I was wondering, if you were to run your remote wire on the same side of you car as your RCA's could it cause alternator whine to be heard through you speakers?
its funny, i ended up running my 4GA power wire, remote turn on AND left speaker wire all on the left side and i have no problem whatsoever with alternator whine. i guess it all depends on the wiring?
I have all of my wires running down one side of my van. I have had no problem at all. The only time I had alternator whine is when I had this cheap Pioneer amp. After a few weeks, it went away and never came back. Crazy.
Its a mix between what voltage the output is in the rca, the higher the voltage the lower the noise floor. Its also how well everything is grounded. If you check everything and you still have noise, put in ground loop isolators.