Just got my PA11-NIS installed and noted a slight whine that increases with RPMs. Car is an '03.5 coupe and using a 2nd gen iPod Nano. If I pause and turn the stereo way up, the whine is unacceptably loud.

Should I try scraping some paint from the PA11 and tie a grounding strap to it and the car chassis?

 

The same thing is happening to me. It started immediately after I installed mine too. Anyone know what we can do?

 

Has nobody else encountered this and come up with a solution?!

/bump

Cheers,

Tom

 

You could try a ground loop isolator from radioshack but that is a patch.

You may solve the underlying problem by running a grounding wire from your head unit (up front) back to your trunk and using the same grounding point that you use for your amps in the trunk. Basically the PAC Audio part ground level is not the same as your amp and you are generating a current.

When I did my stereo install I ran a 6 ga wire from the HU chassis back to the trunk ground point. I use a PAC Audio AIS-NIS2 (or something like that for auxilliary audio output leads) and never had an issue with noise.

good luck.

PS. Remember the PAC audio device is getting it's ground level from the HU, so if you ground the HU properly to your other audio equipment you should be fine.

 

Late reply but thanks, that would make sense. I wil check it out!

 

Update!

I spam-called the manufacturer of the interface and talked to what was probably the operator / jack-of-all-trades person short of being an actual engineer. If you call twice in quick succession, they pick up the phone the second time, otherwise they don't...

I insisted that my noise was alternator-related and she promptly dropped a noise-filter in the mail. Installation instructions were amateurish but once you take the harness out, clip off the zip-tie, the instructions make perfect sense.

If you go this route, the instructions call for using the filter inline with the red wire, or try orange if red doesn't work out. In my case, orange was the correct solution.

 

I have the same problem and want to call them up but I cant find my manual. Anybody got the phone number handy they could PM me with. TIA

Jason

 

nevermind...i found the phone number

 

Spoke with someone and they were quite helpful....they were going to call me back. And they even answered on the first time calling. Better customer support than most companies out there.

 

yeh
some of those companies would be import trendz and Integrity Auto

 

Are those of you with the PAA11-NIS leaving your iPods connected when the car is turned off or do you unplug it everytime?

 

Mine stays plugged in more often than not. After an hour of the car being off, the PA11 stops charging the ipod and the ipod shuts down automatically.

 

ok question for you tom
here is a picture of the filter and the instructions i got.



there are 2 wires coming out on each side a black and a red. i would take it that the black wire comin off the filter will go to the black wire in teh diagram. then i will take the red wire and put it on either the red or orange wire. their instructions say to try the red first and then the orange, you said the orange worked for you, did you try the red wire? also my box has is labeled in and out which why should i orientate the box? should out which is on the right in my picture be towards the 12 pin or should it the towards the pass threw. im thinkin out should be towards the pass threw the 10 pin. bcause from the directions it looks like the 12 pin is the input from the pac.

 

I tried red first and it didn't work at all. That's why I respectfully suggest you try orange first.

As for the in/out scenario, I recall making the same assumption you are; "out" towards the 10-pin connection and "in" toward the 12-pin connection. I personally used little tiny twist nuts to test it out before using more robust connections and black tape to finish it all up, just in case I had it wrong. Since I know jack sh*t about electronics, I'm not even convinced the in/out stuff even matters. The black box the filter comes in looks to me like it was designed for a fuse and was was merely re-tasked for this filter project.

Cheers,

Tom

 

Why the f*** wasn't this part of the NIS out of the box? Now I have to call them. I've just been dealing with it for the past 6 months. It is really only audible when watching dvd's and really low volume music.