Audio gurus get in here...

SON240sx Automotive
1

Ok, so all the audio equipment in my car is replaced with aftermarket
stuff (rear speakers, front door speakers, head unit) as well as an added
subwoofer+amp.

My music sounds fine, clean, no distortion, etc.

I also have an iPod that I bought an auxiliarry input for so that I can hook
it up to my head unit.

It was fine, but then I started hearing a buzzing/high pitched whining
noise while driving (and the noise seemed to change as I hit the accelerator).

So I went and bought a ground-loop-isolator and hooked it up to the
sub-woofer RCA jacks. But i still seem to get the noise.

I don’t know what to do?

Any ideas?

2

sounds like the system is picking up alternator noise.

how to fix it? only jantos knows.

3

If your speakers are connected directly to the HU then you’ll need to reroute the ground from the p/antenna to a separate source (eg. shifter bolt).

The only reason the ground loop isolators took away the whine for me is cuz my components are amped.

4

check your grounds…and reground them…

you may have to add an inline filter…

alternator whine is a common problem…

5

i get that too but only from my passenger side mid-woofer…

strange.

6

I am gettin mad alternator noise, which is exactly why I want someone to do my install. Unless of course the info is posted here and is mad easy to fix. I gotta get rid of that shiz, it is so annoying. I just tell chicks my car sounds like an aircraft… :shock:

7

If it’s just a ground issue, what’s the best ground? The -ve terminal on the
battery? :dunno:

I have several things hooked up with the same wire that grounds
everything (head unit and gauges mainly).

8

My car was whining pretty bad when I first got it. So I ripped my interior apart and found about 30 feet of unused speaker wire run through the car. Removed it, and problem gone.

9

don’t hook up multiple things to one ground, and keep the ground wire as short as possible. i like the bolts for the shifter as someone mentioned earlier, there are also a couple places in the trunk and behind the dash (i got an s14 though)

10

you need a cap man, itll draw more power off the cap then then the batter, solves dimming od dash lights when your subs are going as well

11

What you are getting is a ground loop.

Ground your deck to the same point as the Ipod interface.

12

The iPod doesn’t ground to anything. It’s a portable.

I’m going to try grounding some the head unit and gauges to different
ground sources rather then all to one thing.