If i plug in my iPhone charger or now turn on my aftermarket HIDs - the radio reception drops 50%. Not alternator noise, but rstock adio reception only....

Turn off the gear and immediately the reception is restored.

 

if you had satellite radio you wouldn't notice problems. a lot of electrical components mess with radio signals. especially if it's a station that doesn't come in good to begin with. there isn't much you could do to eliminate the problem