The Nexus 4 outputs much lower volume through AUX than the Galaxy Nexus (although the Nexus 4's Speaker volume is just fine and loud). I always use the AUX on the phone and listen to music in my car. At max volume, the Nexus 4 is nowhere near the Galaxy Nexus' max volume. I put my car on its max volume and it isn't loud enough on the Nexus 4. I have looked everywhere for a temporary fix but can't find any (hopefully Google eventually fixes this in the next software update). Anyone know of any? I have tried several volume boosting apps and they don't work on the Nexus 4.