Next you'll be telling me to destroy my vinyl record collections.
Okay, let me know when your iPhone can play vinyl records. Be realistic. Vinyl is probably still better quality than digital, however, the iPhone cannot play a vinyl record so why even bring that up?
"The main drawback of using an auxiliary input has to do with the difference between a car stereo and earbuds. Earbuds are small and unpowered, whereas even the simplest car stereo system has much larger speakers and an amplifier, whether it is stand alone or built into the head unit.
The issue is that when you use an auxiliary cable, your iPhone does all the heavy lifting. The iPhone processes the digital music files that you have stored on it, and it transmits the resulting audio signal via the headphone jack to the aux input in the head unit. Since iPhones are designed with earbuds and headphones in mind, and they don’t include line level outputs, additional noise may be introduced to the audio signal when it passes through the amplifier in your car stereo. Of course, noise can also be introduced via the cable and jacks."
"The main benefit of a USB input vs an auxiliary input is sound quality, but these connections often come with other benefits. For instance, some head units can take direct control of an iPhone via a USB connection. This is sometimes referred to as
direct iPod control, and it’s a lot safer and more convenient than fiddling with your phone whenever you want to change songs or adjust the volume. Of course, the level of integration varies from one head unit to another. Some head units, like Pioneer’s
AppRadio, include iOS-like touchscreen controls, and others are a little more cryptic."
