OK, so I finally did some more troubleshooting on my carpc to find out where the source of the noise is coming from.
The noise is basically like faint white noise which doesn't really change with RPMs, it's just static and annoying when music is low or not playing.
BTW, this noise occurs anytime the RCA is plugged in from the carpc to my amp. The noise comes from my speakers, obviously. :rolleyes:
I found out that the cause of the noise is both my carpc's power cable (via an ITPS mind you) and also the VGA cable when the LCD is plugged in. Nothing even needs to be on (LCD/carpc), it just occurs when the engine is on. :(
So clearly the engine noise is coming in from +12v. But why is it going out through my amp and not somewhere else? Do I have a crappy ground somewhere? :confused: My carpc is grounded to the same place my amp is, and it's a pretty good ground (4awg with a huge ring terminal and the ground point was filed/sanded to bare metal). I also tried adding a chassis ground to the carpc case, but no luck.
Or maybe my sound card needs to have an extra ground added? If so, where? I have the Audigy 2ZS. I should probably try the Via M10000 native audio out and see if they, too, exhibit this noise.
:confused: :confused: :confused: