There's something up with the devices that were shipped out w/r/t audio quality. Here's why I say so...
1) Phone Playing to Bluetooth Headset and Bose Soundlink both get cracking/popping noise without any cables attached
2) When phone is plugged in car to charger and aux, severe alternator/road noise is present if no audio is playing. Once an audio source starts to output, the sound goes away, but the popping is still present just like with scenario 1
3) With the phone plugged into the aux jack only (no charger), same popping sounds noted
4) Issue persists with Beats on and off, no change.
So, one can reasonably be sure it's a phone issue, and the fact that it's picking up road noise so badly and outputting it over the aux out suggests it's a hardware flaw, which is bummer city.