1993 Mitsubishi Eclipse. It's worked fine up until now (we've had the car about 4 yrs now), but a few months ago started making a high pitch whine. It started doing it intermittently, and in between the radio sounded fine. Now it's doing it constantly...you turn the radio on, it's playing fine for a moment or two, then starts the constant whine.
I thought maybe the plugs and wires needed to be replaced so I tuned the car up...didn't fix the problem. Any idea what could be causing this? I'm thinking about getting her a new stereo and I don't want to spend the $$ on it if it's not going to fix the problem...
Any help would be much appreciated! :nw:
I had posted this thread a while back, but it recieved little attention, now that we've got a stickey, I'll throw it in here hoping someone gets some use from it:
What 12v line do I put the noise filter on?
I've got about 400 12v lines in the car. I've got the alternator whine comming through my computer sound feed.
Do I put the noise filter on the power line to the head unit? On the 12v line between the power supply and the motherboard? On the 12v main power feed going from the battery to the inverter? (And if that's the one, does it go on the positive or negative line?)
I feel like this is the answer to my altenator whine but I don't know exactly where to put the filter.
hi im getting this same noise as your on about but one thing is that when i move my steering wheel (its power steering)around im getting noise and when i put it full lock it gets louder and also getting it off the rev off the engine too.
iv been to auto electrian too and he hooked a suppresser on to the back of the head unit and it didnt elimate the sound at all he cant seem to find the problem and yesterday i just hooked up a ground isolator to the amp which just quietens the sound but not really curing it fully.
aswell as that when i showed him what i did he suggest a cap should finally do the job but i dunno if this wil work cos i dont want to waste any more money if this doesnt work.
i know its not the head unit cos i bought a brand new pioneer and the same thing still happens with this one.
could any one help me with this sutiation??
another noise problem.....
when i hook my labtop up to my audio system i get crisp clear perfect sound. when i hook it up to my carPC i get buzz.
I have my mobo sitting under the false floor in the trunk w/ no chassis, just attached by velcro. My guess it that since i lack a chassis my mobo leaks noise. Since im not particularly eager to get a chassis would a better quality RCA wire fix the problem (my current one is an RCA cable recycled from PC speakers)