Well I use my iphone when going to class and I use the included headphones. I keep the volume just below halfway. I have also used it in my car using a 3.5mm jack. Noticed that it some how remembers the volume settings. When I used my headphone it goes to 1/4ish like a had it. Then when I put it in my car it goes to full volume, like i use it. I thought this was kinda need. I havnt tried with different headphones though. Just thought i would throw that out there.