I was watching a movie on my computer (Dell Dimension 4700) with my iPhone earbuds and I noticed that the sound isn't as loud as it could be at full volume in Windows and Windows Media Player. Later, out of curiosity, I pressed the button on the earbuds and the sound went way up for a second. When I held it in, the sound stayed high. Is there a problem with my earbuds, or is this with all headphones? ... Or am I not supposed to plug my headphones in a black box filled with crap?