OK, here goes...
We travel with a laptop that houses our entire music collection (~80 gb - ripped using iTunes)
I have changed out both my truck and AS stereo with a JVC head unit (12v, of course) that has a front aux input that I feed from the laptop audio out (standard run-of-the-mill analog output - 1/8" stereo mini to 1/8" stereo mini)
In the AS, if I power the laptop using the 110v adapter, I get nothing but noise. If I use the 12 volt
adapter, everything is fine, the music sounds great. OK, I can live with using my 12v
(Noise also happens if I use the 110v adapter plugged into a small portable inverter that is plugged into the 12v
in the truck - using the actual 12v
laptop adapter works fine - no noise)
[I know what you're thinking - why I would use the 110 v adapter in an inverter if I have a 12v adapter to begin with...well, let's just say it's the whole "which came first, the chicken or the egg?" scenario!!]
Anyway, I decided on our last trip I would like to run the stereo output from the standalone dvd player through the AS stereo speakers instead of the putzy TV speakers. The audio output from the dvd player (110v) going to the JVC (12v) aux input results in, you guessed it, nothing but noise.
I'm certain that a straight 12v dvd player will solve the problem (haven't tried yet - I'm assuming success based on the laptop experience), but I'm curious to know if there is a way to filter the noise.
The AS is a 2003 Safari and it looks like from the schematic that both 110v and 12v systems are grounded at the same point, so I would guess that it is not a ground loop issue.
Can anyone shed some light? - Is it just not possible to "interconnect" 110v and 12v components together sucessfully? Obviously, this is the first time I have ever tried "mixing and matching", so to speak.
Thanks in advance.